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Loud humming noise

I have a Nordyne electric forced air furnace in my manufactured home. The home and furnace are only four years old and the furnace doesn't get much use. All of a sudden when I turn on the furnace now it starts up normal and really puts out lots of heat but after about ten minutes it starts making this loud humming noise. I can turn it down to stop it and thern turn it back up and it's ok for a while longer. I am scared to keep it running when it's humming in case it is not safe.

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  • Danny Clark
    Danny Clark May 11, 2010

    The only way to determine the problem is to track down the noise.



    Humming noises usually come from bad fan motors, contactors, or vibration.



    You will have to physically track down the location of the source of the noise before we can help you find the right course of action.

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  • 117 Answers

I can guarantee that the return is undersized and that's is what causing that humming noise.
Is this furnace in a closet ,if yes is there enough ventilation .

Posted on Jun 04, 2017

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  • Heating & Co... Master
  • 16,433 Answers

When was last time furnace was serviced --air filter change burner area cleaned vacuumed the hum can be a few reasons ---fan bearing need service [ oiled ] fan bracket bushings damaged or loose --burner out of adjustment burning improper etc these are a few

Posted on Jun 03, 2017

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Lous Noise

It could be the blower fan is loose and needs to be tightened. If so, and you're handy, shouldn't be too difficult. Depends on the specific design.

Posted on Jun 23, 2007

pierre1811
  • 144 Answers

SOURCE: Heat pump is humming loud>

When the heat is not on. Go to the T-stat and turn the fan to the on position. With the blower now running is it making the noise? If so you probably either have something in there such as the filter that was mentioned, a piece of paper etc. or one or more of the blades on the blower wheel is vibrating. Don't let the condition persist w/o having it checked out or you may turn a simple fix into a costly one.

Posted on Jan 22, 2009

jumptrout51
  • 3361 Answers

SOURCE: Furnace runs OK, but blower runs again a few seconds later

Could be a defective thermostat in the plenum.
When a gas furnace shuts down the fan(blower) will run until the plenum cools to the safe range. Usually 1 and 1/2 minutes.
Intermittent operation is a defective thermostat or relay.

Posted on Mar 11, 2009

  • 659 Answers

SOURCE: Anyone have a wireing diagram for a nordyne E1EH-015HA

Intertherm does not offer a wiring diagram for the E1 series anymore. So I have included a link to the E2 series. They are very similar and you may find this service manual helpful for whatever problem you may be having.

http://www.nordyne.com/literature/359a.pdf

Posted on Apr 11, 2009

breeze_ac
  • 8 Answers

SOURCE: i got a electric furnace and oil heat but when may

make sure the blower is working i believe that what make that noise.

www.breeze-air.com

Posted on Nov 02, 2009

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