Question about Amana PTC153B50AJ Electric Heat Air Conditioner

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Dead Board on Amana PTC153A50AD

I have disassembled the control side of my PTC153A50AD. After peering under the backside of the board (the facing side looks fine) I noticed some discoloring... When I removed the board I discovered it was shorted out... in a Big Way. It looked as if someone threw a screwdriver across the terminals. It is under the first large relay(?) from the left, where the most damage is and appears to have emanated from. I have no problem replacing the board,, but it seems to me that something else would have caused the problem in the first place. If so what? If not I will order up the board right away. I don't want to fry a new $140.00 board because of some unknown problem...

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Re: Dead Board on Amana PTC153A50AD

Before the replacement of board please check the fallowing:

- Check for loose terminals and re tight.
- Check compressor terminal post if terminal clips are tight.
- Check compressor resistance and terminal to ground resistance. And check your compressor is not stuck up.
- Check indoor and outdoor blower motor if not stuck up by rotating it with your finger, if it rotates freely then its ok.
- Check the resistance of both indoor and outdoor fan motor resistance and line to ground.
- Check your voltage supply if normal.
- Check the compressor and blower motor capacitor if good.
- Check the unit supply wire if not discolored.
- Check the terminal of your circuit breaker if tight.
If all of the above are ok then it is safe to replace your unit with new board
May be poor contact of the said relay may cause the blowing of your board. Volatage fluctuations is also the suspect or damage solder of the board due to heat.

Posted on Jan 22, 2008

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