5 hp northstar wont start

by Nick
(Minnesota)

Hi

my air compressor has a 220 and i have tested and know i have 110(both sides of the pressure switch) running through the pressure switch. Is there any diagnosis i can do inside the motor

its a 5hp century ac motor Cat B182

thanks for any help you can give

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Bill says...

Nick, are you saying that the motor is 220 Volts? I'm not quite sure.

The last time it reached cut-out pressure, did the compressor unload?

When the pressure in the tank drops below the cut in pressure, what happens? Does the pressure switch try to engage.

A bit more info would be useful.

Thanks,

Bill