Question about Heating & Cooling
The control board seems to be detecting reverse polarity, and my first thought is that the relay contactors are oxidized, but you could also have a bad startup capacitor, and/or control board.
The only reason I say control board is because the LEDs are blinking- never a good sign, but sometimes unplugging and reconnecting the power resets the board.
The following web page lists the steps to check for this problem, and is a good troubleshooting guide, and hopefully will help you solve this:
Good luck, and hope this helps.
Posted on Nov 11, 2010
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Posted on Jan 02, 2017
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