6.4 HP Ingersoll Rand Compressor Motor just hums

by Randy Bragg
(Ponder, Texas)

I was using my compressor yesterday with my nail gun.... I noticed I lost pressure so went to check.. My compressor had tripped the breaker and when I turned the breaker back on and turned it on it would just hum... I also noticed that the on off switch on the compressor arched when I turned it on... Any idea where to start? it is a 80 gallon ingersol compressor with a 2 year old WEG 6.4HP motor on it.... Motor and pump do turn....

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Apr 11, 2016
It Was The Capacitor
by: Randy

i looked at the troubleshooting section... can't believe i missed it and it is the starter capacitor....

Apr 11, 2016
Ingersoll motor hums
by: Bill

Check out the troubleshooting pages on this site, in particular, the one about air compressors that hum on start up.

A list of things to check can be found there, Randy.

After doing the checks if the problem continues, post a comment here.

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