It’s Easier Than You Think To Keep Your Cars AC Cool!
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- Опубліковано 19 чер 2024
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Today our host Jared tears into the 2004 Cadillac Escalade ESV that he got for a great budget price, and tries to make it cool! With the heat of the summer, its not fun to drive for him or the dogs! Jared goes into a deep dive explaining how your cars AC system works to help prepare you to tackle your own repairs!
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HVAC guy here. The compressor definitely does not compress the gas to a liquid. That happens in the condenser. The compressor turns a low pressure gas into a high pressure gas.
Also. Pro tip. Purge your lines as you connect them to push the air out of the lines. Air is a killer in the system.
Good clarification, I should have made sure I got that more accurate.
Curious since you specialize in Toyotas. I have a 2005 Lexus Rx and have a weird issue with my AC. It works perfect roughly 50% of the time. It blows nice and cold but then the AC will all of the sudden one day start flashing and it wont blow cold air. Next time i drive or two fine. Then off again. Really weird. @@TheQuestionableGarage
Was about to say about purging the line. R134a is a blend of gases and is no good for the atmosphere (has a GWP rating of 1430) - needs charging as a liquid to prevent the glide.
Right? Always remember gases compress, luquid doesn't.
I just started on my AC project, I took the compressor down to a local rebuilder and got completely schooled on AC by 2 Asian ladies. I'm converting from r12 to r134a so I have a little more work to do than just fixing the existing system. It was such an incredible experience to learn from them and I am very excited to record and share what I learned from them.
I just bought a Tahoe with this same exact problem. You’re a life saver Jared
thing to note with A/C sealant - not only will it clog the system but if you decide that you need to go to a shop they will not work on the system cause it will clog their machines
As I learned a few months ago, if you use UV Dye to diagnose your problem shops will also refuse to drain your system. My 17 Tahoe condenser had a lovely crack in a factory weld(common issue) 🤦♂️
@@charlesm6797 Nowadays the UV dye is combined as a compressor lubricant too, as long as you use the correct stuff and won't pose a problem with draining and reusing the refrigerant. The correct stuff is quite expensive and require a special caulking gun and tube of dye lube with attached AC-quick-connector to fill the system and is usually done by the pro's when fixing the system for showing future leaks.
Don't forget when evacuation it does that boil the moisture out and helps add refrigerant, it also removes the air, air is compressible and gets hot too and well like can self ignite if it gets to that point but it doesn't have any properties of refrigerant other than its a gas. All it will to is greatly hinder the ac system and still bring moisture in. You just only want refrigerant and that's it. I took ac at my local college i had so much fun there, loved every moment of it. I'm actually doing my AC on my Sonoma X3 the compressor died in a way and well need to replace everything now it holds amazing vacuum to so happy for that if the compressor isn't dying tho. just waiting for my compressor annoying enough and it's been a week.
My neighbor has an '04 Escalade with the same issue. We did the blend door, and like yours the new one didn't work. Call me strange, but I immediately went to the wiring and found a broken wuire in the harness under the right rear door. Soldered that a d viola! it now works.
To look cool, you have to be cool. Great timing. Today's real feel temperature is 111 degrees, and my nephew said his A/C is not blowing correctly.
come to midwest feel like is 66
@@onemansvideos2134 I'm in New Hampshire praying for a thunder storm
Actually I have to do it on my Yukon, this video is going to make it easier, thanks Jared! 😊
You can do it!
@@TheQuestionableGarage Have you ever tried to switch the engine off and on to make the ac work for the back? It sometimes work for me so I don’t know if it’s the actuator or not, but it’s a cheap part so I might as well replace that
R1234yf is supposed to be more efficient and less susceptible to corroding metals. Allowing for thinner/smaller condenser/evaporator core. Mostly from a manufacturing standpoint less material=lower cost. The truth is, they are lying to us. It still corrodes metals, and it's not really more efficient. Most systems I've worked on is now R1234yf, I've never done so many evaporator cores 😅. Wrenching for over 15 years now.
Since I replaced my ac compressor on my 2009 Ford Focus it still doesn't blow cold air or even turn on unless holding the connectors together 😅
You should purge the yellow line using the Schrader valve under the cap above the yellow connection. Turn the can upside down and press the Schrader untill liquid sprays out. You need to do this each time you change cans.
Don't need to use the Schrader valve, just crack the connector he used to connect the hose to the gauge manifold and then tighten when you get liquid.
Very timely, informative and inspiring episode, Jared! The A/C in my IS300 SportCross died and your easy to understand explanation of how A/C systems work will be very helpful in my quest to fix it. Thanks a bunch and keep up the great work!
Pressure switch in AC dryer/accumulator is not used to adjust anything. It's an on/off switch that turns off the compressor (thereby protecting it) if the refrigerant pressure gets too low.
Be sure to purge the freon in the fill line before you pull it into the ac system. Having a big air pocket in the system can cause cooling issues to.
Thank You
The shraeder valve on my low side and high side both failed on my Suburban (front/rear cooling). Replacing the low pressure was easy, just took out the bad valve and replaced it. The high pressure valve required the purchase of a new one since the valve was enclosed in the body of the enclosure. This vehicle requires 48 ounces or 3 pounds of freon to fill it.
Great content, very informative video. Awesome job on the repair! Keep up the phenomenal job cranking out banger after banger Jared!!
So my 2004 Mini finally got to the point where repairing it wasn't worth it anymore late last year. Traded it on a 2012 Nissan Pathfinder and it has similar multi-zone controls. Thanks for this video. If I ever have any issues, I know where to look.
Questions about the procedure with the guage set. When reading pressures, do you need all 4 valves open, or just the two at the lines? When filling, do you need to close the high side valve at the line or just the high side at the guage, or both? When pulling a vacuum, does the engine need to be running or can it be off? I've always been curious if the pump or something would prevent the whole system getting full vaccum. But also think running the system without anything in it would be harmful to it. Thanks!
When reading you need the valves on the manifold closed, otherwise they would cross over and show a ‘balanced’ pressure. When filling you need to close the high side valve on the manifold so it only goes through the low side, and when pulling vacuum have both valves open so it can catch the entire system.
On the escalade you can use a scan tool and scan it and itll tell you also if there is a blend door issue
I am legit having ac issues with my avalanche and was going to start looking at it tomorrow. Perfect timing!
Glad I could help!
You can not do your own aircon in Australia it's a licensed industry here.
Rear air uses an expansion valve. It's a bit of a btvh to change. Just hope your front evaporator isn't clogged.
Glad to see you back from surgery. So helpful and entertaining. Thanks Jared.
Perfect timing. I recently attempted to retrofit one of my old civics to 134a, and managed to blow the high pressure relief valve on the compressor because I unintentionally over charged the system
Me: wow how tall is he?
2 seconds later: we slammed this GMT to the ground for the dogs
😅😂
I’m still 6’7” but yea not quite that tall!
I went to tec school for HV/AC and you did a good job
Folks with 2010-2020 Nissans with no heat or cool when changing the dial, it’s probably the blend door bore that is cracked. Remove the stepper motor to verify. I’ve repaired one and saved my client $2700 replacement at Nissan. And there’s a video. 🛠️
When the high side pressure is too low, the compressor won't kick on. The compressor usually kick on below 150psi.
UV die is glorious. Helped me find a leak on my 2015 Triumph motorcycle.
....Turned out to be a leak in the casting of the cylinder head...
dye not die. nobody died here.
Just a couple points to add: the ac is not a consumable. The freon is reused. This helps with women, and men who don't understand. Also when adding freon the can will freeze making it harder to add. Freon is a gas, it does not flow as ice. Also you really do NOT know what the temp coming out the vents will be. The system does not work that way. It lowers the temp. 25-30 degrees, but then all the vent hoses ect. will warm up the air as it passes through them. Had to explain these like a million times when talking to customers. Hope this helps.
I have a 04 Escalade. The front AC blows cold 🥶 the rear about a year ago began just blowing hot so I keep the switch in off position for the rear. I assumed it was a bad thermostat switch located above rear view mirror for the rear AC and heater control. The blend doors actuators! 🤯 I’m assuming each side of the car has these in the back?
My 14 tahoe ssv blows cold front and rear but will turn the recirculation and ac off when i come to a stop. Not just stop blowing cold, you can watch the lights turn off. When driving its ice cold. I dont know what the problem is
The explanation and visual aids are great!
12:14 forgot to talk about static pressure while off
I go over it in more detail at the end in a white board setup!
I hate it when it just falls out like that?😂
nice presentation Jared.
Thanks!
Red Angel is a legit A/C leak stopper. I have seen multiple people use it without issue. But I would still use it as a last resort if you can’t find a leak
ive done a compressor on most cars ive owned. its ez. now evaporator where you have to tear the dash out can be a nightmare...
Jared, since the computer is bad and you need to go back in anyway add a lever to the blend door arm and a small vacuum bulb from a cruise control. Then you can run a small vacuum line to a mechanical switch or low voltage solenoid so you can switch it like the good old days of all one or the other. Even a mechanical lever like a lawnmower throttle can give control without disassembly every other season. A 3d printed arm and bracket wouldn't take much to design and print.
Probably the switch for the rear ac, like the knob not the actuator
You should have bled the air out of the line between the freon can and the gauges. You introduced some air and water.
Vled? What is vled? Not a word. Try again.
@@chrisforte8229 bled, sorry typo, guess you are perfect
I think this video will help my buddy with his Tahoe, just sent him the video.
Its always nice to see this stuff. I learned a lot thanks man. This is what I mean when I say you do you man.
I appreciate that
@@TheQuestionableGarage Damn right Brother. I got you man. Just showing the Love.
New refrigerant…..the 134 patent ran out.
like number 26? WOW
thanks for the quick fire A.C. Systems 101 class ❤
I personally can't buy AC fridgerant here where I live (Finland), as it's a licenced field. But I appreciate the informative video.
GMT830 Chassis: The Perfect Dedicated Pooch Cruiser.
I had a blend door fail on my Falcon!! Whole dash out job to fit a new pin for the door!!!!!
Your electric fan should immediately turn on when the AC is commanded.
Love your work as always Jared!
Much appreciated!
Autozone has Loaner vacuum pumps and manifold gauges I have used them on cars I rebuilt to vacuum and recharge the AC I couldn’t survive without AC idk how people can do it
I want to put that compressor in my Vaper Hone!!!!!
the new stuff is flammable cuz it made with propane
HVAC tech here. This is false.
😂 nope
man.. ur one Punny guy!.. and now ur even Cooler! Win Win!
Jared, on your manifold set, isn't there a low pressure side connector so you can hook up the can there?
I also had to go through a bit of a learning curve with my AC on my 5.0 Ranger swap. Wound up replacing all the parts since the ones that were originally in the Ranger (and I could still use) were 20+ years old. AC now works, and gets extremely cold, of course the cabin of the Ranger is just a wee bit smaller than the Escalade!
PUPPIES!!!
Best refrigerant?
Propane!
R290❤
R-290
Mustard gas? Huh, never knew.
more specifically, phosgene gas.
Lmao, I don't remember that in the ASE test for the refrigerant. Learned something new today, cheers.
I replaced an AC fan, and the new fan spun the wrong way. It was cool at stops and nothing while driving. Swap the wires and now it works fine.
You should do the chrisfix headlight special. Those are looking a little foggy
Did you purge your hoses before charging? If not that can push air and non-condensables into the refrigerant circuit and cause issues down the road
Great episode 😎😎
Since that actuator is just a small motor and some gears, have you considered either pulling the motor from the new ones and cleaning & greasing those plastic gears. You're too close to a full fix to stop.
My car seems to do the opposite of how it should work, like if I leave just the fans blowing it gets really cold but if I turn on the A/C it doesn’t… any light in how I can identify the problem?
high pressure side can also ice up if the evaporator fan or AC fan is not working or if the evaporator fins are dirty. ps(the "scientific term" he didn't say is "state change")
Thanks to you clearing that up Professor. Your students will be proud.
I have an '04 Grand Marquis and right now it gets cold while sitting still but gets warm when I start to drive. Any idea?
Great video. Thanks!
You're welcome!
@TheQuestionableGarage Going to be moving your way later this year from Lake County Florida. Can't wait!
Not sure if my info is just old, but my AC instructor in school (mumble mumble mumble) years ago told me to never shock the compressor by dumping liquid freon into the low side by holding the can upside down. Has that changed or have you never heard that? I'm not judging, I'm curious.
I should have brought that up, if it’s a totally dead system you wouldn’t want to do that, but in my practical experience I’ve not seen an issue with a charged system working.
@@TheQuestionableGarage This actually comes down to how close your low pressure port is to the compressor suction. Your caddi's port is upstream of the evaporator so far from the compressor, but one should look and ensure the port is not downstream of the evaporator and so too close to the compressor.
@russmanhi ok that makes sense. Say if your low side port is mounted directly to the compressor like those old Ford piston compressors, or some of the ones on industrial fleet trucks where they mount straight to the rear of the unit.
Yeah ... Nah - this rear air (aux ac) does not use resistors for to control the speed of the rear fan. I don't think resistors have been used for years. That box is a voltage modulated controller for rear fan.
I was having an issue were my ac would kick on and off when I drove. Now my compressor doesn’t kick on at all. I replaced my low pressure switch and add Freon and now my compressor doesn’t kick on at all but the clutch spins freely. I don’t want to through parts at it so I want to try and diagnose the problem and not replace the compressor, lines or dryer without first trying to figure out what the issue is.
Some vehicles you can use a paper clip on the pressure switch plug to engage the clutch manually. If it works, the refrigerant may be too low. 🛠️
So i almost finished my project car, just few things to get throu after over a year not running so i got cold almost got healthy again went carting with my friends and got cold again. 😅
But i bought coilovers for that car so it's all good 🤣
Not good to diy ac work. Every pro shop needs to properly purge the refrigerant before even replacing o rings, condensors, compressors, etc
Sorry to be picky gents but, 1234YF is only slightly flammable.
i traded one of my projects for a pickup with ice cold a/c
Will the orifice tube make your compressor not kick on?
what does it mean if the ac clicks on and off quickly? I added refrigerant but still no cold air
You may have a clogged oriface or expansion valve. The pressure gauge tells the AC clutch when to engage and to cut off based on pressure. Don’t add more until you find the clog. 🛠️
I can't drive no License also Iam 65, but I watch a lot of car channels on UA-cam, Aswell as the Miliary and War channels.
How about when the clutch is replaced and it still buckles belts?
Bad compressor bearing(s). You can use a long metal rod, screwdriver, as a stethoscope and listen if bearing are noisy. Or take the belt of and turn the compressor by hand. Car off and let the engine cool down. Test your other pulleys, water pump, ps, alternator, units that belt turns.
Being an owner of a Great Pyrenees, I need you to make a video of how you keep yours white!! 😂
I guess I’m lucky, they will get totally covered in mud, and then once they dry they leave the dust all over the house and their coats come clean
@@TheQuestionableGarage Mine LOVES to dig and burrow, so she will end up covered head to paw in mud, red clay and other debris... Which means she turns solid black. 🥴
U forgot to purge your yellow line before charging it
I gotta find an AC kit with dye so I can check for leaks in mine
O’Reilly had a huge selection of options, they are my first pick, but most any parts store should have one!
@@TheQuestionableGarage I used to favor Advance Auto Parts but since O’Reilly opened a store close to my house a few years ago, they’ve become my go-to
HFC is 134a, CFC is R-12
You're electric fans should be running when your AC is on. I didn't see a dedicated condenser fan.
My AC doesn't work because all the components are in a box in my garage. Simplify, add lightness, and remove comfort.
I understand the value of simplify where possible....
But these days...AC......i prefer it.
When you start to get older, you'll want your AC.
Fast isn't comfortable, and comfortable isn't fast.
Please stop calling all refrigerantes freon. Its the same sad thing that happened to qtips and kleenex. HVACR guys like me get triggered 😂
So... I lost my belt for my AC. Is the compressor seized if I can't turn it by hand?
Most likely. Or the clutch is seized. 🛠️
Like what Hammer said, most likely the compressor has failed, or the magnetic clutch assembly has failed and is locking up the pulley
@@TheQuestionableGarage fellow Georgian here. Thought I’d help out.
Thank you! I had 2 different shops quote me $3,000 on a high mile 2012 focus for a whole system replacement 🤦♂️
@@treyreppe4348 Those shops won’t warranty it without replacing everything due to contamination from a potential compressor failure shavings. Replace the compressor and clutch, dryer, and oriface, O rings, flush the lines with brake clean and air, use the tools Jared featured, and you should have air again. And all for probably a couple hundred doing it yourself. It’s not hard, just do it one bite at a time. 🛠️
A/C at my age is more important than horsepower….
No one is faster than bots
Purely on the title, i agree, but still, it's one of those systems where i call "the guy" and he can mess his head with it. Don't get me wrong, i do everything else short of panel beating and paint, but AC work... if you're lucky, suffice to say that you just want to nurse an extra beer. If you're unlucky, chasing gremlins is more than just the title of your memoirs.
Still is worth understanding how it works so you can have a chance to identify a simple issue.
Mildly annoyed you’re not sponsored by anyone, seems like a lost opportunity to market folks like me.
I ONLY see ads in sponsored content.
Here’s a tip, set up a OLP (Optimized Landing Page) with a deal on the product demonstrated.
Smooths the process, and you get specific stats
These take like an hour once you setup the CMS template.
Everyone is a winner
Marketing plan done.
Now sponsor this guy
As far as inserted sponsors I decline a good number of them. I could certainly use the income from them, but if it isn’t a product or brand I personally would use, I won’t advertise for them.
@@TheQuestionableGarage well that’s why the endorsement is valuable.
Maybe sell brick shaped hats? ;)
Are those gold Trump shoes.....🇺🇸🇺🇸
:)
38:50- professor jared explaining to us students on how to wrench 🔧 everyday..
😊👍👌✌️🫡😄👏👏
Sounds like a guy could drill a small hole in the access panel and put a lever with shaft over the blend door shaft with a sharpe, winter and summer on it like my home ac unit and it’s vent door. Time well spent and money well saved. I love manual fixes. That would save you pulling the panels every hot and cold season. Love your content! Thanks for sharing!
Looks like the harbor freight tool. The ac pressure check thing .
Take it from me, if you can crush up some ice as fine as you can. Then add distilled or clean drinking water into the ice. Don't float the ice and pour off ant excess water on top.
Stick your tgeromert in there and it should read 32°F. If not usually there is an adjustment nut on thr back of the stem. Check in boiling watet to see if you read 212°F (+/-2.2°F) Now you have a calibrated Bi-metal thermometer.
41:35 This needs to be on a T-shirt !
Also when working on AC, check for the amount of condensate water draining from the system if it's working. Sometimes those drains clog up and the water builds up and the evaporator freezes up and the system gets unstable and stop working when under heavy load and water can start to flood inside the car.
This was a great video and very informative. Thank you. Maybe the use of a power probe to test the blend flap before ordering new parts
You left out bubbles in the sight glass and pressure willl change as the expansion vale opens and closes