Question about Craftsman Air Tools & Compressors

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Probably a hole in the diaphragm in the switch. It could be loose also. With the compressor unplugged, try to tighten the screws on the bottom side of the switch (usually in a circular pattern). This might fix it, or you may wind up having to replace the diaphragm, or just replace the entire switch.
Regards, --W/D--

Posted on Jul 26, 2009


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Air compressor dont work freon is full but if you cross wire from sensor plug to battery it engages the clutch

clutch also wont engage on to high of charge need to check pressure switch for high pressure cut out. thats why they cycle build up pressure it slowly bleeds off than they come on again to build it up they are not constant like a house unit

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1 Answer

Compressor initially starts up and fills tank to 120 psi with no problem. Compressor shuts off. When a tool is used the compressor tries to kick back on but hums and won't turn pump. If the "off"...

There is a small valve on the pressure switch that should relieve the pressure between the compressor and tank check valve. Make sure when pressure switch trips, it engages the relief valve and it bleeds the air out. Sometimes the valve itself comes loose and is not engaged by the lever in the pressure switch.

Oct 30, 2010 | Campbell Hausfeld 20 - Gallon Air...

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I have a Bostitch CAP2000P-OF 6 gal compressor. When the pressure switch cycles off, the compressor bleeds off air till the pressure switch cycles on then it stops. It repeats this cycle constantly. It...

Something is wrong with your "unloader" I should think. That is the device that removes the pressure from the cylinder so the machine does not have to start up against its full air pressure
There will be a narrow air pipe connecting the compressor to the switch assembly which bleeds off the air when the power is off. That hiss you get when you turn it off or it turns itself off.
I think you will find a leak there or possibly the non return valve that stops all the air escaping when the unloader valve is open has failed or got a foreign body stuck in its seating.

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1 Answer

The air compressor continously bleeds out air from the area near the on/off switch. Any ideas of what is wrong with it or where to look for the problem?

If the side of the on off switch has a copper tube going to it it could be that the unloader valve is leaking continuously. Spray some wd 40 on it. Or the unloader may need to be adjusted. There should be two small jam nuts holding the unloader to the pressure switch. Loosen these nuts and shift the unloader away from the lever. Re tighten the jam nuts.

May 20, 2010 | Air Tools & Compressors

1 Answer

The compressor bleeds off air at 120 psi and the motor won't turn back on to fill unless it drains completely.

ok buddy your pressure switch has gone faulty this can happen i reccomend replacing with a new one off ebay for cheap buddy

Nov 02, 2009 | Campbell Hausfeld 13 - Gallon Air...

1 Answer

Model # DD2T2,compressor does not stop,till it bleeds back to 80 pound,pressure switch has been change. should stop at 120 pounds

so buddy what your saying is the compressor stops and then bleeds down a lot of air get back to me

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1 Answer

Air leak after reaching 150 psi & shutting off

Everything I read in the owners manual suggest you take unit in for a trained service tech to repair. It could possibly be a few things causing this but from what I can see there are not that many replaceable repairable parts for this. Good luck

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