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

    Jul 13, 2010, 03:52 PM
    Two thermostats one furnace / ac unit.
    I live in a 4 story townhouse - furnace in the basement. I have two thermostats with ON/OFF switches. In the winter, I turn the main floor tstat off and turn the basement tstat on. The house heats the basement to the tstat setting, and, by adjusting the vents, I can keep the upper 3 floors comfortable as well. In the summer I turned the main floor Tstat off and the basement tstat on for the AC. However, when I turn the fan from auto to on, it runs the compressor continually and doesn't let the temperature setting in the tstat turn the system on and off. Any suggestions?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jul 14, 2010, 05:47 AM

    Call a professional HVAC contractor and have them check into installing a zone damper control system on your system. This should solve the problem and allow you to operate two separate thermostats correctly. This is a complex issue and requires much skill so trying to describe all here would not work. You might search Google under HVAC forced air zone.
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