Question about Northern Industrial 2 Hp Twin Tank Electric Air Compressor

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My compressor starts up and reaches the desired pressure, but when I have used it for a short time and the pressure drops, it does not kick back on automatically. It bogs down and trips the circuit breaker on the unit. I have to hit the reset button and release pressure from the valve at the top of the cylinder. what causes this and how is it fixed?

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YOUR COMPRESSOR MUST UNLOAD WHEN IT SHUTS OFF SO IT DOESNT START UNDER A LOAD THE NEXT TIME. MOST SMALL COMPRESSORS UNLOAD WITH A VALVE ON THE SIDE OF THE PRESSURE SWITCH.REPAIR VALVE OR REPLACE THE PRESSURE SWITCH (KNOW PSI OR TAKE SWITCH WITH YOU).YOUR COMPRESSOR IS STARTING WITH AIR PRESSURE ON TOP OF THE PISTON. CHECK VALVE COULD BE BAD BUT IT SHOULD BE BLOWING AIR ALL THE TIME.

Posted on Mar 14, 2009

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My first guess would be an electrical fault in the pressure sensor, but as your compressor only does this after it works for a while, the problem should be related to heating, so, I'm betting on a seizing cylinder or bearing. Try running your compressor with a very wet towel wrapped around the cylinder to see if the problem is indeed heat related.

Posted on Mar 11, 2009

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2 Answers

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i suspect that the start/run capacitor is faulty or the centrifugal switch in the back of the motor is faulty

have an accredited electrician check the motor , capacitor and the pressure control switch
the air leak at the head is a faulty non return valve in the compressor line to the tank
available at good tool shops for around $60.00

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If you are using the air supply between when it stops and when it comes on again, then this might be normal. You havent mentioned what model/size compressor you have, but if is only a small 1-4 Gallon tank model, then these dont really hold a lot of air, and if you are using any air tool that uses a lot of air, you will be exhausting the tank supply VERY quickly, so the compressor fires up again to refill the tank.

If the compressor is only staying on for a split second after it fires up again, try plugging the compressor in directly to a wall outlet (ensuring the outlet is properly rated) and avoid using extension cords, which can leave the compressor with little power to overcome the tank pressure to kick over and refill. Compressors are best run directly connected to a main outlet, not via an extension cord.

There may also be a problem with the switching/regulating mechanism for the motor if it is jumping on and off in rapid succession. Check your regulator/tank pressure gauge. Take note of what pressure it kicks back on at, and what pressure it stops at. Many compressors will kick back in when the tank pressure drops to 80 PSI, and may stop when the pressure reaches 100-120 PSI.

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Thanks for using FixYa.com

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a

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