Question about Hdc Homer Hdc 2 Hp, 4 Gallon Pancake Air Compressor

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Bad pressure switch

Need replacement pressure switch for ac0306hpc/03941 pancake air compressor

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I have a Central Pneumatic 38898 pancake compressor that will not shut off when the pressure reaches pre-set PSI. I have replaced the pressure switch but to no avail...HELP!!


There must be a blockage on the fitting where the pressure switch goes in that stops the air pressure from reaching the regulator. Try taking the switch off and turn the compressor on and see if air comes out the hole

May 23, 2015 | Air Tools & Compressors

1 Answer

Porter cable pancake compressor will not shut off replaced manifold, still the same.


I would look at the pressure switch which shuts the electric off when the air pressure reaches its limit also check all wires going to and from this switch. Best checked with a multi-meter.

Feb 07, 2015 | Porter Cable Air Tools & Compressors

1 Answer

Porter Cable Pancake compressor builds pressure, but will not shut off when max pressure is achieved. Pressure switch is NOT the culprit.


Most P/C compressors shut off at 150psi. If the pressure switch is bad, the pressure will rise until the safety pops. If the safety is not opening, then most likely the cylinder / piston ring is worn to the point that pressure will not increase past safety range (cylinder could be scratched near top ). If cylinder and piston are ok, then air is leaking somewhere (check all joints with soapy water). Good luck

Sep 17, 2013 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

Unit has developed a continuous leak


need to replace pressure switch as the leak is a worn needle valve assembly. it usually unloads from there when the machine stops

Sep 06, 2012 | Clarke Power Products Inc AC2001 2HP 4...

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

1 Answer

I've got a Porter Cable pancake air compressor with, what I think is, a bad pressure switch. Plugged in, switch to auto, and nothing happens. Unit is bleed and gauge is at 0. I can get a new switch for...


You can test the other components of the compressor by temporarily by-passing the pressure switch. Connect line in to motor wires and plug in unit, unplug when pressure reaches 125 to 130 lbs. There is a safety relief just in case so do not worry. It the pressure does not reach target pressure there may be a leak or worn cylinder. If target pressure is reached in a short time replace pressure switch. Very easy repair. Good Luck.

Aug 07, 2010 | Porter Cable 18 - Gauge Brad Nailer and...

1 Answer

Mastercraft compressor - one pancake type tank ... need pressure


You do not need to use factory replacement switch. Mos t universal pressure switches are set to shut off at 120-130 psi. You will need to check the placement of the unloader valve (1/4 line from check valve) and the quantity of ports as some switches have only one port and others have 3-4. Check ebay for good match and low price. Good Luck

Aug 01, 2010 | Air Tools & Compressors

1 Answer

Portable oiless compressor wont pressurize


If there is pressure at the pump, either:

1) The tank check valve isn't opening (it's located where the line from the head enters the tank - usually extends into the tank, and the the pressure switch unloader line comes off of it as well)
2) The pressure switch unloader is bleeding off the air. This is a small valve on the side of the pressure switch. It should close when the compressor is running and open when the compressor shuts off to bleed off head pressure.

Oct 19, 2009 | Campbell Hausfeld No.FP2028 Gal Pancake...

1 Answer

My air compressor (pancake task force) cycles on and off at around 100 psi. Is this an adjustment or could the pressure switch be bad? Could not find my particular compressor in the product listing.


EITHER YOUR PRESSURE SWITCH IS BAD OR YOUR TANK IS COMPLETELY FULL OF WATER AND THERE IS LITTLE ROOM FOR AIR. ALWAYS TAKE YOUR SWITCH WITH YOU WHEN PURCHASING A REPLACEMENT.

Apr 03, 2009 | Dewalt 2 Hp 4 GAL Air Compressor

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