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I have the pancake 150 psi compressor. It starts to build up pressure and then when it get close to the 150 level it starts to bleed off the pressure. I checked all of the connections. It sppears it is leaking out of the top of the piston thru a machine hole. Is there a solution to this issue. The unit is less than three years old and should not be breaking down so fast.

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To increase the life of your compressor you will need to lower the pressure setting of your pressure switch, or replace it with new one that will cut-out at 120. Most compressors have the pressure switch set to cut-out at about 125 psi. Lately, I have seen compessors being sold with factory set pressure from 150 to 200psi. Most single stage compressors can easily handle 120 to 125, however higher pressures are pushing the motor/pump to the limits. This is like driving your car at full speed everywhere you drive. Your car lasts many years because for the most part, you are only uning 20 to 40 % of capacity. Problem is that pressure switch is not really designed to be adjusted (factory set) but not impossible. Look for model number of the pressure switch itself and google for more info. If in fact it cannot be adjusted replace it with generic switch at lower setting. The lower the pressure cut-out , longer life of motor pump. Tiny hole in head is an unloader of sorts and helps the motor to overcome head pressure (yes, this method is less efficient than using pressure switch with unloader valve, however cheaper to build).

Posted on Jul 12, 2011

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Porter Cable pancake rated at 150 PSI stops at 135 PSI. It has done this since it was new.


If it's pumping up to 135 psi, shutting off and then restarts at the same pressure point since it was new, the pressure switch may have been set low at the factory. I don't know which model you have but most pressure switches have directions inside their cover as to how to adjust the cut-out and cut-in pressures. Be careful doing this, overpressuring the tank is dangerous. There is an adjustment screw or bolt that changes the pressure on the switch spring. Some pressure switches have two screws, one for cut-in and one for cut-out pressure. A few have one that adjust both pressures. If you do adjust the cut-in/cut-out levels, do it slowly and cycle the motor a couple times between each adjustment to see where it turns off and on. If the compressor is doing what you want it to, only pumping to 135 psi, it will live longer than if you adjust it up to 150 psi. Those last 15 psi of air are hard to get and will mean the motor will be running longer and more heat will be building up in the head.

Oct 01, 2012 | Porter Cable Air Tools & Compressors

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I have a C2001-WK that does not auto shut off


A regulator controls the pressure in the air line leaving the compressor and does not affect when the compressor turns on or off.

The pressure switch monitors the pressure in the tank and turns the compressor motor on and off when the switch closes or opens in response to changes in the tank pressure. If the compressor does not shut off, it is possible the pressure switch has been set to a pressure level that is higher than the compressor is capable of attaining, thus it does not shut off.

The compressor is capable of developing 150 psi and is noted as having a "120 psi cut-in pressure". When you say it doesn't shut off, does that mean it will generate 150 psi or more of pressure and fails to shut off or it develops less than 150 psi and does not shut off.

If the compressor does not generate 150 psi, then it is probably somewhat worn out and not capable of developing enough pressure to meet the factory high pressure limit. I would try adjusting the pressure switch upper pressure limit down to 130 psi or less (less if the compressor will not develop 130 psi) and see if this solves your problem If it doesn't,

If the compressor will develop 150 psi or more, then try adjusting the high pressure limit to less than 150 psi. If you can't adjust the high pressure limit then the pressure switch is defective and needs to be replaced.

Aug 03, 2012 | Porter Cable Air Tools & Compressors

1 Answer

My porter cable pancake PSI 150 keeps running will not shut off


The compressor has a max psi setting of 150.If the pressure is not reaching this or is only stabilizing at a low pressure you have an air leak around a gasket somewhere.If it is reaching 150psi and not shutting off your pressure switch is bad.Replace it.Check your owner's manual for a part number or go to www.factoryauthorizedoutlet.com to find the part.

May 05, 2011 | Porter Cable Air Tools & Compressors

2 Answers

My four-year old PC pancake compressor starts fine but only builds up 60 psi no matter how I adjust the pressure regulator. The compressor motor runs continuously. I checked for air leaks and can't find...


First take off the head on the air pump and check the reed valves on the valve plate. If they got hot and warped or cracked they'll work to a point then no more pressure can be built up. Next check the pistion ring and cylinder wall. If either is damaged you'll only get so much pressure build-up then it will leak past the piston.

Mar 07, 2011 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

I have an Ingersoll Rand T30 10 HP compressor that runs OK and will bulid up 150 psi without any problems. But when the pressure drops enough to kick the pressure switch, the motor won't start. just tries...


When the compressor comes up to pressure and kicks off, you should normally hear a gasp of air escaping. That gasp is the release of pressure from the compressor itself - not the tank, and it is supposed to get released so that the compressor can restart without being preloaded with compressed air. My guess is that the gasp is not happening. It is probably some debris or a gummy mechanism. The mechanism is supposed to be triggered by the same mechanism that shuts off the motor.

Aug 30, 2010 | Ingersoll Rand Type 30 Reciprocating Air...

1 Answer

Trouble building pressure


I would check the reed valves in the pump. One of them may be broken.

Jul 09, 2010 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

Will not pressure up even though it runs and runs and runs


Check for leaks of course... THEN check the check valve AND the Compression Relief valve which is OFTEN cintained in teh pressure switch. This valve bleeds the compression left in the head so the thing can restart without a pressure load. This is a small pintle that closes when the pressure switch starts the compressor. The check valve is the other thing and it is often a part of either the head or the pressure line to the tank at the tank.

Aug 17, 2009 | Porter Cable C2002 Oil Free Umc Pancake...

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

Jan 20, 2009 | Porter Cable C2002 Wk Oil Free Umc Pancake...

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