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  1. #1
    Join Date
    Jun 2005
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    My outside condenser is running as normal, as directed by the thermostat setting. The fan control is set to automatic. Problem is when the thermostat reaches its low temp it shuts off the condenser but does not shut off the fan which will keep running as if it was set to on.

  2. #2
    Join Date
    Dec 2002
    Location
    Houston,Tx.
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    16,503
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    How old is the furnace or air handler?
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". -Vernon Law-

    "Never let success go to your head, and never let failure go to your heart". - Unknown

    "To face tragedy is the greatest challenge; to overcome tragedy is the greatest success" -Ranal Currie-

  3. #3
    Join Date
    Jun 2005
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    The furnace and condenser were installed in 1990. Thanks for your help.

  4. #4
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,503
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    0 that's close to the change over to boards so it could be a bad relay on the board or a bad fan relay, we are talking the inside fan continues to run right?
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". -Vernon Law-

    "Never let success go to your head, and never let failure go to your heart". - Unknown

    "To face tragedy is the greatest challenge; to overcome tragedy is the greatest success" -Ranal Currie-

  5. #5
    Join Date
    Jun 2005
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    4
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    Yes, it is the furnace fan that continues to run.

  6. #6
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,503
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    Need furnace Brand & Mod# to have a clue.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". -Vernon Law-

    "Never let success go to your head, and never let failure go to your heart". - Unknown

    "To face tragedy is the greatest challenge; to overcome tragedy is the greatest success" -Ranal Currie-

  7. #7
    Join Date
    Aug 2004
    Location
    Kentucky, Michigan, Ohio, Arizona, Colorado, Nevada, and Califormia
    Posts
    320
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    Red face

    newer furnace, bad IFC would be the most likely. Old furnace fan control circuit problem..probably IFR. Running continuously is not a hazard..but if it's a newer furnace, I'd have a Tech check it before winter...the IFC controls a lot more than the fan.
    "Surprised ?! If I woke up tomorrow with my head sewn to the carpet, I wouldn't be more surprised."
    Clark Griswold

  8. #8
    Join Date
    Jun 2005
    Posts
    4
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    It is an Amana Air Command Hi Eff 90 Gas.

  9. #9
    Join Date
    Aug 2004
    Location
    Kentucky, Michigan, Ohio, Arizona, Colorado, Nevada, and Califormia
    Posts
    320
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    barring extemporaneous circumstances.. it sounds like a bad IFC. Is there an error code ? The ifc controls combustion air, ignitor timing, gas valve timing, and all safeties. Get it checked before winter.
    "Surprised ?! If I woke up tomorrow with my head sewn to the carpet, I wouldn't be more surprised."
    Clark Griswold

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