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you have a dead short! Check the compressor you are plugging in. Check cord for damage to wires. If cord looks good and compressor is in good shape where you are plugging in is overloading circuit and tripping breaker. Does the breaker hold for any period of time when you reset it?
Are you hooking within 5ft of the outlet? If you are running a cord, then the cord can't keep the amp rating needed to run the compressor. I have one that does the exact thing. Try plugging it in close.
It sounds like the valve that releases the pressure out of the pipe that runs between the compressor and tank is not working once the tank is full and the motor automatically cuts off. This valve is attached to the Pressure control switch that switches the motor On & Off and usually has a small pipe going to it. You know the valve is working by the sound of a short spurt if air being released when the motor cuts off. If the valve is not releasing this air the compressor is trying to start under full load which the motor is not capable of doing, hence the humming and popping of breakers due to a current overload as the motor tries to start.
Yep! 2hp compressors need a strong power source. They'll draw alot of amps on initial startup. If they aren't getting sufficient power,they'll act just like this. It's causing the compressor's circuit breaker to cut out. Then when it cools off, it'll reset. My suggestion is to avoid using extension cords if at all possible. The longer the cord, the harder it will be to start. Try to plug directly into an outlet. If you need extension cords, use the shortest length possible. Also make sure the wire guage in your extension cords are no smaller than a 12guage wire(the higher the number, the smaller the wire guage).
1. Disconnect the power or put the circuit breaker to off position. 2. Disconnect the motor connection from the on/off switch. 3. Put the circuit breaker to on position and put the switch to on position. If there's a hard clicking sound even without the motor. Then, it needs to be replaced. 4. If there's no hard clicking sound, then, your motor must be grounded or partially burned winding. This must be corrected to get your compressor running.
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