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Question DetailsAsked on 11/14/2014

how much does it cost to replace an expansion valve on a carrier ac unit?

trying to buy a home. temperature differentials from my home inspection and another independent AC contractor are only 11F (20F expected). AC tech said expansion valve is bad based on pressure readings. seller sent their own tech and said weather is too cold to test temps or pressures. since it's not going to get any warmer, how much should i ask for in concessions?

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2 Answers


You should ask the tech what it costs. I had hoped that the HVAC pros that contribute here wouldhave jumped on this one, but I guess they missed it. Generally, I would say about $350-450 is a common number, though I have seen it come in for half that too. I would get a quote from your tech assuming the gas has bled out (so all needs replacement).

I was not aware there was a temperature issue on checking TEV's/EV's - but then I am in a colder climate so they are always inside the building and not exposed to cold outside air, so could be tested for a short time regardless - though of course with prolonged testing the outside unit might start freezing up, especially if one of the units without a dryer unit.

The problem you have, at least from what you said, is you don't know if the EV valve is bad or if you are low on gas and have a leak or compressor problem. That would concern me more, and to test that might require tenting and heating the outside unit for a full test.

All I can say is talk to the tech you had check it - both about their claim on the conditions not allowing test, and on the possibility of something else being wrong. I guess to be on the safe side you could hve them pay for a 1 year all-expenses A/C warranty, to fix whatever is needed come spring - that (with a proper warranty that actually menas something and does not have a high deductible or maximumm limit, not just a plain Jane home warranty) should give you protection, though is not going to be cheap. And you also have the issue of WHO it is bought from - because that person, if they sold it to the current owner, has a very strong incentive to say nothing is wrong.

A tough decision, but one that is potentially worht thousands out of your pocket if thereis a major problem and the unit needs replacement in its entirely.

Answered 5 years ago by LCD


It honestly depends on the difficulty based on the location....units vary...also, depends on if it’s the TXV in the air handler or the TXV in the heat pump. TXVs in the heat pump (the out door unit) are generally more difficult to braze in because of their location. Also, TXVs vary in price at the parts house based on size, refrigerant, brand, etc. Also, if you are replacing the outdoor TXV, you have to recover all of the refrigerant....if it’s the indoor TXV, you can simply pump the unit down.

i just replaced an outdoor TXV at a flip property. The part cost me $104. The customer was billed $637.99....and I am “budget priced” with low margins and only $85 per hour)

cost of part x 2 =...........................................$208

labor, 3 hrs....................................................$255

shop supplies (gases, brazing rods, etc).............$30

2 lbs R22.......................................................$120

tax, on all but labor.........................................$24.99



Florida Certified Air Contractor

Answered 2 years ago by CAC1819274

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