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    ammarthamid's Avatar
    ammarthamid Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 18, 2011, 10:57 AM
    Trane xr80 does not run in heating mode
    Power is on, circuit breaker is fine, 120 V is present at door switch and to the board, 24 Volts present at transformer, Thermostat is returning a 24 V at the white wire when it is set to a temperature higher than room temperature and set to Heat and Fan on Auto. Nothing happens, the red LED flashes three times ( I did check the Press. Switch , took the wires off put them back on nothing ). There is a visible damage to the printed circuit board ( photo attached ). Now after meddling with the board the LED will not turn on at all. Help.
    JonesHVAC's Avatar
    JonesHVAC Posts: 173, Reputation: 12
    Junior Member
    		  
    #2

    Oct 18, 2011, 07:36 PM
    Replace the board.
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