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  1. #1

    Noisy 5+ year old Themastar Blower Motor?

    I am having a strange sound coming from my furnace/ blower/ etc.. I can turn my fan on from thermostat everything is fine. I can turn on furnace and everything is fine. When I turn on the AC the blower??? is making a squealing noise. I can't seem to pin point where it is coming from. Could it be a noisy bearing on blower motor? I was thinking that, but I would think that the noise would also be present when furnace and fan were running. Thanks for any help.
    Dave

  2. #2
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,887
    Some furnace's use the higher speed taps for ac and lower speed taps for fan only and heating operation .need a tech to look it over before it does not run at all .could be a bad blower wheel

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