How to know if the TXV is Bad?
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- Опубліковано 9 лип 2022
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How hvac technicians diagnose bad TXV problems in the field?
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How has the TXV failed?
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Bad Indoor TXV - Air Conditioner Freezing Up
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#hvac #txv #hvactipsfortechnicians
Hi Taddy my name is Valentin Matos from the Dominican Republic living in Chicago and got into this HVAC-R field and got problems with TXV but Thank so much, that info was very helpful and now my mind is opening more about TXV, God continue to bless you along with your family and use you for the good of others
A simpler way to check the TXV is un plug the condenser fan. As head pressure rises the suction pressure should remain stable.
Thanks Joe it's a great idea
I was gonna recommend this same procedure as its a sure fire way to test for a bad txv
That's awesome Chris thanks 😊
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@R P Everything you need to know. ua-cam.com/video/Uh_9S7v4nz4/v-deo.html
Hi Taddy, I'm an HVAC-R TECHNICIAN and recently listen your introduction about TXV, it sounds great for me. Good job!
Hey Tad I'm an HVAC technician on Martha's vineyard where the business is booming!! Recently I joined a company where there are some entry level installers / techs that I'll be sharing your videos with! you Do a great job of explaining how it all works.thAnks!!
Very cool my brother paul
Thank you so much for sharing my videos
Great bro , I'm the HVACR technician and have experience difficulties with TVX on how to troubleshoot it, now you gave me a hint big up man
Thank you for making these videos. Im a multiskilled tech at industrial plant and needing to learn more about HVAC.
Thank so much, that info was very helpful
wow thanks you just solved a problem i had today with a bus ac tommorrow i now know waht to do
I wish you labeled this video differently. Three quarter of the content was about other potential problems other than txv and how to know those problems. I just wanted to watch what you advertised; how to know if your txv is bad. Good content otherwise. Always looking to learn more 👍
I'm on my fourth year as a tech. Just subed
A lot of times it's the powerhead that goes bad.
Taddy ill be starting school for HVAC in Oct what do you recommend for beginners?
air flow first.
Taddy, Tom from Jacksonville; just an old dog learning new tricks.
I mean 19 bar high side and the low side is only 2.5 bar to 3.2 bar. Added R407f but the low pressure didn’t go up , the filter seemed okay, warm on the inlet and warm also on the outlet. I already added more or less 2kg of r407 f but pressure on the low side is less than 3 bar. The evaporator is icing after like the compressor running for 39 Mindy it’s already Jason build up of ice the coil and the txt are as well
I have a problem with my packaged unit on the ship. Compressor run but always cut out on a low pressure switch. The ice on the evaporator and the compressor itself is icing too. Until the compressor stop running. The low suction pressure could not reach to to 5 bar. And run only for a Hotwire and cut out out on a low pressure switch. I added refrigerant but seemed the pressure dint go up. Remain at 2.5 to 3 bar. Even after adding R497F pressure didn’t go up. The unit is 5 kg 407f when running in good . High side pressure and 9 bar. My question is, why the low suction pressure remains low
will a stuck txv cause hi current draw?
my unit is supposed to run at 26 amps. it is drawing 52 amps
What happens if the small tube near the sensing bulb had a leakage and repair? Will the txv still function normally? To further explain is the sensing bulb a capillary pipe connected to the head of txv and a small one which is the end. That other end capillary tube was leak repaired. Can it still function normally? Thanks so much.
Smart guy!
Unhook the condenser fan motor from the contactor. The high side will go up. If the low side stays around the same, the TXV is good. If it doesn't, then it's bad.
How do you check this on heatpump and how will you know if its indoor or out door txv
Taddy! Tony from VA here! Your videos are outstanding! I find your videos to be extremely helpful. The information and experience you provide coupled with my current level of design and install knowledge help me complete the puzzle. It’s always been a problem getting the service techs to share in detail. I never understood their mindset of holding back when I’ve asked detailed questions. Your videos do that for me! I’m trying my best to up my overall game and wanted you to know your truly appreciated!!! Thank you so much!!!
You're welcome my friend
I'm glad these videos are helpful
Glad to know you have benefited and i'm happy to be here to help.
Thank you for watching
Agreed! Taddy We Really Do Appreciate your speaking ability and your knowledge!
Thank you for joining my friend. I really appreciate you being a member
Here is my email tadfuller1@gmail.com
The indoor txv is also used in heat mode! 😊 If you find a heat pump having issues with not defrosting properly, it could be a defrost switch, thermistor sensor, defrost circuit board...or it could be your indoor TXV. Three in the last 20 years went bad in the winter time. Hundreds in cool mode. Mostly because homeowners don't pay attention to abnormally high Jan/Feb power bills and persistent ice buildup on hp coil.
Dude you are super smart and I can tell you've been doing this for a long time
Have you ever thought of offering Tech Support
@RV10flyer I was told that the indoor TXV is bypassed in heat mode, and the outdoor is bypassed in cooling mode. Was I told wrong? If true, why would the TXV be used in heat mode unless the bypass is bad?
I thought the indoor TXV isn't used as thr system is in heat mode? During heat mode the refrigerant is reverse
@@realSamAndrewyou were given the right info. The outdoor metering device is used for heat but I’ve heard of one that does both. I have not seen them myself.
@@caru3257 this question remains a mystery as the commenter has not clarified.
What if you're putting a magnet on your reversing valve, and it still goes into cooling mode on a trane but runs like it's still in heating aka the condenser is running as the evap stuck reversing valve?
not sure
I'm seeing conflicting instructions on the direction of the bulb wicks. It seems 2 or 10 o'clock positions on a level suction line would work the same eitherway. My question is what do you practice in both vertical installation and horizontal installation of the bulb in relation to it's wicks?
Hey brother thank you for joining make sure you get my guides by sending me an email.
Here is my email tadfuller1@gmail.com
@TaddyDigest I received all your guides today thanks.
Just a quick question , maybe someone can help me out. suction and head pressures were low, which was an indication of a leak somewhere. Popped open panel to the air handler and started searching for leaks. Long behold good old fashioned soap and bubbles brought me to the leak coming from the txv. The valve is similar to the one you are holding, I noticed that the cap that’s seated at the very bottom of the valve was cracked and resulting in the leak . Do you suggest replacing just the cap or the whole thermal expansion valve? Thank you
I would just replace the txv
On both sides high side and low side
How could to many registers cause low suction issues? I understand a return could cause a problem.
Superheat and subcooling? Those are my main tools for troubleshooting a TXV. If I have high superheat and my subcooling is good that's a pretty good indicator there is an issue with the TXV. High super heat low subcooling - charge issue more then likely.
Very good brother
how will you know if the compressor is losing compression or the TXV is stuck open? it;'s difficult to know
Compression ratio, compressor amperage,
I have a low pressure like 20 on suction and 300 high side txv was frozen up. I 🤔 it's the problem
Taddy Bear my Hermano question for U. On a split system heat pump cool cycle is good BUT on heat with in 15 seconds my head pressure rises over 575 psi.
On both high and low does this mean it’s my condenser TXV?
could be txv
check airflow
check filter drier
first
Well it’s a dual fuel Lennox gas furnace yet my natural gas cycle doesn’t short cycle at all, works fine!
Help please I am working on a multi v5 lg outdoor with 9 indoors no errors but the out door power on but no movement at all
Support me and I'll help you
I have a question. I have brought 3 technicians to the house and none seem to find the problem. I have a 5 tons a/c and is 2 years old. I had someone change the fan. Because the other one went bad. Now the liquid line gets hot most of the time between 1-6 pm. And not all the time but when it happens I have no cold air. It comes out hot. It cooks in the night really good. I just don’t know what to do anymore. Please help
If the liquid line is getting hot that means the head pressure is too high.
Could be overcharged could be a restriction a bad t x v or could be the unit is dirty.
@@TaddyDigest thanks for answering my text . Wow too many things. I’ll start by cleaning the the unit outside. Cause I called a tech and the ac has the Freon it needs. I’ll take it from there. 👍🏻
my tech says my TXV needs to be replaced (8y old carrier unit on Long Island NY). He gave a quote of 1800 for the job. I have no idea if this is a rip off or appropriate. Does this sound reasonable or should I get another quote? Thanks
Definitely a rip off my friend
@@TaddyDigest Fastest reply ever. Thanks mate!
You're welcome my friend if you need help over the phone or through email just click to join button.
I installed a new 5 Ton heat pump , heat is ok but cooling mode suction line no pressure its going low even I add Freon , is the TXV bad ? what is the part number of that TXV you holding ?
Could be a bad t x v
Especially if you're adding refrigerant and the pressures not going out
But there are other things to check like air flow. Is the fan motor blowing?
@@TaddyDigest Air flow is good , suction line no pressure stays on suction (like walk in cooler solenoid coil closed ) But heat work ok
@@TaddyDigest I replaced TXV , now pressure is ok Thanks
Hell sir. I have a problem also with my txv which is 7tr capacity. Is it ok to replaced with 7.5tr txv?
yes
The replacement AH Coil i got had a piston instead of the txv, can that work?
Remove the piston and then just use the t x v
You don't wanna try you to use both
One issue with mine i buy brand new after manufacturer warranty
Hi, my both packagr unit dosent have txv. Ist normal ?
Yes it’s normal
It might have a piston or capillary tube
How can I watch them videos?Thanks
They are down below in the description
@@TaddyDigest Thanks
Well yeah . I was in install 20 years im new in service and im struggling with pressure issues . Low charge , txv. I dont think u were very technical on your answers
Why does my customer have heat coming out of their heat pump (102 degrees supply) when I set the thermostat to “cool”?
Is it a bad reversing valve?
Thermostat not set correctly for o or b
Reversing valve not switching
Program thermostat or rewire
or check valve
Hi can you tell me how I sign up to be a member
yes
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I do not see a join button, only a subscribe button on the right. Please indicate where on the screen the join button is. Thanks@@TaddyDigest
Make sure you are signed in
Also make sure you are on a computer. You may not be on the right platform?
It’s always the TXV 😂😂😂😳
Why is Shia Lebouf teaching me about AC's
lol hahaha
Whats it like makin out with Megan Fox? hehe
I’m sorry for my English, I have a very terrible English.
Dang bro u sure u not related to post malone?
lol 😆 😂 That would be cool
no comments lie
I think you're over-complicating your explanation.
Comments in here are much more concise to troubleshoot the TXV
You're intermixing setup and installation/design problems with "for real", component functional failures. Clogged filter, defective TXV, leaks, capacitor, compressor, contactor, are component functional failures.
If an AC has been in operation for years then all the installation/design errors are moot. You should be making that distinction in your narrative, e.g. if you're on a call and the customers AC unit's been in operation for five years then likely the ductwork sizing, piping, etc. is moot unless there's been recent work on the system to change those areas. The tech should be focused on component failures not installation problems. Those kinds of calls are most common. You're dissertation here would be very confusing to a noob, indeed.
Yeah you're right.
Very well said thank you for this
Not if you got rodents in attic destroying flex duct😭
Saying, you have to know what you were doing, is of no use at all other than to be condescending Lee simple minded as you are saying it. Knowing what you are doing covers a lot of things. One being that a person can be technically savvy at what they do, and not be a worth a flip at teaching it. Only a good teacher can have an opinion I want a good teacher. Nonsensical rhetoric comments are not helpful. A lot of possible TXV problems could come after a system has been running for a long time without any issues. Then you will see high head pressure in some cases and the clicking sound of the TXV on and off. WHEN BEING A TEACHER, DO NOT EXPECT ANYBODY TO READ YOUR MIND. At least, pretend to be teaching new people from the ground up succinctly. There is a time limit I understand however, make it count.
thanks 👍
Shut up nerd. These videos aren't for homeowners. "You have to know what you are doing" translates to "don't watch this video if you haven't even built the basics". Build the basics and come back
Too many what ifs in this video, get to the point, what if and too many buts, not good at al
HVAC is about process of elimination you obviously don’t understand our job keep your comments to yourself
Bro your videos are normally really good... But this one is not at all good... Keep up the good work but you failed here
Sorry for that
Can you please send me a video on how to read duckulators to measure the size of the ductwork?. I did ductwork at a construction site and have always watched my team leader use these measurements. I never understood how to read measurements
yes, here is a video on how to use a ductulator
ua-cam.com/video/N-186ulE_sg/v-deo.htmlsi=fb7vN9adVAKZEPPs
@@TaddyDigest Thanks, I appreciate it
Too many questions you confuse me.