Air Compressor: Won't start with a full air tank
If the compressor won't restart after it fills the air tank, the check valve is likely stuck open. The open check valve causes high pump head pressure, preventing the compressor from restarting. Test the check valve by shutting off the compressor and bleeding the air from the air tank. Turn on the compressor to fill the air tank. Bleed air out of the tank to reach the cut-in pressure so the pressure switch attempts to restart the motor to refill the air tank. If the compressor won't start with air in tank, replace the check valve.
These repairs may help solve your Air Compressor problem:
Replace the air compressor check valve
The check valve prevents tank air from back flowing to the pump. A failed check valve will apply high air pressure to the head of the pump preventing the motor from restarting once the tank has filled. If the motor starts when the tank is empty of air but won't restart when the tank is full, replace the check valve.
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