Bob S. wrote:
On Jan 30, 4:19 pm, wrote:
I have come in possession of a Craftsman model 919.165200, 5 hp, 20
gallon air compressor that when turned on runs for a few seconds then
throws a breaker in my shop. Anyone have a clue as to why or how to
repair? Anyone come across this problem before?

TIA

Jerry

Things that will cause the breaker to trip:
1. using an extension cord with the compressor.
2. other units running when the compressor kicks in.
3. bad or under rated circuit breaker. (need 15-20A)
4. a bad pressure switch on the compressor.
5. a bad capacitor on the compressor motor.
6. a bad motor on the compressor.

Bob



7. a bad unloader valve (maybe that's what you meant by the pressure switch)

Bob (no relation)