Air compressor blowing circuit

by Betty
(VA)

My comp will at start do fine after use, when it tries to re start the motor to refill it breaks the circuit.

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Bill says...

Hello Betty, and thanks for writing in.

When your compressor tank pressure drops to the cut in pressure level, your pressure switch tries to start the motor so that the compressor generates more air, the tank fills, the high pressure cut out is reached, and the pressure switch cuts the power to the motor, and the compressor stops compressing air.

In your case, when the compressor pressure drops, the pressure switch tries to turn on your motor, and your breaker pops.

The problem could be a failed pressure switch, a motor capacitor, or the motor itself.

Since the pressure switch is the least expensive option of the three, in terms of replacing it, consider doing that first.

Cheers,

Bill