blower motor stops after minutes of running

Problems related to residential installations.

blower motor stops after minutes of running

Postby dkent2 » Mon May 09, 2011 3:30 pm

Hello, ive been trying to get my a/c to work for a couple weeks now, ive made some progress but keep running into problems. The outside unit wouldnt come on, I got it wired correctly to come on, then it wasnt pushing enough air out of my vents, I did some checking found my a coil was horribly clogged got that cleaned and getting awesome air flow. Now though the blower motor stops after a few minutes of running. Ive pulled it out and cleaned the wheel and vacuumed the dust off the motor, I purchased a new run capacitor hoping that was the problem, but no it still turns off after a few minutes. The motor spins freely and I cant find out any more info from searching on what to check. I dont want to buy a new motor if I dont have to, I dont have any money which is why ive been doing all this my self. Its getting really hot out and I have a 3 kids and a wife to keep cool if theres any help some one can give me it will be much appreciated.

the model number on the blower housing is 901998 and the model of the furnace is mgha-05abfc-02 its a nordyne. The numbers on the motor are 5kcp39hg,r025s and cpn 621323d

Hope this is enough info for some help thanks alot.
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- blower motor stops after minutes of running

Postby cascadehvac » Mon May 09, 2011 4:47 pm

you can confirm if the motor is bad or not. but you might kill yourself. call a tech.
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- blower motor stops after minutes of running

Postby dkent2 » Tue May 10, 2011 9:03 am

I did some more looking around and I found a 3 position rocker switch labeled on,off,fan. when its on the on position is when it kicks off after running for a few minutes, it turns off when it its on and i put it on the off possition. and it stays on when i put it on fan and doesnt kick off any more. Any one know what this switch goes to?
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- blower motor stops after minutes of running

Postby dkent2 » Tue May 10, 2011 10:18 am

this switch i found isnt the main one on the outside for auto/on for controlling the fan by the way
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- blower motor stops after minutes of running

Postby Braut » Sun May 22, 2011 3:09 pm

Where is the switch located then? You said "it isn't the main one on the outside"... so is this the switch on the inside by your thermostat?
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- blower motor stops after minutes of running

Postby nomadpeo » Thu Jun 23, 2011 1:26 pm

sounds like you're describing a unit in a mobile home. is that the case ? if so, there may be an additional relay involved.

since you started having the problem after you cleaned the coil, is there a possibility you got water in something electrical ?
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