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    hfields237's Avatar
    hfields237 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 4, 2008, 08:37 AM
    The furnace starts and blows hot air with the AC on!
    I installed a new thermostat about 6 months ago before winter. Everything worked well until I tried to turn the central air on a few days ago. The compressor outside turned on, and the blower turned on, and blew cold air for a few minutes. I went back and checked it and it was blowing hot air. I went into the basement to check and the furnace was lit. I checked all the wires and called Honeywell customer service. They said they problem was with the furnace. The furnace is only about 2 years old, and the central air about 3 years old. I only have 4 wires coming out, I don't know what could be wrong. Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 4, 2008, 10:42 AM
    Check fuses and circuit breakers for the outside unit. If it ran for a few minutes and quit now it might have tripped the circuit or blew one of the fuses outside.
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