Thank you so very much for this. I am retried and on SSI. I could not afford to take my 2005 Chevy Silverado to a mechanic. It has been 100 degree days here in NC. I did go purchase the pressure switch, and guess what? It worked!!!! I am very indebted to you for this video.
Am in the Central Valley California getting hot at 109 degrees and my Sentra is having same problem. Iam switch the part out hopefully it works for me too
I love that there is a GM favored channel on YT that aligns with my shared ideals of longevity and maintenance over replacement. You are doing a good thing, and I wanted to take the time to thank you for your content.
Hey, Thank you! You have saved me much grief. I own an 02 suburban, the AC quit, I changed the pressure switch like you suggested and it now works perfectly! Very informative video!
Man, life saver. Just in time for the long weekend. Thank you so much for your video. I used the same switch right from your video, and everything is working as it should. Clutch is turning on and off, and ac is cold as before.
This part replacement fixed my 1998 Chevy 2500 Silverado today. I had just replaced the compressor, had the AC charged, and then it was doing exactly as described in this video. Sadly, I hadn't seen this video until after paying $213 for inspection and then to test and replace this part. But thank you for sharing this video to save others! ❤
YOUR THE BEST I COULDN'T RECHARGE THE SYSTEM BECAUSE THE CYCLING SWITCH WAS CAUSING IT TO GO ON AND OFF THROWING OFF THE CHARGE PRESSURE I REPLACED THE SWITCH AND COMPRESSOR STAYED RUNNING AND ALLOWED ME TO FULLY FILL THE SYSTEM AND WALLA!! ❄️❄️🥶🥶🥶🥶❄️❄️❄️👍🏽👍🏽👍🏽👍🏽👍🏽 FEELS LIKE ALASKA IN HERE!!!! THANKS AGAIN I DEFINITELY SUBBED AND HIT THAT👍!
I’d like to say for a guy who’s not a mechanic. Your presentation is perfect! I haven’t applied your suggestion yet, but even if it turns out to something else. Your convenes is super logical Simply put,Thank you! I will be following you!
I’m troubleshooting a random issue with my car and even though this is not the issue, I must say, this is a well produced video….very inspiring for my own content. Great job man.
FIRST! 😂🤙🏼👍🏼 Great vids and channel for the fact that you have an 03 suburban like I do! It seems like we’re having the same issues. Keep’em coming and you ain’t missin nothing over here in Cali but POLITICS & HIGH PRICES!
Thanks for the video. After 407,000 my relay went out. I was really thinking it was going to be something much more involved given the mileage and everything being original. AC will make you want to put a sweater on now. 😎
Now ever time I turn on the AC I do get cold air. I think the fix worked. It's already cool weather where I'm at - so kind of hard to tell. I'll keep you updated but so far very promising.
I had this problem when the vehicle was idling in 100 degree weather , cuts off and on and off ect. Not sure if its because of that part or because these vehicles were not made to cool off the cabin in extremes temps at idle
I wish I would have seen this video 5 months ago. I replace my ac compressor and after 1 month it would have same problems you described. I replace the switch and problem solve.
Great insights! My chevy spark auto climate ac only blows cool air when blower is set to 1 and 2, post 2 the compressor disengages and obviously only blows hot air. Could you please help me with this situation? I have already changed blower resister controller, no luck
Just have a question for you, did you test the old low pressure switch and compare it to the new one? can you test the component?? please help me out. Thanks!!!!
I'm having the same problem with my 2001 Ram 1500. Thank you for making this video. Note: I have Sweetwater stickers on my filing cabinets like your toolbox has. 😀
@@dabeersboys I was only able to find a high pressure switch (mounts above engine), but could find no one that had a low side switch (mounts similar to one in video). It's been a year, so I should try to locate one, again. Replacing the one switch didn't solve the problem. I suspect it's the low side switch that's acting up. For the first 10 minutes while outside temperature is high, it cools properly, then air gets hot out of AC vents. On an overcast, cool day, (or on a cool night), the AC runs perfectly, never starts blowing hot air. So I believe it's a switch related problem; the unit makes very cold air when it keeps running.
@garycook5125 awesome. I was looking at mine and I was only able to find the one. When facing the truck, left front side. When I search for parts online there is only the one part that shows up. So if there is two, they must be the same part. Mine does not blow cold ever. Good luck! I for some reason read 2021. Not 2001!
@@dabeersboys Yes, your newer model is probably different. After responding to you this morning, I located one (only one), low side switch at an AutoZone in town. My wife picked it up, and I'll install it tomorrow. This problem has plagued me since 2007 (I've been too tolerant). I'm pretty anxious to see if it works. One question: does your AC clutch (on the front of the compressor), engage when you turn the AC on?
I've had issues on my '02 Blazer with the low side Schrader port sticking open, causing me to loose full charge. On the car's I've owned I've never had a pressure switch fail (I'm sure now that I've said that it'll fail lol). Good to know you can just unscrew those, I've always thought you had to vacuum the refrigerant and then replace it, vacuum the system down and then fill it back up, but this is good to know for the future!
You do have to remove all the freon replace the part then vacuum the system down and recharge on most vehicles. His vehicle is probably the only one I've seen like that.
@@MN2_Kevin_Hill_1970 no you don't not on most cars you do it just like he just did on his what kind of car do you have so I don't buy one of those 😂👍
So for anybody reading this later, they're talking about systems that don't have a Schrader valve. You should absolutely check if your ac system specifically has a Schrader valve before doing this yourself because in some cars you do need to evacuate all of the refrigerant and recharge it after, because it will escape if it doesn't have a valve. It's not only in new vehicles but different manufacturers started putting them in in different years. Do your research and be mindful that I think they can be added on to some systems, and there are similar valves on other parts of some cars, so finding a replacement valve doesn't guarantee your CURRENT **ac** system has one installed. It is not at the end of the world if you make a mistake and refrigerant escapes, but it's really bad for the environment (and therefore YOU) so if you are wrong just move away from the car and return after it leaks out. I do not recommend doing this without breathing and eye protection personally just Incase, but that's me having family and friends in HVAC and knowing little enough about cars to be cautious.
Yeeeeessss! This has been my exact issue in my 04 2500 HD. Will be trying this soon to see if the random crazy ass hot air that is completely random stops.
I have an 01 marquis, my accumulator cylinder is similar to this gm. I recently swapped everything and hoses but the switch as I lost the new one I ordered. I recently charged it, pressure held for less than 30 min. I checked the lines and they are tight. Bought another can of r134a, charged it, drove it, checked the engine. I heard hissing by the accumulatior and noticed a spray leak where the switch bolts on, I checked for tightness which is t was, then removed it- hissing stopped. Im quite sure I isolated the leak to a $15 cycle switch which comes as a relief. Im ordering another. My compressor is good still as it kicks on and off with varying pressure. My question is: How common is a refridgerant leak from the cycle switch?
Thank you for this video. I ended up getting a Napa brand pressure switch because they were out of the genuine GM part, had to buy O-ring separately but no big deal.
I pray that u have solved my problem. I have the EXACT same problem,(2010 chevy express) I replaced the low side years ago, now it randomly burst the refridgerant out of the compressor valve.. and I've literally replaced everything else and blew out the lines. but I don't get ANY pressure on the high side when I put gauges on it. just replaced high side switch and it's working again,......well see tomorrow
Okay I have a 2016 GMC Chevy van my question is my Freon leaked out I seen it leak out so I went and I bought some sealants and more freon to put in there I bought the two cans with the gauge on it so I put them both in there and everything was great for a day and then in the morning I was sitting waiting idling and the same thing happened I seen it leak out I could see the liquid or the mist and that was that now believe it or not it is still cool in my van pretty cool my question is why is this happening any advice would be grateful thank you
If clutch cycles on and off it’s a good sign the Freon is low small amounts do leak out over time. If nothing happens but the clutch works jumping out the clutch relay then it’s probably a bad AC pressure switch the PCM won’t ground the clutch relay or the cooling fans relays if the pressure switch isn’t sending out the voltage the pcm wants to see
I have a 96 izusu oasis same as 96 honda odyessy, my front and rear ac blows ice cold but after a few mins the front starts getn cool than ambiant temps but rear remains ice cold, their are no leaks no compressor issues, yes compressor is still running while this is happening, what could be going on? And yes frigerant is at proper levels
I have a 2014 Chevy silverado 1500. I have code P0532. What should I be looking for. My air conditioner doesn't get cold, and the fan on the motor is loud . My gouges look normal and don't show signs of overheating. Should I have to switch the refrigerant pressure sensor?
In my Corolla it was a bad radiator fan. You hit a bump or give it a manual spin and it would start turning and the AC would kick on… even if it was barely turning. Driving would move enough air to make things ice cold, at least until you stopped.
Hi, mine is Ford Fiesta 2011, 1.6S with 20,000KM on it. Lately, I noticed that the AC compressor is not cycling off at all whenever i turn on the AC. Do u have any suggestion what to suspect ? I live in Indonesia with outside temp is like 30-35 degC. Thx
Hi sir. The high pressure switch should be close when checking by multimeter . But my dodge caravan 1999 bought 5 high pressure sensor still not working. .check it by multimeter had 6 thousand ohms even thought put on compressor air does it is wrong part ? Thank
I have a 2001 Chevy Silverado 1500 with a 5.3 L motor in it my air conditioning just stopped working I usually do all my own work and if I don't know how to do it I come on UA-cam to find out how to do it I'd like to know what your suggestions are to fix this issue I would test it off and on during the winter and it would work so as per 2023 I want to turn it on for the hot weather and it didn't work anymore
I have a 2006 Chevy Silverado 1500 with 140000 on her and mine was doing the same thing after doing some homework I decided to replace the actuator door being my truck only has 1 and the part was cheap as well but so far that seemed to fix the issue. I wanted to also add when this problem would a cure I found that turning the motor off and restarting the motor the problem went away and my ac would work again but now since the new part is in all is good .
@@paulieglockzz actually I'm not sure but it did seem like the ac compressor was still running but no cold air just hot air when this problem would acur.
I’m hoping you can answer my question. My AC does do what you said on this video. But it also has a squeal when I shut off the car. And no one can tell me what it is. And it only makes the Squealing noise when the AC is on. Helppp plz.
05 ENVOY Xl SLE, 222000 daily driver work TRUCK. the motor not the dash tells me when to change oil. 3000 miles avg.i begin to think it's finally going to have problems cause it doesn't feel right , no light or codes. Change oil and the doesn't feel right goes away. Just typical maintenance on high milage vehicle. No where near the Tahoe nightmare previous daily driver when wasn't working on it.
I have this problem currently on my 08 Envoy. Before finding your video, I replaced the low pressure switch. Unfortunately, I still have the same problem. I honestly believe it's the high pressure switch and I am having problems locating it under my hood. I was hoping your video would have at least covered the location of the second switch ad it was mentioned in the video that if replacing the first could possibly not fix the problem. Any advice as to where I can find a diagram or a picture of the location to help me out? Thanks in advance.
I know it’s been a few months but I’ll respond to your question. It’s usually down on the refrigerant discharge line pretty close to the compressor. That line goes straight from the compressor to the condenser coil in front of the engine radiator. Some have only 2 wires like the low pressure switch in this video. Some of them have 3 wires and are called a pressure Transducer. Transducers convert a pressure reading into a low voltage electrical signal that a computer can read. The HVAC head unit or controls have the “computer brain” as part of that piece. So it decides based on a number of temperature and pressure readings how to keep the HVAC system running close to the temperature you set it to. Those have same the simple to replace design with the valve core inside the pressure fitting that it mounts to and O ring to seal up leaks.
Hey hey buddy, I’m having severe issues with my truck. It’s a 2010 Chevy Silverado. It has no low pressure switch on the Cannes. I can’t find a low pressure switch but my high pressure switch is coming off the compressor off the small line it might be the same thing for your envoy because the years run similar check there takeoff your passenger front tire, takeoff the fender wheel well and you’ll see the sensor right there. That’s how it is on my truck.
Great video. I replaced the low pressure switch, but this did not seem to solve the problem. Where is the high pressure switch located, and can I replace that?
You "can" replace both but they're not always both accessible/easy to reach. Find what your replacement switches both look like; they usually both have round silver hookups and the rest is black. typically the black portion on one is flatter and elliptical/rectangular (in my case low), and the other is circular (in my case high).
My honda accord sometimes does that,but turning off the A/C for 2 minutes the cold air comes back,It's been like that for 2 years now,Could it be the pressure switch?
Great video, thanx. I have Impala 2015 and I almost face the same issue maybe. No gas leackage found, but the compressor goes off for a very long time then its on again and off again, so annoying. This only happens in summer, but I noticed no issues in winter time? Do you think the pressure switch can resolve the problem? Some the videos suggested replacing the control valve of the compressor. . Any suggestions ?
@@thelastbanana0678 Not yet. I need to take my car to an a/c service workshop, but driving in this heat without a cool a/c is another story 😧. Will try to go today maybe.
@@thelastbanana0678 yes I totally agree with you, those two parts are the main cause of such problems. Let them check level of the Gas (freon), it causes similar issues when its high or low. All the best bro.
Thanks like your Chanel. my daily driver work truck is 1999 2500 sub. Runs like a champ, odometer just hit 200.000 Of course, i've replaced just about everything under the hood Spider injectors Radiator alnator starter. Replaced head gaskets. Had the heads machine, new valves, valve seats My wife's car is 06 envoy .I'm having Similar problem
Thank you so much for the video. I have an 04 trailblazer when I have the AC on it stalls out at traffic lights. Somebody told me to replace the switches that you were talking about. What do you think?only stalls out when the AC is on
I have (or had) that exact same issue w the exact same vehicle. "Oil pressure low. Please turn off vehicle." on the dash?? I dug and dug trying to find the problem. Eventually an O2 sensor crapped out and went into limp mode. Since replacing that I haven't had it stall out. But, I don't think it was the root cause. It still drives sluggishly and doesn't get very good acceleration. Also had to replace a low beam headlight relay around that time. One thing I found was the oil pressure sending unit, which is just a little screw on piece, but requires a specialty socket. I never did figure out what might have been causing it. I think I have a ground fault or a bad fuse somewhere. Almost every time I turn it off there's a buzzing noise coming from the OnStar speaker next to the driver side door. And my AC is out now after getting it charged and tested for $160 two weeks ago... Did you ever figure out what was causing yours to stall? Mine frequently stalled while sitting in park, in reverse leaving a parking spot, or right as the light turned green lol. Commonly, but not always with the AC on.
@@terrapinflyer273 my low beam, headlight relay blows that once a year AutoZone by the first one for replacements, as far as the stalling out, it did have to be last week and get stuck in the middle of the street towed it to my buddies come to find out the battery terminal leads I guess a little screws, and all the cables to the battery were stripped. I’m not making a very good contact since I replace them it runs like a top. I don’t know if that was a problem but it’s running pretty good right now.
On my 98 blazer the pressure switch in unplugged and the connector piece from the harness has a paper clip inside with electrical taped over it as some sort of bypass. It was like that when I bought it. I had a vacuum leak from a few deteriorated lines that I replaced. After replacing I noticed a weird sound when I turn on AC or Defroster. The ac clutch plate is not engaging and when it does it sounds real loud. If I turn the regular air on the sound goes away immediately. Not sure what to do
I have high pitched squeal that gets louder when I accelerate. The sound is only present when I turn the accelerate on. I've justreplaced the belt and alternator on my pontiac g6. Do you know what it might be?
Well, I like simple Solutions and even more of they are a cheap ones!. I have a liberty Kj and I changed that a/c cycling switch 4 years ago....i had the same symptoms than your truck. Two weeks ago I'm facing the same problem.... So, i will have it changed again.
My pontiac grand prix AC doesnt work well when its hot out. It blows hot air for about 10-15 minutes and then it will all of a sudden blow ice cold. Only happens really during summer. Thoughts? @1Road
Would you be able to hear a compressor or something kicking on when its blowing cool then kicking off when it starts blowing warm .thats what my ac is doing....does this aboutbevery 10bseconds or so at idle
If this is faulty can the compressor not come on at all? when I jump the switch the compressor kicks on. but won't kick on at all other the hot wiring it quick. the freon level checks out good with the ac kit I bought
Yes this how it all works the PCM computer looks at the pressure switch and it wants to see a certain voltage most work on a three wire set up ground power and signal. You should have either a 5volt power or 12volt power and a 5volt signal and ground be 0volts. When the pressure gets low or the switch is not working properly it sends a signal back the the computer if the computer sees a good signal voltage it will ground the Ac clutch relay and the cooling fan relays and boom you’ll have Ac. It’s a safety switch so the compressor douse not get damaged with low pressure in the system
Salam to All, I've been suffering from this quite some years, replaced thermostats and heat sensors and even ECU, but still the problem as Frank pointed randomly occurs, I question the symptoms to be clear on the solution: The temperature gage goes off, and the AC stops cooling and air is hot amd moist, the AC will never work till the bettary is disconnected (car reset) or errors cleared with ODB2 device, is this symptoms you've been facing ? I ordered the part and will try with the pressure gage as a last resort, as I tried everything, My car is the beautiful GMC ENVOY 2006 4.2L Thank you for your video, please advise if the same symptoms occurs..
I have a 2016 chevy colorado. At about 50k it started randomly blowing hot air, but would always blow cold again after five or ten minutes. It seemed to progressively get worse and eventually stopped working altogether. I took it in and was told there was a leak in one of the pressure fittings on the hose. That was replaced and the AC worked again for a while and then stopped. I took it back to the same place and now they tell me the condenser is bad and needs to be replaced for $1,400. Is this making sense? Do you think it's possible this pressure sensor could be the issue? Is it worth trying, or just trust the professionals and replace the condenser and drier?
It's usually cheaper to just replace something small like the sensor switch and see what happens. A/C is complicated, and troubleshooting by itself can get very expensive, so try the easy fixes yourself first. (I have the same problem.)
I have a 2015 Chevy Silverado and for what I been looking at is those condenser are junk mine just quit working as well you tube condenser in that make and you'll see what iam talking about
Does 2007 honda pilot have build in cover after taking out the pressure switch because I’m afraid that the refrigerant might spill out if it doesn’t have a cover.
My sierra wont get cold while at highway speeds, granted its hot here in az. but it did eventually get cooler when I got down to 30mph and if just in town driving it wont get cool enough.
What will keep my compressor from kicking on I got a $3,800 series 2 Buick Park avenue when I tried diagnosing the low pressure switch I put a piece of wire in between you know bypassing it and my fan kicked on but my clutch didn't engage on my compressor but when I hardwired my compressor to the battery it comes on and blows cold
Thank you so very much for this. I am retried and on SSI. I could not afford to take my 2005 Chevy Silverado to a mechanic. It has been 100 degree days here in NC. I did go purchase the pressure switch, and guess what? It worked!!!! I am very indebted to you for this video.
Am in the Central Valley California getting hot at 109 degrees and my Sentra is having same problem. Iam switch the part out hopefully it works for me too
I have an 06 sierra in CT, I have same issue plus at times the fan doesn't come on. I have to do this tomorrow
@@myveryfirstname check condenser in your case. If it involves the fans.
Bumass
I love that there is a GM favored channel on YT that aligns with my shared ideals of longevity and maintenance over replacement. You are doing a good thing, and I wanted to take the time to thank you for your content.
Hey, Thank you! You have saved me much grief. I own an 02 suburban, the AC quit, I changed the pressure switch like you suggested and it now works perfectly! Very informative video!
Man, life saver. Just in time for the long weekend. Thank you so much for your video. I used the same switch right from your video, and everything is working as it should. Clutch is turning on and off, and ac is cold as before.
This part replacement fixed my 1998 Chevy 2500 Silverado today. I had just replaced the compressor, had the AC charged, and then it was doing exactly as described in this video. Sadly, I hadn't seen this video until after paying $213 for inspection and then to test and replace this part. But thank you for sharing this video to save others! ❤
YOUR THE BEST I COULDN'T RECHARGE THE SYSTEM BECAUSE THE CYCLING SWITCH WAS CAUSING IT TO GO ON AND OFF THROWING OFF THE CHARGE PRESSURE I REPLACED THE SWITCH AND COMPRESSOR STAYED RUNNING AND ALLOWED ME TO FULLY FILL THE SYSTEM AND WALLA!! ❄️❄️🥶🥶🥶🥶❄️❄️❄️👍🏽👍🏽👍🏽👍🏽👍🏽 FEELS LIKE ALASKA IN HERE!!!! THANKS AGAIN I DEFINITELY SUBBED AND HIT THAT👍!
I’d like to say for a guy who’s not a mechanic. Your presentation is perfect! I haven’t applied your suggestion yet, but even if it turns out to something else. Your convenes is super logical Simply put,Thank you! I will be following you!
I’m troubleshooting a random issue with my car and even though this is not the issue, I must say, this is a well produced video….very inspiring for my own content. Great job man.
Change the high pressure switch also. There’s 2 switches on the system.
Dude I drive the same car as you and you have been saving my life with all your niche issues and fixes
FIRST! 😂🤙🏼👍🏼
Great vids and channel for the fact that you have an 03 suburban like I do! It seems like we’re having the same issues. Keep’em coming and you ain’t missin nothing over here in Cali but POLITICS & HIGH PRICES!
Jimmy...you would think one of the monitors of the OBD2 platform would trigger a DTC.....is that possible for your vehicle?
Would live to receive more of your videos. They are great😊
Thanks man, any cheap things that we can do ourselves really helps🇺🇲💙🇺🇲
Jimmy what camera do u use? Your vids look very clear. Thanks for sharing
Is that the same part number for the 1995 Suburban? I have a '96 and think I need that. What specific O Ring did you use?
Thanks for the video. After 407,000 my relay went out. I was really thinking it was going to be something much more involved given the mileage and everything being original. AC will make you want to put a sweater on now. 😎
Informative would be good to know other systems it controls especially if more than pln connectors ie a cooling fan
Now ever time I turn on the AC I do get cold air. I think the fix worked. It's already cool weather where I'm at - so kind of hard to tell. I'll keep you updated but so far very promising.
I had this problem when the vehicle was idling in 100 degree weather , cuts off and on and off ect.
Not sure if its because of that part or because these vehicles were not made to cool off the cabin in extremes temps at idle
I wish I would have seen this video 5 months ago. I replace my ac compressor and after 1 month it would have same problems you described. I replace the switch and problem solve.
So is the high pressure switch the one on the back of the compressor that's held in with a snap ring?
Nice job Jimmy.👍👍
Great work Jimmy
thank you for posting this stuff!!
I wish you would explain where that pressure switch wiring circuit is in the ac circuitry
I could not agree with you more on the proactive repairs! Parts for my 89 Silverado are cheap and it is very easy to work on.
2007 Chevy uplander do I have to evacuate the air cond system before replacing low side pressure switch or is there a check valve?
Great video. Super presentation. This made my situation very clear.
2oo7 Chevy uplander.Does the compressor have a check valve to stop freon from leaking when chaneching the low side swich?
Great insights! My chevy spark auto climate ac only blows cool air when blower is set to 1 and 2, post 2 the compressor disengages and obviously only blows hot air. Could you please help me with this situation? I have already changed blower resister controller, no luck
Great video well explained
Just have a question for you, did you test the old low pressure switch and compare it to the new one? can you test the component?? please help me out. Thanks!!!!
I'm having the same problem with my 2001 Ram 1500. Thank you for making this video.
Note: I have Sweetwater stickers on my filing cabinets like your toolbox has. 😀
Did this solve your issue? I have a 2019 ram 1500 and it's now blowing hot air at all!
@@dabeersboys I was only able to find a high pressure switch (mounts above engine), but could find no one that had a low side switch (mounts similar to one in video). It's been a year, so I should try to locate one, again. Replacing the one switch didn't solve the problem. I suspect it's the low side switch that's acting up. For the first 10 minutes while outside temperature is high, it cools properly, then air gets hot out of AC vents. On an overcast, cool day, (or on a cool night), the AC runs perfectly, never starts blowing hot air. So I believe it's a switch related problem; the unit makes very cold air when it keeps running.
@garycook5125 awesome. I was looking at mine and I was only able to find the one. When facing the truck, left front side. When I search for parts online there is only the one part that shows up. So if there is two, they must be the same part.
Mine does not blow cold ever. Good luck! I for some reason read 2021. Not 2001!
@@dabeersboys Yes, your newer model is probably different. After responding to you this morning, I located one (only one), low side switch at an AutoZone in town. My wife picked it up, and I'll install it tomorrow. This problem has plagued me since 2007 (I've been too tolerant). I'm pretty anxious to see if it works. One question: does your AC clutch (on the front of the compressor), engage when you turn the AC on?
@@garycook5125 mine is not. :(
I've had issues on my '02 Blazer with the low side Schrader port sticking open, causing me to loose full charge. On the car's I've owned I've never had a pressure switch fail (I'm sure now that I've said that it'll fail lol). Good to know you can just unscrew those, I've always thought you had to vacuum the refrigerant and then replace it, vacuum the system down and then fill it back up, but this is good to know for the future!
You do have to remove all the freon replace the part then vacuum the system down and recharge on most vehicles. His vehicle is probably the only one I've seen like that.
Obviously not all vehicles are the same.
@@MN2_Kevin_Hill_1970 no you don't not on most cars you do it just like he just did on his what kind of car do you have so I don't buy one of those 😂👍
I have mazda3. I couldn't change the switch because the freon was coming out. Not that easy.
So for anybody reading this later, they're talking about systems that don't have a Schrader valve. You should absolutely check if your ac system specifically has a Schrader valve before doing this yourself because in some cars you do need to evacuate all of the refrigerant and recharge it after, because it will escape if it doesn't have a valve. It's not only in new vehicles but different manufacturers started putting them in in different years. Do your research and be mindful that I think they can be added on to some systems, and there are similar valves on other parts of some cars, so finding a replacement valve doesn't guarantee your CURRENT **ac** system has one installed. It is not at the end of the world if you make a mistake and refrigerant escapes, but it's really bad for the environment (and therefore YOU) so if you are wrong just move away from the car and return after it leaks out. I do not recommend doing this without breathing and eye protection personally just Incase, but that's me having family and friends in HVAC and knowing little enough about cars to be cautious.
I have a 2008 Silverado with 85K and I’m having the same issue with my A/C. I’m gonna try this repair. Thanks Jimmy!
Your vehicle may have a pressure transducer
@@paullaird7944 Turns out it was a faulty canooter valve
@@Tablesaw818 whats a coonoter valve??
Tablesaw818 do you mean canister valve ?
@@Tablesaw818 i love how nobody got your joke… but in all seriousness, did it fix it…???
What a brilliant video. Subbed thankyou very much.
When the ac was not working. Did it make the fan stop working as well when it comes on with the ac?
how do you know if the high or low pressure switch is bad and are they the same switch too?
Yeeeeessss! This has been my exact issue in my 04 2500 HD. Will be trying this soon to see if the random crazy ass hot air that is completely random stops.
I have an 01 marquis, my accumulator cylinder is similar to this gm. I recently swapped everything and hoses but the switch as I lost the new one I ordered. I recently charged it, pressure held for less than 30 min. I checked the lines and they are tight.
Bought another can of r134a, charged it, drove it, checked the engine. I heard hissing by the accumulatior and noticed a spray leak where the switch bolts on, I checked for tightness which is t was, then removed it- hissing stopped.
Im quite sure I isolated the leak to a $15 cycle switch which comes as a relief. Im ordering another.
My compressor is good still as it kicks on and off with varying pressure.
My question is:
How common is a refridgerant leak from the cycle switch?
Do I need to evacuate refrigerant first before I remove pressure switch on 2005 equinox ?
Thank you for this video. I ended up getting a Napa brand pressure switch because they were out of the genuine GM part, had to buy O-ring separately but no big deal.
wht size o-ring was it
Great information thanks brotha.
I have an 02 sunfire. Reading code p0530 but the ac still blows cold. Should I still replace the part??
I pray that u have solved my problem. I have the EXACT same problem,(2010 chevy express) I replaced the low side years ago, now it randomly burst the refridgerant out of the compressor valve.. and I've literally replaced everything else and blew out the lines. but I don't get ANY pressure on the high side when I put gauges on it. just replaced high side switch and it's working again,......well see tomorrow
Okay I have a 2016 GMC Chevy van my question is my Freon leaked out I seen it leak out so I went and I bought some sealants and more freon to put in there I bought the two cans with the gauge on it so I put them both in there and everything was great for a day and then in the morning I was sitting waiting idling and the same thing happened I seen it leak out I could see the liquid or the mist and that was that now believe it or not it is still cool in my van pretty cool my question is why is this happening any advice would be grateful thank you
How can you find out what size the o-ring is?
Great information thank you so much
I think you should have checked the clutch or relay. This parts cannon video isn’t the end of the saga. Guaranteed.
If clutch cycles on and off it’s a good sign the Freon is low small amounts do leak out over time. If nothing happens but the clutch works jumping out the clutch relay then it’s probably a bad AC pressure switch the PCM won’t ground the clutch relay or the cooling fans relays if the pressure switch isn’t sending out the voltage the pcm wants to see
I have a 96 izusu oasis same as 96 honda odyessy, my front and rear ac blows ice cold but after a few mins the front starts getn cool than ambiant temps but rear remains ice cold, their are no leaks no compressor issues, yes compressor is still running while this is happening, what could be going on? And yes frigerant is at proper levels
Nice thank you for the information ♥️
I've fold the problem of cycling on and off is usually because the system is low on charge. The pressure sensor is telling it to turn off.
I have a 2014 Chevy silverado 1500. I have code P0532. What should I be looking for. My air conditioner doesn't get cold, and the fan on the motor is loud . My gouges look normal and don't show signs of overheating.
Should I have to switch the refrigerant pressure sensor?
I like this guy, I’m subscribing 👍
Do all switches Have a shut of valve
In my Corolla it was a bad radiator fan. You hit a bump or give it a manual spin and it would start turning and the AC would kick on… even if it was barely turning. Driving would move enough air to make things ice cold, at least until you stopped.
Hi, mine is Ford Fiesta 2011, 1.6S with 20,000KM on it. Lately, I noticed that the AC compressor is not cycling off at all whenever i turn on the AC.
Do u have any suggestion what to suspect ? I live in Indonesia with outside temp is like 30-35 degC. Thx
Hi sir. The high pressure switch should be close when checking by multimeter . But my dodge caravan 1999 bought 5 high pressure sensor still not working. .check it by multimeter had 6 thousand ohms even thought put on compressor air does it is wrong part ? Thank
I have a 2001 Chevy Silverado 1500 with a 5.3 L motor in it my air conditioning just stopped working I usually do all my own work and if I don't know how to do it I come on UA-cam to find out how to do it I'd like to know what your suggestions are to fix this issue I would test it off and on during the winter and it would work so as per 2023 I want to turn it on for the hot weather and it didn't work anymore
I have a 2006 Chevy Silverado 1500 with 140000 on her and mine was doing the same thing after doing some homework I decided to replace the actuator door being my truck only has 1 and the part was cheap as well but so far that seemed to fix the issue.
I wanted to also add when this problem would a cure I found that turning the motor off and restarting the motor the problem went away and my ac would work again but now since the new part is in all is good .
Was your ac making a clicking noise as well? I have a 04 Tahoe that occasionally blows hot air on the driver's side.
@@paulieglockzz actually I'm not sure but it did seem like the ac compressor was still running but no cold air just hot air when this problem would acur.
does that work for low cooling when car is in idle?
Is it the same part for a 2002 Yukon Denali xl
I’m hoping you can answer my question. My AC does do what you said on this video. But it also has a squeal when I shut off the car. And no one can tell me what it is. And it only makes the Squealing noise when the AC is on. Helppp plz.
my 08 5.3l envoy ac shuts off hot air if I shut off vehicle and restart it kicks back on haven't thrown manifold gauges yet but just curious
May you please tell me how you knew it was the pressure switch and not the expansion valve? I am having the same issue. Thank you
The part is cheap. Just replace it and see if it fixes it
Do you know what trim level your Envoy is? Btw I drive an Envoy with 315,000 miles and it still runs strong.
05 ENVOY Xl SLE, 222000 daily driver work TRUCK. the motor not the dash tells me when to change oil. 3000 miles avg.i begin to think it's finally going to have problems cause it doesn't feel right , no light or codes. Change oil and the doesn't feel right goes away. Just typical maintenance on high milage vehicle. No where near the Tahoe nightmare previous daily driver when wasn't working on it.
I have this problem currently on my 08 Envoy. Before finding your video, I replaced the low pressure switch. Unfortunately, I still have the same problem. I honestly believe it's the high pressure switch and I am having problems locating it under my hood. I was hoping your video would have at least covered the location of the second switch ad it was mentioned in the video that if replacing the first could possibly not fix the problem. Any advice as to where I can find a diagram or a picture of the location to help me out? Thanks in advance.
I know it’s been a few months but I’ll respond to your question.
It’s usually down on the refrigerant discharge line pretty close to the compressor. That line goes straight from the compressor to the condenser coil in front of the engine radiator. Some have only 2 wires like the low pressure switch in this video. Some of them have 3 wires and are called a pressure Transducer. Transducers convert a pressure reading into a low voltage electrical signal that a computer can read. The HVAC head unit or controls have the “computer brain” as part of that piece. So it decides based on a number of temperature and pressure readings how to keep the HVAC system running close to the temperature you set it to. Those have same the simple to replace design with the valve core inside the pressure fitting that it mounts to and O ring to seal up leaks.
Hey hey buddy, I’m having severe issues with my truck. It’s a 2010 Chevy Silverado. It has no low pressure switch on the Cannes. I can’t find a low pressure switch but my high pressure switch is coming off the compressor off the small line it might be the same thing for your envoy because the years run similar check there takeoff your passenger front tire, takeoff the fender wheel well and you’ll see the sensor right there. That’s how it is on my truck.
What transmission does the suburban have? How does it shift and any maintenance done on it?
Suburbans are all 5 speed manual transmissions......
What if I bought a A/C compressor that didn’t have the pressure sensor on it like the original A/C compressor did? Where can I find that sensor?
Well spoken video
Great video. I replaced the low pressure switch, but this did not seem to solve the problem. Where is the high pressure switch located, and can I replace that?
You "can" replace both but they're not always both accessible/easy to reach. Find what your replacement switches both look like; they usually both have round silver hookups and the rest is black. typically the black portion on one is flatter and elliptical/rectangular (in my case low), and the other is circular (in my case high).
Thank you man! It’s not working great 👍🏻
My honda accord sometimes does that,but turning off the A/C for 2 minutes the cold air comes back,It's been like that for 2 years now,Could it be the pressure switch?
Great video, thanx.
I have Impala 2015 and I almost face the same issue maybe. No gas leackage found, but the compressor goes off for a very long time then its on again and off again, so annoying. This only happens in summer, but I noticed no issues in winter time? Do you think the pressure switch can resolve the problem? Some the videos suggested replacing the control valve of the compressor. . Any suggestions ?
Same issue with my impala
Did you found the issue and fix it?
@@thelastbanana0678 Not yet. I need to take my car to an a/c service workshop, but driving in this heat without a cool a/c is another story 😧. Will try to go today maybe.
@@adelalaiwi I will change this pressure sensor If it work then it's good if not I will change the AC control valve it's do the same symptoms
@@thelastbanana0678 yes I totally agree with you, those two parts are the main cause of such problems. Let them check level of the Gas (freon), it causes similar issues when its high or low. All the best bro.
Best video on this topic
Thanks a lot 👍
Thanks like your Chanel. my daily driver work truck is 1999 2500 sub. Runs like a champ, odometer just hit 200.000 Of course, i've replaced just about everything under the hood Spider injectors Radiator alnator starter. Replaced head gaskets. Had the heads machine, new valves, valve seats
My wife's car is 06 envoy .I'm having Similar problem
Had similar problems that you've had with both vehicles so can relate. Thanks much for your time and efforts
Thanks. My car would work fine below 85 degrees outside but when above 85 degrees ac would blow hot air and cut off compressor. High pressure switch.
Thank you so much for the video. I have an 04 trailblazer when I have the AC on it stalls out at traffic lights. Somebody told me to replace the switches that you were talking about. What do you think?only stalls out when the AC is on
I have (or had) that exact same issue w the exact same vehicle. "Oil pressure low. Please turn off vehicle." on the dash?? I dug and dug trying to find the problem. Eventually an O2 sensor crapped out and went into limp mode. Since replacing that I haven't had it stall out. But, I don't think it was the root cause. It still drives sluggishly and doesn't get very good acceleration.
Also had to replace a low beam headlight relay around that time.
One thing I found was the oil pressure sending unit, which is just a little screw on piece, but requires a specialty socket. I never did figure out what might have been causing it. I think I have a ground fault or a bad fuse somewhere. Almost every time I turn it off there's a buzzing noise coming from the OnStar speaker next to the driver side door. And my AC is out now after getting it charged and tested for $160 two weeks ago...
Did you ever figure out what was causing yours to stall? Mine frequently stalled while sitting in park, in reverse leaving a parking spot, or right as the light turned green lol. Commonly, but not always with the AC on.
@@terrapinflyer273 my low beam, headlight relay blows that once a year AutoZone by the first one for replacements, as far as the stalling out, it did have to be last week and get stuck in the middle of the street towed it to my buddies come to find out the battery terminal leads I guess a little screws, and all the cables to the battery were stripped. I’m not making a very good contact since I replace them it runs like a top. I don’t know if that was a problem but it’s running pretty good right now.
Correction. It stalled out again today
How to know which one is broken? The low pressure switch or the high prrssure switch?
Does anyone know what the thread size and pitch for this sensor?
On my 98 blazer the pressure switch in unplugged and the connector piece from the harness has a paper clip inside with electrical taped over it as some sort of bypass. It was like that when I bought it. I had a vacuum leak from a few deteriorated lines that I replaced. After replacing I noticed a weird sound when I turn on AC or Defroster. The ac clutch plate is not engaging and when it does it sounds real loud. If I turn the regular air on the sound goes away immediately. Not sure what to do
drive it into a lake....
I have high pitched squeal that gets louder when I accelerate. The sound is only present when I turn the accelerate on. I've justreplaced the belt and alternator on my pontiac g6. Do you know what it might be?
check for a small child caught up under the engine....
Well, I like simple Solutions and even more of they are a cheap ones!. I have a liberty Kj and I changed that a/c cycling switch 4 years ago....i had the same symptoms than your truck. Two weeks ago I'm facing the same problem.... So, i will have it changed again.
My pontiac grand prix AC doesnt work well when its hot out. It blows hot air for about 10-15 minutes and then it will all of a sudden blow ice cold. Only happens really during summer. Thoughts? @1Road
Weak compressor douse it work cold at higher rpms if soo the compressor is weak and starting to go out
Would you be able to hear a compressor or something kicking on when its blowing cool then kicking off when it starts blowing warm .thats what my ac is doing....does this aboutbevery 10bseconds or so at idle
Got a 2001 s10 doing same thing getting new part tomorrow thank u I was thinking it was that part to
If this is faulty can the compressor not come on at all? when I jump the switch the compressor kicks on. but won't kick on at all other the hot wiring it quick. the freon level checks out good with the ac kit I bought
Yes this how it all works the PCM computer looks at the pressure switch and it wants to see a certain voltage most work on a three wire set up ground power and signal. You should have either a 5volt power or 12volt power and a 5volt signal and ground be 0volts. When the pressure gets low or the switch is not working properly it sends a signal back the the computer if the computer sees a good signal voltage it will ground the Ac clutch relay and the cooling fan relays and boom you’ll have Ac. It’s a safety switch so the compressor douse not get damaged with low pressure in the system
Salam to All,
I've been suffering from this quite some years, replaced thermostats and heat sensors and even ECU, but still the problem as Frank pointed randomly occurs, I question the symptoms to be clear on the solution:
The temperature gage goes off, and the AC stops cooling and air is hot amd moist, the AC will never work till the bettary is disconnected (car reset) or errors cleared with ODB2 device, is this symptoms you've been facing ? I ordered the part and will try with the pressure gage as a last resort, as I tried everything,
My car is the beautiful GMC ENVOY 2006 4.2L
Thank you for your video, please advise if the same symptoms occurs..
TY... straight fwd & easy!!! ;
I have a 2016 chevy colorado. At about 50k it started randomly blowing hot air, but would always blow cold again after five or ten minutes. It seemed to progressively get worse and eventually stopped working altogether. I took it in and was told there was a leak in one of the pressure fittings on the hose. That was replaced and the AC worked again for a while and then stopped. I took it back to the same place and now they tell me the condenser is bad and needs to be replaced for $1,400. Is this making sense? Do you think it's possible this pressure sensor could be the issue? Is it worth trying, or just trust the professionals and replace the condenser and drier?
It's usually cheaper to just replace something small like the sensor switch and see what happens. A/C is complicated, and troubleshooting by itself can get very expensive, so try the easy fixes yourself first. (I have the same problem.)
I have a 2015 Chevy Silverado and for what I been looking at is those condenser are junk mine just quit working as well you tube condenser in that make and you'll see what iam talking about
It could also be blend door actuators.
Does 2007 honda pilot have build in cover after taking out the pressure switch because I’m afraid that the refrigerant might spill out if it doesn’t have a cover.
count to ten, think about puppies & rainbows. cross your fingers, have mommy kiss your cheek, and then put on your pants.
My 2012 Camaro work at idle but only sometimes at high speed, what could me causing that problem? Already checked the freon levels and they are good
Thanks so much. I just swapped this switch out, and it seems to have fixed it.
My sierra wont get cold while at highway speeds, granted its hot here in az. but it did eventually get cooler when I got down to 30mph and if just in town driving it wont get cool enough.
Where can I find low pressure switch on my 2010 1500 Chevy suburban? It’s not located at the accumulator
What will keep my compressor from kicking on I got a $3,800 series 2 Buick Park avenue when I tried diagnosing the low pressure switch I put a piece of wire in between you know bypassing it and my fan kicked on but my clutch didn't engage on my compressor but when I hardwired my compressor to the battery it comes on and blows cold
cool tks Jimmy great vid
hi i have a pontiac g6 2008 ecotech and all the sudden ac not working and temp guage went flat all relays are good and no codes any ideas
When engine hot and hot weather ı heared click and click compressor sound AC off itself is this cause Pressure switch ?
Low side usually go bad before the high side? Are they interchangeable? Or it’s the same part?
Did u replace only one ? Why did you only replace one and not both ?