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Air handler motor and capacitor for Goodman air handler A42-00 is not operative. Need part number help to find right parts to install.

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Just take out the fan and capacitor they are not OEM so any fan motor would work as long as same Horsepower and milti speed. And the capacitor is a 5 uf or maybe 7.5. You might have to cut off the shaft of the new fan motor so it don't stick out.. You can get a new fan and capacitor at any Heating and Air parts house. And you are sure they are bad you ohmed them out? Fans are not cheap about 50-75 bucks retail. Let me know how it goes. ken

Posted on Dec 23, 2008

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Goodman air handler ARUF036-00A-1A does not blow air in heating or cooling mode only hums/buzzes, what could it be?


Looking at the wall thermostat, you will see the fan switch that has two settings: fan auto, fan on.
You will need to place the fan switch in the fan on position for testing purposes.
This will make the indoor fan run continuosly, and never cycle off.
In the fan auto position, the fan will turn off when the thermostat temperature setting has been satisfied.
Remove the air handler access panel.
Is the air handler fan operating?
If the fan isn't working see if you can listen closely if it is humming, or can touch the motor to see if it is hot.
If it is humming and has a bad capacitor, you can tell this without having an electrical tester by spinning the fan wheel by hand.
Be very careful... making sure your hand won't get cut by the fan wheel spinning when it starts up.
If the fan spins and picks up full speed, replace the defective fan capacitor.
It is the shiny silver metallic cylindrical object with electrical wires attached to it.
Make sure you write down where those wires attach and turn the power off before removal as they carry 240 volts to the fan motor.
If you find that the fan wheel doesn't turn freely when you try to spin it by hand, the bearings have seized and you will need to find another fan motor of the same size, shaft length , speed , and horsepower to replace the defective motor.
Keep in mind that a humming sound in the air handler COULD be from the transformer instead of the fan motor.
The transformer is a black cube shaped device with electrical wires attached to it.
If the 24 volt transformer goes bad, your thermostat will not function and nothing will come on.

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does it have high voltage power? if so then either the capacitor or the motor is bad if in doubt try the capacitor first it is cheaper

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1 Answer

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have you check the 24 volt transformer in the air handler? you must have 24 volts from the thermostat to the tranformer in the air handler.

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Check the capacitor before you replace the motor. It's a common problem that's easily fixed. Make sure the fan rotates freely.

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There is no schematic or number on air handler .outside unit is Goodman # CPE48-1FB.How can i get a schematic for Air handler.


I need more info than just the outdoor unit number. The air handler will be a specific number. If you pull the access panel off the heater, there will be a faceplate inside with the unit name and model number as well as a schematic on the back side of the door.

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1 Answer

My air conditioner air handler humsbut moter does not turn on compressor runs ok Goodman air conditioner


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1 Answer

Motor for Air handler will not stay on.


sounds to me lik eyou may have a bad run capacitor. this will most likely be an oval shaped device directly wired into the motor. Be very cautious when you remove this and make sure you discharge it to a grounding source as it will shock you.

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