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Old 01-10-2012, 10:22 AM   #1
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Goodman GMNT FAN


Fan is making a loud sticking noise then fan shuts off and tries turn back on and sometimes does, continuing to make noise and sometime does not, gave a light tap on the transformer and will kick back on Any suggestions.

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Old 01-10-2012, 10:25 AM   #2
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Fan is making a loud sticking noise then fan shuts off and tries turn back on and sometimes does, continuing to make noise and sometime does not, gave a light tap on the transformer and will kick back on Any suggestions.

Could be a blower wheel mis-aligned and rubbing the housing, that would have a distinct metal on metal extremely loud metallic rubbing sound. If a blade of the wheel came apart than it'd be a very, very loud banging.

The run capacitor of the motor could be going out or the motor itself is going bad.

You sure it's the fan making the noise?

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Old 01-10-2012, 11:00 AM   #3
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Goodman GMNT FAN


free spin the squirrel in both directions shouldn't brake stop hard clear all dust off the motor air inlets rounds on the squirrel clean....that tapping of the TR might of bounced a relay mounted near it or on a control board if you have one....check the free and alignment as suggested....
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Old 01-10-2012, 01:57 PM   #4
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Pretty sure, after I hear the noise the fan slows down to where it is off then turns back on and in 15 sec make the noise again, this will repeat itself 3-6 times. But does not happen every time the heat kicks on, the heat can come on 3 times in an hour without making that noise, it is intermittent.
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Old 01-10-2012, 05:19 PM   #5
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Goodman GMNT FAN


sounds like the motor bearings are going.
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Old 01-11-2012, 11:15 AM   #6
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the fan moves in both directions but not freely sometimes it sticks/stops.
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Old 01-11-2012, 11:17 AM   #7
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When you say blower wheel misaligned what are you referring to?
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Old 01-11-2012, 11:25 AM   #8
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If it's sticking it's the blower motor itself, bearings are shot. The wheel is what holds the fan blades, called a squirrel cage. It litereally looks like a very big hampster wheel. Sometimes the bolt which tightens to the shaft of the motor comes loose and the wheel scrapes the housing, or sometimes the actual shaft itself which comes off of the motor and as the bearings go out has some play in it.

Again, it's the motor.
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Old 01-11-2012, 11:45 AM   #9
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The age/ brand & model helps tell us what type of fan system you have.
We also get folks interchanging the names of inducer motors and blower motors.
Most likely you are talking about a direct drive fan blower so if that fan cage sometimes gets difficult to turn by hand without an accompaning scrapping noice, it is a failing motor.
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Old 01-11-2012, 12:37 PM   #10
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the manual says Goodman GMNT it was installed in 2004
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Old 01-11-2012, 01:15 PM   #11
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Sometimes the fan does not come on and I hear a humming noise, sounds like the motor is magnetized and if I give a little tap on the transformer, the fan will kick back on, is this a different issue or the same?
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Old 01-11-2012, 01:28 PM   #12
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I have looked at some pictures online and according to pics online the issue I am having is with the inducer motor, this is where the noise is coming from see pic
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Old 01-11-2012, 04:12 PM   #13
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If it is an inducer motor that you are talking about, and sometimes the external fan attached to it will not turn and isn't grinding against anything to stop it, you need to change the inducer motor. Everyone I know just changes the whole inducer assy for ease, simplicity, because the removal of the faulty motor from the fan wheel can be difficult, because the fan wheel can be damaged during that removal, etc.....
A number of facters can stop an inducer from turning on but the only thing that will make it difficult to manually turn with the power off, without a grinding sound, is a failing motor.
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Old 01-11-2012, 04:33 PM   #14
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The inducer motor is still working but makes a loud noise on occasion towards the end of the heating cycle.
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Old 01-11-2012, 04:37 PM   #15
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You said it was sticking. Those motors need to be oiled from time to time, recommended I believe to be every six months. No worries, no one does it hence some years down the road this occurs.

Look for a sticker and a possible plug used to add oil in the inducer.

It may or may not be too late.

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