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    todd1's Avatar
    todd1 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 5, 2010, 09:50 AM
    What is a circuit board on hvac system
    Is the thermostat is hooked to the circuit board
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Apr 5, 2010, 10:08 AM

    Control boards are different with every model but basically are small computers that look like these Amana Furnace Model GUVA090BX50 Control Board Yes your stat connects to the control board usually 4-5 colored wires
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