5hp 110v air compressor hums after its already filled its tank and shut off

by David
(Texas 76548)

It hums after its already filled its tank and shut off it won't start up till the pressure is at 30 or 40, and its done manually

__________________
If you are saying that your air compressor hums when it is trying to restart, that could be caused by a few things.

If the power supply is weak... long extension cord, too many other appliances pulling power from the same circuit, that could be a cause.

If the motor is weakening, that may cause it.

But likely, if there is no extension cord involved, your start capacitor is failing. See how to test it on this site.

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Electrical-troubleshooting-compressors.