Trane XV95 circuit board replacement?


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Old 08-07-16, 08:18 PM
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Trane XV95 circuit board replacement?

Hello,

I have a Trane XV95, specifically the TUH2B060A9V3VB model. Suddenly the furnace blower motor stopped working, but the AC compressor unit outside still runs when the t-stat calls for cool. I had a technician come in and he was able to bypass the circuit board and hardwire the blower to run. It worked fine, so he suggested a circuit board replacement. Problem is, he isn't sure it is the circuit board, but says that it's the most logical thing to replace first.

It's not a cheap thing to replace on this unit, so I'm wondering if anyone has other ideas? Is it normal for the AC compressor to still work, but blower to not turn on and have it be the main circuit board's fault?

If I do need to replace the board, the part numbers on it are:

50V64-495-04
D342263P02
CNT04985

I found that the Trane KIT 15816 replaces it and other boards. White Rogers 50V64-743 also replaces it and others. Do I have to search for my specific circuit board model, or does one of these work fine? I noticed a D342263P01 available fro cheap, does anyone know if it would work?

Thanks!
 
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Old 08-07-16, 10:25 PM
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Welcome to the forums.

Problem is, he isn't sure it is the circuit board, but says that it's the most logical thing to replace first.
We try not to "throw" parts at a problem and hope that it repairs it.

The first thing he should have tried is a jumper from the R terminal to the G terminal on the control board. He should also see if the blower works with the furnace in heat mode.

You have to use an approved replacement board. You have a sophisticated furnace and cannot just throw any board in there. It looks like the following link is a viable replacement. You need to check with any seller you buy from that what they are selling will indeed replace your board.
Upgraded-Replacement-Trane-Furnace-50A51-495/dp/B00EFCGIYG

The Trane kit is like $450+ as it comes with a new igniter and wiring harness.
 
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Old 08-08-16, 07:49 AM
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Hi PJmax,

Thanks for the prompt response. I'm not sure how he got the blower going to be honest, but I don't think it was through jumpering isn't because the t-stat was off at the time.

The board did have some lime scale deposits on it and we discovered some water in the air intake area below the filter. The filter itself was also wet in some spots. The hose that drains the AC was cracked at the point where it connects to the little plastic drain elbow at the furnace, which happens to be right above the main compartment with the curctuit board. Also, some of the wiring harnesses that connect to the circuit board had water inside the connectors. I should have mentioned this last night, but it was late. Obviously this changes the equation more toward the circuit board being damaged, but I just didn't like that he couldn't diagnose a specific part and just suggested we start with the board.

The quote I got was $1230.00 + 13% tax (in Canada) including labor, so I didn't want to jump in to that without being more certain. I'm a computer guy and the board replacement doesn't look like rocket surgery to me.

I didn't want to get the whole Trane kit, because like you said, it comes with things I don't need. The part you mentioned 50A51-495, doesn't list my furnace as a compatible unit though. It doesn't look anything like my board either. The connectors are all the same though, so it could work? The mount points will probably be off as well.

The model numbers I see on my board are:
50V64-495-04
D342263P02
CNT04985

Many thanks for your input.
 
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Old 08-09-16, 08:34 PM
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Doing some more research on this, the White Rodgers replacement board part number 50V64-743 replaces Trane Models CNT03777, CNT04678, CNT04985, CNT05160, D342062P01, D342263P01, D342263P02 and D342263P03, 50V64-495, 50V64-507, 50V64-743

Mine is the D342263P02, does this mean that I could conceivably get any of these listed above and they would work in my furnace?

There is a used D342263P01 on sale on eBay and all the connectors look identical to my board. Would anyone know the difference between the 02 and the 01?
 
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Old 08-09-16, 08:43 PM
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Always check with the selling party as they usually have the most update replacement lists.
Usually a higher number revision will replace a lower number.
 
 

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