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    Rafal's Avatar
    Rafal Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jan 19, 2010, 08:15 PM
    Heil dc90 furnace fan always on
    I recently purchased a house with a Heil DC90 furnace. I just realized that the furnace fan never turns off. The heating is working properly and it keeps the temperature in the house just fine. However I am concerned that the fan is always on. The fan control switch on the thermostat is in the auto position.
    It seams like it is in a lower speed when the furnace is not actually producing heat, and only goes into a higher mode when the heating/cooling is running. However I am concerned that with it being on 24/7 it will burn through the motor.
    Is this a wiring problem with the thermostat, or is this something internal to the unit?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jan 19, 2010, 08:36 PM
    Some folks program them to run like that,, what is brand and model number of the tstat,, would you happen to have the manual for it?
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