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

    Jan 10, 2009, 04:57 AM
    Trane xv80 fan runs in on but not auto
    Trane xv80 starts and runs fine... there is nice blue flame, everything is blowing, then the main blower quits, flame keeps going until safety device shuts it off. This is all with fan in auto or on position

    Without call for heat, fan runs all day in on position, and does not run in auto position.

    What could be causing this?
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #2

    Jan 10, 2009, 09:15 AM
    Probably a bad circuit board. Check for evidence of burned circuit paths or relays. You may be able to wire in the blower hot for interim heating.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jan 10, 2009, 09:41 AM
    Could also be a defective motor. You might try to feel the motor with the power off to see if it is over heating.
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