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Old 04-26-2013, 06:04 PM
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Originally Posted by S10 Racer View Post
If your compressor is 220v, the pressure switch has two contacts in it, one for each 110v leg. If one of those legs are burnt out or not making contact, the motor will just hum also. It may very well be the motor but I would double check all of the simple stuff first.

Just make sure you shut the power off before doing any testing.
very true, good call
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