Question about Ingersoll Rand 2545/7100 Electric Air Compressor Start Up Kit 32305898

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Electric Air compressor just hums then trips breaker.

I have a 3 1/2 HP air compressor. When the air tank is empry is will start and run until full, However, when you use the air and it automatically starts to keep the air pressure up, the motor either just hums, or comes on makes a couple of turns and trips the breaker switch. Can you help?

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  • bingphillips Jun 16, 2009

    Where is the releaf valve located?

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Usally there is a releaf valve that takes the pressure off the compressor while it is resting. If that pressure is not off when the drive piston starts the motor will overload and blow the the breaker or reset. Check for a releaf valve for when the unit has reached full pressure

Posted on Jun 16, 2009

  • gregstlawren Jun 16, 2009

    usually around the compressor output tube ,maybe near the releaf valve(usually has an o ring pull) at the compressor end of the supply line.

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I had the exact same problem. Mine was because I had several ounces of water in my tank. I drained the tank and now it works great. I have come across others that have fixed this problem by replacing one or all of these: Check Valve, Unloader Valve, or Pressure Switch. Hope this helps your are someone else with the same issue.

Posted on Feb 14, 2013

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