Why Is This Happening All Over Again?
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- Опубліковано 3 лип 2024
- In this video I return to a call I repaired 5 months ago! #hvacguy #hvac #airconditioning #hvaclife #airconditioner #hvactrainingvideos #hvactroubleshooting #hvactechnician @ruud #txv #skilledtrades #bluecollar #bluecollarpride #aireacondicionado #heatpump #bombadecalor
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I'm a retired electrician and I really enjoy your videos. I miss applying my skills with my brain and hands to get the job done!
You are well organized, patient, well trained and highly knowledgeable and disciplined.
I miss all the challenges that troubleshooting and repair present and finding that almost every job is different.
You are a credit to your industry!
Keep up the good work...I'll be watching! 😄
Thanks
I'm not in the business, but I feel your pain. Getting new parts that are defective seems to be the new normal in a lot of industries these days.
I'm considering shutting down my business because of junk systems and parts anymore. Some of my loyal 20 year customers are getting pissed off at me because of a bunch of issues from junk replacement parts failing soon afterwards..
@@Bryan-Hensley try working on automobiles or lawn equipment or small appliances. You can’t get the parts and when you do, it’s all made in China and doesn’t work, doesn’t fit, or stops working. Gasket set for a small engine went from $12 to $35 now! I took my SS and just doing work for friends and family.
It's a huge problem with car parts. I put a new alternator on my truck and it started smoking. Took it back to the parts store parts guy argued with me and put it on his tester and it smoked up the store.
I do wonder if in this case, it really is two defective txvs in a row.
Could be some contaminate in the system doing it.
@@catfeline1530 No denying that one! Alternators and starters (I suspect) are not re-manufactured anymore, they only replace what is bad. Probably best to find a local repair business if possible.
you could have dryer particles or some type of debri from the first TXV trapped in the coils.. maybe blow the coils out with some nitrogen while you have the system open on the next TXV change out. I wouldn't use line set flush it will get trapped in the coils. I believe the flush instuction say do not flush with coils attached. I only say that because the last company I worked for had major leaks on a LG multi head system with branch boxes on a new install. instead of fixing the leaks they put a ton of leak seal in. then they found out LG was coming out to look at the system so they tryed to flush the leak seal out. I've never seen dark grey vacuum pump oil before. the branch boxes trapped the flush and pretty much ruin that 150,000 dollar system.
I felt so bad for the customer he was getting screwed.
On rare occasion, wax polymers formulate from the compressor oil and clog the TXV. A light torching of the TXV with low heat (i.e. propane torch, NOT oxy) can melt the wax and dislodge the TXV allowing the foreign particles to circulate and get captured by the dryer. Permanent fix would still be required - replacing TXV with evac/refill of refrigerant. If light torching temporarily fixes the problem, then it justifies an aggressive nitrogen purge to clear coil/lines from existing foreign substances (i.e. wax) as much as possible during repair. If heat doesn't fix the problem - it points more to being just a "bad" TXV without other foreign substances being the root cause.
If you do not need to return the warranty TXV the smart move would be cut it open and see in the needle/seat is contaminated with system debris. If it’s not and appears clean, likely a loss of bulb charge, that could be a manufacturer defect or an installation/vibration root cause. The last thing I would ever do is to replace a TXV with a fixed orifice. That style of metering control has extremely limited operation ranges. Any real load condition changes outside the narrow range will create compressor reliability concerns. TXVs while troublesome offer a much greater range of control and compressor protection.
I’m sitting in van waiting for calls to come in thank ya for entertaining me today 👍
You know, I been there and done that on Rheem and Armstrong units. TXV and leaking problems. So I have decided not to buy them for my customers anymore because of too many issues going on. I have been an HVAC technician for 17 years now and I can feel your frustration. Those units are pretty sorry coming from manufacturers. 😒 Only units I have no problem with are Goodman and Amana. 👍🏼
There are faulty parts right out of the box,many times in my years. 👍
“Flummoxed” great word.
Hey 👋 Curtis! You will get if figured out and working for this Customer. Glad the TXV is under warranty and great idea to replace the refrigerant. 👍🙏
I guess it's bad luck Curtis, i look forward to the up coming repair 👍 Au
Happy Fourth of July to you and your family🫡🇺🇸 great video like always have the same situation happened to me last month I had to change out the TX. I just recently changed it six months ago with filter dryer. Also added new refrigerant keep them videos coming great content love all your videos. Stay safe out there.
Sporlan filters for life
I find that its more common that the txv power element has lost its charge than blocked screens etc. Good luck.
Dang TXV, if you can't change to a piston, maybe you can change it with one that has a removable power head. Just a thought. Good video
Happy Fourth of July. Like Eric O from the South Main Auto Channel says, "I didn't make it, and I didn't break it." Auto mechanics get defective new parts all the time these days. They say, "If it has wires sticking out of it, get the new one from the dealer." That is because the generic ones usually made in China, often fail after a year or so, if they even work at all.
Good video Curtis!
Thanks!
I’m thinking I would start with virgin 410a and also add a suction line drier just to make sure that system is clean as possible. Go with a sporlan c-163-s-hh just to keep that system clean as possible. Or go way out there and add a drier with a sight glass to see if you see things in the system.
Put the filter right in front of the txv.
Maybe they (all manufacturers) should put in some shut off valves on both sides of any TXV so that they can be changed out quickly and easily.....without pulling the entire charge.
You mean like flare nuts? Then you may have refrigerant leaks there.
Happy 4th of July, Curtis. I hope you and Riley Enjoy some great BBQ. 👍🙏
Screen on txv
Happy July 4th Curtis and everyone
TXVs are the bane of my existence. Really looking forward to when everything has them inside and out. /s
New = Never Ever Worked.
Did you reuse the original cap tube for the external equalizer. Make sure it isnt plugged up, if it is, the txv will eventually fail shut.
Possible wax from the compressor windings breaking down going through the system I’ve seen it on walk in coolers and it locks the internals of the txv in place just a thought
Looks like the sensing bulb lost its charge that's why txv is completely closed on heating and cooling
does the TXV work in both directions?
Yes it does work both directions on heating and cooling
Well that sucks. Hopefully you get the repair so you can find out what happened. Anyhow happy 4th to you.
Happy Independence Day 🎉
Same to you
No acid but a pain in the aci d nonetheless! Think you’re on the right track replace the txv refrigerant and add one of those catchall filter driers 😊. Have a Happy 4th tomorrow too 😅. I need to eradicate some brush here tomorrow 😢 Dang string trimmer kills my back 😢
I think garbage from the first failed txv and dryer contaminated the system.... I would run 2 tanks of nitrogen through it and even put a 2nd dryer between original location and txv to trap particles before the txv
I’ve had the issues resolved by adjusted the txv superheat
Love your videos!!! And happy 4th!
At least you haven’t had to put on your wellies to paddle around like your previous commercial one. Happy 4th July.
Yeah, you needed scuba gear for that last one.
Happy 4th
Might be time for a suction drier and replace the liguid while at it........Tried those cleaners over the years and they are all worthless. Its very frustrationg!
The desiccant inside a previous dryer may have "let go" and contaminated the 410A with fine particulates. It's happened with automotive AC, notably with 2010-2012 Ford Escapes. I think your plan is good, replace the TXV and filter/dryer again and go with virgin 410A. Other techs really like the Sporlan Catch-All for these tough situations, might be worth it here.
I'd wager this is the answer. ^
Happy 4th of July to my neighbours to the south.
Happy late Canada Day.
That happend too me with in 12 months too Curtis.
It could be only filter dryer check the temperature across of it
I recommend the Sporlan catch all dryers, never heard issues with them
lol my neighbors got a new blueridge system that was installed by the flipper,.. its been short cycling all day in the 105 degree heat lol
try a can of ac renew iv had about a 50/50 success rate with it ,that thing is of the age they put corrosion inhibiters in the coil at manufacture , wrap the txv with a wet rag to try and not deform the body when brazing best of luck on the repair . thanks for showing the good and bad
Youre the man Curt!
Another very good video.
About 10 years ago, Copeland compressors had a problem with a manufacturing oil that caused TXV’s to clog. It was mostly for four ton in below, and the problem showed up within months of the equipment being installed new.
.
The solution was to add 4 ounces of nu Calgon renew product. But the system has to be running for the new Calgon to work. It takes several days to clean out the TXV with the system running., with some results being seen within a few hours of the compressor running
Great job,Curtis!
I remember this one from the views.
What type of failure are they restricted or powerless loosing charge..are you cutting the old drier a😢and TXV out of the system or just un sweating the parts. I always cut o7t the drier and bad pa4ts because when you heat up the drier it releases the contaminated in the drier danfoss expansion valves loose the po2er head charge easily seem like if you look at it wrong or let your heat off your torch flame get pointed towards it ,stainless doesn't rust but is more brittle than copper we had high failure rate on danfoss valves a couple times and I always have put sporlan valves in .let us know what value failure is when you diagnosis it
I had to work all of 4/7. But that's normal outside USA.
Rheem baby
I am pretty sure the sensing bulb has lost its charge. Being it won't work in both directions. Here's a trick hook the power head up to nitrogen. Apply some pressure. See it the unit stays running.
dryer is breaking lose dumping into the txv bubba
Compressor could be grinding apart slowly
there is a kit to change to piston,3/8 in and out .with the piston housing.
Good Video ! First You have to Find out if the Txv -
1. Lost its Power head Charge - if so - it's a Easy Fix. Replace Txv & Drier. wire tie capillary to itself to help deter cracking & loss of bulb charge. look for a Rub out on capillary.
2. is Plugged with Debris / Plugged solid. if this is the case - You Must Try to determine what is in it. Cut open txv / disassemble txv & do a autopsie. Most Likely it's Compressor oil or the Compressor Windings coming apart. Whenever i Have a plugged Metering device on anything 5 Tons or Smaller. i Just replace the Compressor , Flush the System & Do a complete Cleanup or Sometimes its Wiser to Just Replace the Unit & is Usually Smarter & is Better than Dumping Good Money into a Old Piece of Junk. if its around 10 years old or Older Replacing the Unit is The Best Move for all involved.
Have the same issue with txv's day after it was replaced
You need a little folding stool so you don't have to sit on the wet or dirty floor.
Years ago, I had an air handler that was doing that. The TXV would stick closed. I could take it off. Check it out. It would check out. I’d put the TXV back on and it would work for a week. Go back out there. it’s closed again after a week. I put on a new TXV and dryer, it worked for a week. I told him we needed evaporator, but I couldn’t get one and he needed to get somebody else. They put a new evaporator in it and quit doing it. I thought I going insane. And just like you I changed the Freon. I did everything. I even changed the compressor because it was under warranty at the time.
Try a filter dryer before the TXV bro if it’s being clogged up
I know you braze with nitrogen, so not soot; any possibility of a burr or other metal fragment getting into it? I'll bet you'd make a lot of money if you invented a self-cleaning TXV!
Have been seeing this a lot lately across all manufacturers reminds me of several years back when they had an issue with additives that they were putting in the compressors at the factory. Doesn't always work but every compressor and TXV changeout should get a can of RENEW as well.
🇺🇸 Happy 4th of July to you all from Canada 🇨🇦
Happy late Canada Day.
I am not an HVAC tech, so take what I say with a grain of salt. To me it sounds like debris got into the system at some point and the TXV valve is getting clogged. As to where that debris came from, other than a degrading dryer filter, I would have no idea.
Just pour some hot water on it and see if it opens up you could hear it opening up we used to open txt and clean it with 99% alcohol and put it back in used to work for a while and then it’s up to you
Did you put in new refrigerant 4 months ago?
No
there has to be trash in the condenser metering device,what do you guys think?
BTW, Happy 4th of July to everyone.
how about a removable pre filter ???
TRY USING A DIFFERENT BRAND OR MFG ONE THAT HAS A REMOVABLE HEAD AND FLUSH SYSTEM OUT REALLY GOOD I WOULD ALSO CHANGE OUT EVAPORATION COIL IT PROBABLY CONTAMINATED AND VIRGIN A410 good luck
would it be worth blasting/clearing the line set?
fwiw we’ve had major issues with indoor txv’s failing at initial install/startup or after a few months of operation with some fist co units we’ve been installing at a project .. some are faulty at start up and some fail after a few months.. we are considering using aftermarket sporlan build your own type txv’s if the problem persists..
What year is the unit. Happy 4th.
That’s a lot of work getting all your equipment on the roof to do the job. I did one last month changing a compressor only to find out it had a high side restriction. 32 year old ROOF TOP. I Ended up replacing with a new Rheem 10 ton unit.
That’s the type of calls that make you doubt yourself.
also looks like drainage pipe is up not down 😮
5:32 you probably didn't have it on long enough.
It’s in the compressor oil
Hi bro
If it’s tripping out on LP in both modes, doesn’t it bypass the main TXV in heating mode? Does it have 2 x txv and check valves or different to that for heating? Great video again.
Just one txv that meters in both directions
@@HVACGUY that’s a new one on me. 👍
I'm going to give you some advice that might save your life or at least keep you out of the ER. When climbing a ladder ALWAYS have a three point hold on the ladder, that is to say at least three parts of your body feet or hands should be on the rungs, never carry a tool bag while climbing. To climb properly and safely buy some 3/8" nylon rope, cut it to 10' longer than the maximum height of your ladder or ladders and install a latch-hook on the lower end. When you go to climb loop the latch end to what ever you wish to take up then take the plain end and loop it through the rear of your belt, leave about a foot of it below your belt, do not tie it off to your belt. Once you are safely on the roof remove the rope from your belt and tie it off to your ladder, then pull up what ever you need to the roof. If you need more equipment on the roof drop the line back down climb down and latch the equipment to be pulled up. Always keep your hands free to ALWAYS climb with a three point hold, your life depends on staying safe while climbing aloft. Always remember, "No job is so important and no service is so urgent-that we cannot take time to perform our work safely"
So, what about your generator?
Taking that one back
@@HVACGUY thanks for the reply.
Bad out of the box parts?
You have 2 metering devices.
Nope, just one that meters both ways
@@HVACGUY I cant see all the piping on that one,but for HP you should have another ,besides that txv.
Not very helpful advice here for you, we have a back room unit at one of our stores that I changed the txv on probably 5 or 6 times, I also pulled the compressor out and dumped and refilled the oil at one point because I suspected something was contaminating it. The oil seemed to help a bit but it still has issues occasionally, years later
The the screen could be clogged for txv. Seen that a couple times and the txv was not the problem. It was restricted in the screen. Blow the heck out of it with nitro both ways when you remove the txv.
Happy fourth of July Curtis
I think the compressor is sheering off and clogging TXV.
Also could be a reversing valve issue.
Happy 4th of July! Fireworks 🎇 Great video. Anxious to see the follow up one.
Does a txv care if you vacuum down on either side of it? Or should you do both sides.
What's the txv
Happy 4th Curtis and to everyone!
Could the compressor be failing and putting debris in the system
I'm sure when you changed the 1st txv you blew Nitrogen thru the entire system to clear the system. Maybe over time debris got loose and found the txv. Most manufacturers won't warranty a unit put in a hair or nail salon due to the chemical compounds they use. If heat pump evap coil will not be covered. Been there done that. It could be product broke or malfunctioned.
Flush with RX-11 or whatever is used these days?
Are the acid tests reusable?
Sorta
In a bind you can use the tip of your tongue on a refr. valve cap! It works. lol
@@bobboscarato1313 lol, that would be one hell of a pinch :)
@@HVACGUY Lol k.
@@HVACGUY depending on the manufacturer of those acid testers you can pry it open and replace the strip with standard litmus paper. Much cheaper
It’s funny you mentioned piston. I was just saying the same thing. I wonder if you could put a piston in that. Probably not.
don't get the same brand try an other brand
Which brand? I’m listening?
Can someone link to the original video as I can't find it
Stay residential. Good luck.
Commercial generates more money most all the time!
@bobboscarato1313 I agree on the commercial work. I have done a lot of it in the past. But if you're a hurry and get done in a short time fore get it. I have spent days even in nasty weather on the same job . Have a great day 😊.