Question about AO Smith 2 Hp Spl 3450rpm M56 Frame 115/230 Volts Replacement Air Compressor Motor Electric Motor No.B381

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5 gallon compressor tries to start then stops

AllTrade Model 480768 5 gallon tries to start then it stops. It was low in oil and added then tried again, but same condition.

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It sounds like the unloader is not working so it's trying to start with to much head pressure. One cause is a bad check valve another is a bad pressure switch. Those are the more common problems.

Posted on Jan 05, 2013

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Posted on Jan 02, 2017

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