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    webbm2's Avatar
    webbm2 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 26, 2008, 05:32 AM
    From heat to air conditioner
    Heat pump will not switch from heat to ac... help
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    May 26, 2008, 05:49 AM
    Model number and brand of unit?

    Bad reversing valve
    Bad reversing valve coil
    Check for 24 volts at the coil If present check for coil continuity/OHM if defective replace.

    Valve itself will have to be professionally replaced since it is brazed in place.

    If you replaced the thermostat lately that could also be a problem if not set up or wired correctly.

    Make sure wires going to the outside unit are OK. Dogs/animals chew on them.
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