Question about Honeywell Power Humidifier: Furnace Humidifier/ Humidifier

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Noisy Amana furnace

I have an Amana Air Command 90 furnace, about 13 years old. ModelGUC/GUX (UPFLOW). There is a very loud buzzing or vibration soundcoming from (I believe) the vent blower motor, possibly from the rightside or lower right side of it as I face it. I'm thinking that Ishould replace the motor, but I'm wondering if it might be somethingelse. Otherwise, furnace seems to be working fine. Any thoughts or ideas?

BTW, I couldn't find an appropriate product category for the "What product is it about?" entry, so I picked the closest I could find.

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  • ackermanj1 Jan 06, 2009

    Correct. The vibration doesn't stop with my hand on it. If I try pushing on the motor a little, the noise changes some. Ideas?



  • Stephen Evans May 11, 2010

    You may have a metal venting wheel out of balance on the motor. The 90% effieient furnaces have very corrosive exhaust fumes and after time slowly eat away these venter motor wheels. If you can remove the assembly, you will probably find this to be the culprit. usually you have to cut the shaft of the motor off to get the wheel off. Let me know if you need more info.

  • Stephen Evans May 11, 2010

    This is vented in plastic correct? when the motor is running, gently rest your hand on it and see it the vibration stops.

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Remove the flue pipe from the top of the induced draft motor. Check to see if there any obstructions in it. If so remove them. If not replace the motor assembly.

Posted on Mar 29, 2009

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