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upnorth15's avatar
upnorth15
Explorer
May 14, 2016

HELP----AC fan blows when thermostat is set to OFF

I just had a new AC installed in my 2009 travel trailer. Crazy thing is happening.. The only way to turn the AC fan off is to flip the AC breaker or unplug the trailer from power. This is a non-digita...
Hornnumb2's avatar
Hornnumb2
Explorer
May 15, 2016
You might check the metal box that holds the control board. (The part that has the wiring diagram on it.) I have had 2 that I have purchased that the standoffs inside the box that hold the board are broke and the pcb shorts against the metal case. You can try to pull out that one bolt holding it and flip it over to see if you hear it moving around in there. Please do with breaker off as there is 120v in there.

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