33 gallon craftsman compressor blows the breaker

921.165720 Craftsman air compressor

921.165720 Craftsman air compressor

I have a 33 gallon craftsman air compressor on a dedicated 20amp breaker and it still blows the breaker from time to time on start up.


Any ideas

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Jan 09, 2016
Thank you about 921.165720
by: Kris

Model no. 921165720

I bought the compressor brand new and it's been doing it since day one. I only have a 100amp service at the house. Could it be that I'm just running out of juice in general. But if that was the case wouldn't it trip anything else?

Jan 08, 2016
start cap
by: Doug in s.d.ca

It's possible it has no cap(s), but not likely.

Please give the model number and also check your manual - if the cap is not separate, then it's under one of the external covers on the motor.

BTW, is this new or "reconditioned"?

Jan 06, 2016
Hmm
by: Kris

Thank you for your reply. Its a 120v motor so I don't think it has a separate capacitor. I looked and don't see anything. I ran the wiring my self with 12 gauge wires and it's literally less then 2 feet away from the breaker box.

Nov 12, 2015
blows breaker
by: Doug in s.d.ca

Assuming this is an existing installation:

You probably have a failing start and/or run cap.

See the trouble shooting pages for "will not start" or just go straight to "testing capacitors".

Please let us know if that's not it.

Good luck.

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craftsman model 165310 pops the circuit breaker

by Tim
(Fresno ca)

It worked fine until I drained the tank, now pops the circuit breaker upon startup even with the drain plug out

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Dec 01, 2015
Pops breaker
by: Bill

Pretty much all covered in the troubleshooting pages, Tim. Have a look, and then if you still have a question, add it as a comment.

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Craftsman 919.167312 arcing breaker

by Shawn
(Hendersonville, TN, USA)

The Craftsman model # 919.167312, 2 hp, 30 gall, 150 PSI vertical will not start whether there is 100 PSI or O.

The pressure switch arcs severely when manually turning on.

If I leave the switch on the house breaker trips.

I replaced the pressure switch thinking it wasn't making good contact since the contacts were burned up some. That didn't fix it.

The same severe arcing occurred with the new switch when I turned it on as if something is shorted.

From reading online some my guess is the capacitor now but I don't want to spend more money on it without knowing for sure.

I love this compressor and have had it for about 10 years and it has been SOLID working inside the house with nail guns and outside the house plenty on my car and truck through the years.

Please help me to diagnose and recommend part/part number.

Thanks! Shawn

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Aug 23, 2015
start cap
by: Doug in s.d.ca

That'll do it.

Yes, when parts are on Amazon they are almost always cheaper (sometimes by FAR) on Amazon.

When you re-install, check the wires for rot - the leakage sometimes eats wires...

Aug 23, 2015
Reply to self and others
by: Anonymous

Hi, the motor turns freely and perfect by hand.

I took a look about the motor and further inspected.

I found my start capacitor had leaked out its guts pretty bad all over the plastic case and wire terminals. Probably shorted. Reminded me of what an older car ignition coil would do when it went bad with extreme swelling.

I have ordered the part on Amazon for a fraction of what Sears wanted!

Thanks

Aug 21, 2015
arcing
by: Doug in s.d.ca

Sounds like a near-short. Could be bad wiring, bad cap, or bad motor winding.

What happens when you turn on the power aside from eventually blowing breaker? Does it act like it's trying to start or just sit?

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