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    elainemesser18's Avatar
    elainemesser18 Posts: 2, Reputation: 1
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    #1

    Jul 20, 2009, 11:05 AM
    Blower not working w/ AC unit
    Hello, I'm in desperate need of some help. When I turn on my central air the outside blower turns on and the cool air trickles out of the inside vents. I went down to check the furnace because I did not here it click on. I then opened the panel and saw that the fan inside the furnace was not spinning. I tried the heat and the fan came on with the heater not with the AC. I took a voltage meter and checked the wiring. There did'nt seem to be a problem except there is a round black "thin" above and to the right of the fan that has several wires coming out of it and the black one read no voltage. HELP I also changed the relay and that did not solve my problem.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jul 20, 2009, 11:47 AM
    Type of furnace? Fas or electric

    If its gas the door must be in place for the fan to run ( sorry a lot of people don`t know this)
    Its possible the higher speed winding in motor is bad and only works on the slower(heat) speed
    Can you determine if you have a 2 or 3 speed motor?
    elainemesser18's Avatar
    elainemesser18 Posts: 2, Reputation: 1
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    #3

    Jul 20, 2009, 11:59 AM
    I did hold in the safety switch w/ the panel off. How can I tell the speed of the blower?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Jul 20, 2009, 12:12 PM
    Brand name and model number of furnace
    Does it have a circuit board?
    Can you trace the wires from the fan motor to the circuit board and see what they are connected to? Identify what each wire is connected to
    The board should be labeled low--med--hi
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