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

    Dec 14, 2008, 09:42 PM
    Fan in attic not working.
    The fan in the attic is not blowing with the a/c on (the compressor will run outside) or if I just turn the fan to on on the thermostat.

    However, it will run if I turn on the heater.

    Suggestions?

    Thanks!
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Dec 14, 2008, 10:19 PM

    Most likely, something in the fan control circuit has failed (t-stat fan switch, fan relay, or wiring between the two). Heat relay usually controls fan in heating mode.
    BadAnimal's Avatar
    BadAnimal Posts: 2, Reputation: 1
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    #3

    Dec 15, 2008, 07:58 AM
    Thank you for the quick reply!

    And are those issues that you mentioned relatively inexpensive to have fixed?


    Quote Originally Posted by KC13 View Post
    Most likely, something in the fan control circuit has failed (t-stat fan switch, fan relay, or wiring between the two). Heat relay usually controls fan in heating mode.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #4

    Dec 15, 2008, 08:13 PM

    Relative to cost of system replacement, yes. Relative to cost of lunch at McDonald's, no.
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