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    rwebud's Avatar
    rwebud Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Nov 10, 2007, 01:00 PM
    Blower stays on
    I am working on a Tempstar furnace, Furnace blower comes on even thermostat is fully disconected from control board. Replaced control board and limit switch. Furnace still coming on. Checked all the wire locations.

    Tempstar model is - NFCX3600C1
    Serial is- L001362305

    Any input would be appreciated.

    Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 10, 2007, 01:08 PM
    You fan control is stuck on or if a relay system the relay is defective.
    You might also have shorted wires leading from the thermostat to the furnace.
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