Sears air compressor won't start and trips the breaker.

by Scott Moody
(St. petersburg, FL)

My Sears air compeossor won't start and trips the breaker.

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Scott, please have a read of the "compressor will not start" pages linked from the site map, and give me some ideas about the condition of the compressor, the power supply, the tank pressure, what you see and what you hear when you try to start your Sears air compressor and the breaker trips. I need more info if I, or any reader, can help your compressor problem. Add more info as a comment here, please.

Bill

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Craftsman model 921.166390 wont start

by Mike M
(Strongsville, Ohio)

Was using my 4 year old compressor to inflate car tires when it just quit working.

I have unplugged it, drained it and tried to restart.

It has been three days since i had this issue and cannot get it to run.

When plugged in and turned on you can hear a buzzing or humming sound for a few seconds before it gets quiet again. Was not using an extension cord. Took shroud off top and i am unable to turn the flywheel by hand. Is motor shot?
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Possibly, Mike.

That it hums for a while then stops suggests that it's trying to go, and overheating as a result, shutting it down on thermal cut out.

Assuming the same issue is there with the tank empty of all air, the next thing I would do is check the capacitor. See how to on this site.

If the cap checks out, then it may be the motor itself.

Bill

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Sears 25 gal. 5hp air compressor suddenly won't start!!!!

Checked circuit breaker and electrical is not the problem.
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Please have a look at the troubleshooting page about why air compressors won`t start, then add a comment here with what you found.

Cheers,

Bill

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