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I have 1990 Armstrong gas furnace Ultra III 80, Model EG6G75dc8-4 .\r\nWhen I turn thermostat up , furnace comes on, burners come on, motor that I believe turns blower turns on but i AM NOT GETTING AIR blowing IN MY DUCTWORK, any suggestions ? Thank you

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  • Robert Mar 22, 2011

    Does the blower motor turn on?

  • vulcand2 Mar 22, 2011

    I checked again and the inducer motor comes on, the motor that blows out the exhaust vent.

    The Blower motor near the bottom of my furnace does not come on, I check the Door switch, and when I toggle that door switch my burners come on and stay on, but blower fan does not come on.

  • Robert Mar 22, 2011

    Check to see if you are getting voltage to the motor at the low speed motor tap on the control board and neutral. If you are thn check the capacitor, but discharge it first with a insulated screwdriver. Then take you meter and set it to ohms, the meters numbers shouls ramp up and down if not replace the capacitor.

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Have you checked your filter yet? the other thing to check is open the fan door and jumper the door switch,if there is one, and turn the furnace on. is the fan blowing air now?

Posted on Mar 23, 2011

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