Question about Goodman GMS90703BXA Heater
Due to dust and dirt accumulation, my motor furnace motor is whining. How do I clean the internal parts?
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
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Oct 06, 2014 | Goodman GMS90703BXA Heater
Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. Dirt affects all three basic components of your furnace, so cleaning is the most important part of regular maintenance. The three parts of the furnace should be cleaned: the filter system, the blower, and the motor.
The furnace filter should be replaced or cleaned at the beginning of the heating season and about once a month during periods of continuous use. To check the filter, take it out and hold it up to the light. If it looks clogged, replace it with a new filter of the same type and size regardless of the length of time it has been used.
Step 4: Clean blower assembly, belts and pulleys to blower, and motor housing. Cleaning blower is critical if furnace has a squirrel-cage fan, because openings in this type of blower often become clogged with dirt. To clean blower, remove panel that covers filter to gain access to blower or panel on front of furnace. This panel may be slip-fit on hooks or held by series of retaining screws. Access to inside of blower is usually gained by sliding out fan unit, which is held on track by screws.
If power cord to fan assembly is not long enough to permit fan unit to slide all the way out, disconnect cord. Mark wire connections first so you'll be able to reassemble unit correctly. With toothbrush, clean each fan blade and spaces between blades. Then, with vacuum cleaner hose, remove all dirt and debris loosened by brushing. Vacuum belts and pulleys. Wipe motor housing clean to prevent heat buildup in motor.
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