TXV: Thermostatic Expansion Valve needed? Is it better than a piston in your air conditioner? video
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- Опубліковано 12 вер 2024
- Answer to a question I received on New HVAC Guide. A company had given him an option to have a TXV or not. I go through the pros and cons.
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TXV are not new....infact the piston came out later....and one reason...it simplified the old heat pumps which had check valves back in the 70s....I like that Goodman...for most part...kept pistons....more than most companys...and they get good seer with piston....TVX will have to be replaced at some point...and pistons will not...realiablity more important very costly to replace a TXV...
I used TXVs on commercial refrigeration & have had to replace many. Always installed piston metering device w/ my side work on home HVAC. Never had issues. Beer can sweatin’ cold always worked in old days w/ R22, R12. Not so much on 410A or the newer blends.
Those days are now gone as I’m retired. I’ll depend on the PROS for my future home HVAC needs however I always pay close attention when an unseasoned tech arrives trying to BS an old seasoned BS’er :-) We’ve all been there. Just be honest.
*SIDE NOTE: Don’t try to sell me a new system because you can’t diagnose a failed part and only focus in on your sales commission.
**NEVER trust anyone on a commission based salary! It’ll make an otherwise honest tech DISHONEST super fast!
Just words of wisdom. My 2¢ thrown in. God bless you honest techs out there! Stay safe & do the right things. It’s best to have a work attitude like every job you’re doing is for your loving mother. Always worked for me.
(SUBd) 🇺🇸
Don’t forget capillary tubes.
I’ve never had to replace a cap tube or piston in 23 years in business. I’ve replaced at least 100 txv’s. Do you think the extra cost up front, the extra .5 SEER efficiency increase and energy saved was worth spending $500-$1000 replacing that valve, along with a week without cooling? I doubt it.
I install Goodman and Mortex all the time with pistons. They work just fine, charged per the installation instructions and I know I won’t be called back for a bad indoor or outdoor txv when it’s 0 or 95 degrees and the compressor is short cycling on the low pressure switch. My American Standard customers get all txv’s and they pay more upfront. Both have a 10 year parts warranty, but labor, refrigerant, filter drier and misc are not included.
I never sold Ameristar or any other equipment manufactured in China. Thankfully IR just moved Ameristar manufacturing back to the US.
I can’t argue against any of that. However, if a txv fails with us, it was usually installed but someone else not brazing with nitrogen.
I bet. I went through 2 years of tech school in Atlanta. Been using Nitrogen for purging and pressure testing ever since. About half of my TXV failures were on my Am Std systems that were installed properly. They just were very poor quality for several years. They seem to be doing better now.
There are a lot of short cuts that “the jacklegs” use to “save” customers money. It’ll cost them more later on.
RV10 nice, just flew the Panthera, it was very fast...I have a HP with in and out TXV's of course needed on the HP, it's 20 years so far. My understanding is they are more forgiving to a bad tech who doesn't charge properly. Will they help to a point if R22 is slightly low?
I totally agree....same here...onething i liked about Goodman...they stayed with piston...even today in mid effecially units
My A/C company just replaced my TXV (heat pump Goodman GSZH50421 and handler AMST42CU1400) under warranty. The system was slowly losing Freon (410-A system). Also, the technician who did the replacement slowed the blower from med-high to med. The humidity is so much lower now in the house, used to run around 51-53 to now 44-48 and the house can keep the temperature lower now as well. I'm just a home owner, no A/C knowledge at all. When the system is running, I can hear a kind of hiss when standing in front of the heat pump (indoor part), which I'm told is the gas running into the heat pump unit over the coils. It certainly changes, sometimes it seems to be doing it more than others. Is that normal and is that the TXV doing it's job, allowing more or less to the indoor coils? Again, just a home owner just asking for knowledge from someone who understands how it works.
There certainly a sound made when refrigerant is circulating through the lines. That said, I'm concerned that you're hearing a hissing sound. I hope it's not a refrigerant leak and you're going to have more issues...
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@@NewHVACGuide It does stop immediately when the outdoor unit shuts off, which makes me hopeful that it's not a refrigerent leak. I only hear it in the cabinet when the unit is running. My air handler runs for like 30-45 seconds after my compressor shuts off (my old unit did too, is that to clear the air out of the ducts or something?), but as soon as my outdoor unit shuts off, the hiss stops. And sometimes the hiss is louder than other times, and even comes and goes. So could that be the refregerent passing through the TXV? I've got my A/C company coming over Wednesday to check to be sure. I appreciate the advice. This is a world I'm totally unfamilar with and appreciate the advice :).
TXV.. one if the biggest overratted scams in the HVAC industry. 😂
I purchased a 2 ton heat pump unit and with that unit came a piston type A-coil from an HVAC dealer. (not going to mention the name of the company) While reading over the info on the unit, the first comment under requirements said: "The indoor coil (often referred to as the evaporator coil or A-coil), must have a heat pump compatible Thermostatic Expansion Valve TXV) '. I'm thinking it would be best to send back the piston type coil for a TXV type?????" Comments or suggestions? Thanks
TXV > Piston
Better efficiency. Better performance. Better comfort. Better dehumidification
@@NewHVACGuide Thanks Josh! That answers it!
enjoy you video
Looks like some sort of piston orifice on a 13 seer ameristar from the factory. Does that get removed before installing a txv or leave it alone?
Very informative, I bought recently a Goodman GSZC16241, with CAUFA2922B6, it wasn't working properly from the beginning, when we called Goodman (the installer HVAC technician), we were told, you have to install TXV valve, I wonder why Goodman sell their coil for this unit without installing the TXV valve, it is confusing.
some coils can be paired with different units and be a piston or TXV. Depends on the application and sometimes the refrigerant.
@@NewHVACGuide Thanks for your reply, it is appreciated. the condenser and coil were suggested by Goodman heat pump supplier, never mention I need a TXV. After we installed the heat pump we got a lot of problems, when we called Goodman tech, they told me to install txv, I just ordered it, I hope it will solve my problems with this heat pump, I had several goodman heat pumps, never had any problem.
Hello, I was reading the heat pump documentation, I found that TXV is the only option for my heat pump, unfortunately the supplier doesn't know that.
Sorry to hear that. Are you buying everything or your pro? I don’t usually ask my homeowner customers to worry about this stuff
@@NewHVACGuide I'm engineer (home owner), I understand most of it, but I hire an HVAC tech. (40 years of exp. ) unfortunately, he doesn't read and he tends to think he knows everything, just bad luck.
Ok, I am super confused with TX VALVE. Need your advice on it. I am going to get a Goodman AC unit. My contractor has no problem installing the TX VALVE but he is not a fan of it. As he mentioned the TX valve is troublesome. I have no clue what to do?
Why is he not in favor? It makes the system more efficient.
HELP - I POSTED THIS QUESTION ON THE WRONG VIDEO... HELP! Not sure if legit - everything could be just fine. I was told that my condensing coil had to be replaced - $4800+ out of warrantee of coarse. The failure was a "txv"? which looks like a part but they can't simply replace the part? Does anyone replace parts anymore? Tech made it seem that this is normal to replace the whole coil because the labor was so much anyways. I saw the unit open and could see and touch the txv if I had wanted to - very accessible by all appearances. Oh yeah, since I am already so much in on replacing the condensing coil unit, I might as well consider a new system.
I agree, some contractors don't like to replace a small part when they can make more money. Just talking to my neighbor today about how many repairmen don't like to spend the time to find the problem and fix it. Probably the same thing you ran into. Plus if it breaks again they have to come back and they don't like that either.
The txv coils need piston
Static pressures are a big deal, I bet 75% of systems are out of spec. because of duct of filter, coil dirty...SP will cause a huge efficiency kill. After I installed my system from scratch the SP was poor not enough supply and too high merv filter, after correcting and SP of .28 runtime was cut 50%.
Interesting. Yeah I’m surprised out how many folks in our industry who actually disagree with you. Weird.
I have a question
Alrighty... go ahead 🙂