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    HW420KARI's Avatar
    HW420KARI Posts: 1, Reputation: 1
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    #1

    Oct 2, 2013, 09:41 AM
    Unicell Oil Furnace
    The burner starts but the fan will not kick on.. could it be the thermostat sub base or fan limit switch circuit board?
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Oct 3, 2013, 07:12 PM
    If it has a fan/limit switch, check for 120 volts from the fan terminal to ground. This measurement must be made after the dial rotates past the fan on setting.
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