Question about Heating & Cooling
A service tech "should" eliminate each potential problem part before replacement.
If the problem is intermitent, that can be a challenge.
If its not the the swithc, and three techs have looked at it, I would suspect the board as it is what sends signal to all the switches, and produced the diagnostic codes.
Bad boards can also send false failures to other components.
I'd replace the board.
Posted on Dec 17, 2008
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Posted on Jan 02, 2017
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