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How to lubricate a goodman GMP furnace motor

When the motor turns on it makes this loud sound the entire time it is running as if it needs lubricated. Is this possible, and if so how do you do it?

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  • Goodman Master
  • 2,458 Answers

On the end of the motor is a small cap may be red open this you oil it from there .

Posted on Feb 11, 2012

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Posted on Jan 02, 2017

hotuna
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SOURCE: Goodman furnace motor is dirty

The blower motor, squirrel cage (fan) and its housing can be removed as a whole part. Disconnect the wiring harness to the motor, remove the ground wire. Look for a couple of screws that mount the blower housing to the furnace. they will 5/16 head size and usually be at the top. The bottom slides into a metal notch on the frame. With a little work and maybe a few cuss words, pull the whole thing out. A shop vac or air compressor will remove the dirt. Some dirt may be determined to stay, so a stiff bristle brush may be needed. Replace in opposite way you removed it. If the whistle remains, check the duct work and metal panels, and anywhere there is a gap or tape. This may be the cause of the whistling noise, but cleaning the vent holes in the motor and the fan blades cant hurt and will help the efficiency of the system and increase the life of the equipment. If the whining is the little vent motor up top, then try oiling with a thin turbine type oil, or just replace it, as they are relatively cheap. If you are asking about cleaning the internal parts of the motor, I wouldn't recommend doing that. If there is an oil port on the motor housing, use the oil I recommended earlier. Most likely it has a sleeve bearing not a roller type, so that's about it.

Posted on Jan 12, 2008

  • 108 Answers

SOURCE: goodman gas furnace power vent motor and housing replacement

You need to type GOODMAN GAS APPLIANCES into you browser to find you local servicecenter. I must tell you that Goodman only sells to authorized service companies in my experience. So you become EgKraft Company.

Posted on Nov 07, 2008

  • 3600 Answers

SOURCE: How to fix twinning problem for a goodman GMP 100-4

Call AAA back it should be warrented if they worked on it frst don't touch it or you lose your warrent, it does sound like the thermal bulb is not in the flame so call them back fist then let me know post here and I will try to help you if they do not sove the problem, you should have a work order they gave you when they did the repair. Hold on to it.

Posted on Oct 09, 2009

Testimonial: "The thermal bulb would cause the twinning light to come on."

  • 232 Answers

SOURCE: I have a goodman GMP 125-5 furnace. I have

sounds like the primary limit typically behind the gas valve its larger then the others, rectangle in shape with 2 wires going to it. be careful if your bypassing limit this can create a very hazardous condition

Posted on Nov 06, 2009

SOURCE: how to change fan speed on a goodman gmp 100-3

Usually you can find the control board on the lower part of the furnace. Turn the power off and remove the
doors. This board is usually located directly in front of the blower motor.

On the control board locate the terminals marked heat/cool/park and Park Lets say the Heat Terminal
has a red wire attached to it and you want a higher
speed.

Red is uasually low speed, remover the red wire from
heat terminal and exchange it with a wire attached to
a terminal lab eled park. Black is usually high spped

Posted on Jan 02, 2010

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Sounds like the fan switch on the furnace is set to low. Turn power off to furnace, take door off of furnace look for a fan switch, it may be a fan - limit together. The limit settings should be approximately 160° to 200°, and the fan settings should be about 100° to 140° set it to 120° it it's already set there then you probably need to replace it.

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