2hp craftsman compressor just started occassionally blowing breaker

by Steve
(Huntington, NY)

Hi, I have a 2hp 20 gal craftsman 110v compressor that just started blowing the 20 amp breaker occassionally when starting. The compressor is about 28 years old and has been on the same line with no problems. The compressor just poped the breaker when it tried to turn on during cycle, it motor just hummed and didn't move. I reset the breaker and the comp started and ran fine. I cycled the motor about 6 times another day and I got the same problem to repeat but I turned the switch off when the motor just hummed and didn't start. I flipped the switch back on and it worked fine again. It seems to be a dead spot in the motor, any ideas where I should start?

Thanks for your time, Steve.
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Steve, since a humming motor suggests it's trying to start and cannot, my first suspect is that your start capacitor is weak, and/or maybe something else is pulling power at the same time, and intermittently.

Cheers,

Bill

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919.167620 craftsman compressor builds pressure then stops

by Rick
(Miami, Fl, United States )

I have a 2year old air compressor from craftsman it's an 1.6hp 33gal air compressor model number 919.167620.

The problem is the compressor starts to build pressure then it starts to make a surging noise then i can see that the piston isnt moving anymore it just stops then I turn it off right away.

It takes forever to build psi wih this problem please help me! what could be causing this?

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Bill says....

OK Rick, a couple of questions.

When it starts to build pressure and reaches the point where you hear the sound and the piston (you can see the piston?) stops, what is that pressure level, and is it consistent? In other words you shut it off after it stops, you dump the air, you start the air compressor again, and let the pressure build, will it stop at the same pressure setting?

Or, does this happen almost instantly when you turn it on and the tank gains very little pressure?

When the piston stops, is the motor humming, or has the power to the motor stopped?

Cheers,

Bill


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Jun 19, 2012
My craftsman compressor builds pressure then stops
by: Rick

No, its not consistent, the pressure continues to build up, then it starts to slow down againthen the piston and rod stops moving again then i turn it off again and let it cool then when i start it back again it builds up more air again.

It doesn't stop instantly majority of the time it builds up again.

When it stops the motor is humming loudly like its being muffled.
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Rick, see the troubleshooting section on the site map page. See the pages that refer to compressors that run and don't build pressure, and do the checks referred to there.

If all else checks out, including your caps, then I would surmise a failing motor.

Cheers,

Bill




Jun 19, 2012
My craftsman compressor builds pressure then stops
by: Rick

Well when i turn it off and then back on, the compressor continues to build up pressure.

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