Furnace problem run only on low speed

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  • patbucks
    New Member
    • Nov 2003
    • 1

    #1

    Furnace problem run only on low speed

    Hi,
    I have a electric furnace problem.

    The furnace is heating the element are turning on when I put the temperature up on the thermostat but the fan won't start blowing by it self.
    There is a switch to make it blow on high speed, that will not work, there is an other switch to make it blow at low speed and that works perfectly.
    I Have no idea has of what piece could be defective.
    Please someone help.
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