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I do not have any pressure. Motor runs but when I removed the tank pressure gauge there is no air coming out where the gauge goes.

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  • 44 Answers

Check the valve plates on the head they could be stuck.

Posted on Nov 20, 2014

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Posted on Jan 02, 2017

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SOURCE: Craftsman 6hp / 60gal air compressor

Make sure your pressure switch is set correctly. Check your pressure gauge and make sure it is functioning correctly. Also,seems sometimes if there is any time when there isn't the adequate amount of power demand supplied the motor heats up more causing the thermal protection switches to act a little finicky which in turn shuts it down.Check how many amps the motor is rated compared to the breaker controlling the circuit. Is it a dedicated circuit only for the compressor or are there other things also drawing power from the circuit ?

Posted on Nov 17, 2008

  • 1383 Answers

SOURCE: Start up problem

The problem that you describe is caused by the in-tank check valve and/ or the unloader at the pressure switch. When the compressor cycles off the pressure switch releases the air that remains in the air line thru a small valve. There is a 1/4 " plastic tube extending from the check valve to the switch. Listen for the release of air as soon as the compressor stops. There is a small metal tab that pushes on the unloader valve that may need to be adjusted. The motor does not have enough power to start pumping if there is air/backpressure in the air line. If these parts are working correctly then check the value of the start capacitor and use meter to measure. The cap should test within 95 % of stated value. Parts are available at Enjoy

Posted on Dec 13, 2008

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SOURCE: Air pressure gauge does not move on Craftsman 1Hp, 12 Gal. Air Co

I would say that the gauge needs to be replaced. These are common items so go to any auto parts or craftsman hardware store and purchase a replacement.

be sure to use some joint compound or teflon tape on the threads so u dont have any leaks.

please rate my answer. thanks.

Posted on Feb 03, 2009

  • 226 Answers

SOURCE: coleman powermate compressor doesnt hold air


Posted on May 23, 2009

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SOURCE: Was working normal suddenly will not build pressure

Maurader1 an apprentice has this problem solved and is spot on. All these gurus and wiz need to stick to the basic and common sense. The first place your pump will give out after use or abuse is the gasket. All this garbage about defective reeds and defective pressure switch is a lot of nonesense if you first don't rule out the most common problem the head gasket. I'm cheap and this thing has paid for itself 10 time over. You can get a gasket kit for $7, but I fabricated a gasket out of the back of my notebook and sprayed some gasket spray and been working like a charm ever since.

Posted on Jan 04, 2010

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New Goulds 1/2hp water pump w/Square D switch goes on by itself for ten sec. Then off for 5 sec and on for 2sec. 2 minutes later it does it again.Adjuster nuts do nothing to stop it going on again...?

if you are using a pressure tank, that condition is said to be a water lag. Try to drain your pressure tanks using the following steps,
1. remove the drain plug of your pressure tank. (in most cases it is located at the tank bottom just be aware that there might be a pressure still on the water inside your tank so just remove it slowly).
2. remove the pressure gauge using a suitable open wrench.(this is to remove any standing water inside your pressure tank.Same principle as the 2 holes on a can of milk)
3. after all the water has been drained reinstall your drain plug and your pressure gauge.
4 put a water priming on the pump if necessary before starting your motor again.
The condition above is condition 1, if in case you are using a pressure tank.

We will now discuss condition 2 wherein there is no pressure tank installed on your water system.
Your motor can easily run because there is no enough water to use inside you pipeline since there is no pressure tank on your system. In this case, try to install a pressure tank so there will be enough water pressure build up on your tank before using the water on any water faucet.
Also try to check for water leakage along your water pipeline since frequent motor running when not in use of any water faucet means that the water is wasted on some parts of your pipeline.
Good luck and I hope I've enlightened you.

Nov 14, 2015 | Plumbing

1 Answer

I have a CH HJ 300200 that will not build pressure, there seems to be pressure building in the tank but the Pressure gauge does not move. I removed the pressure line going to the tank, it gets hot and...


I would remove the pressure gauge and check the bottom of the air gauge fitting. The small hole at the bottom of the gauge fitting may be clogged. Sometimes when the pressure gauge is installed a piece of Teflon tape (used to seal the threads) can get lodged over the pressure gauge air port.

Jan 24, 2015 | Campbell Hausfeld Air Tools & Compressors

1 Answer

Pressure switch cycles on off

Check your pressure tank, sounds like bladder has a leak. Unscrew cap on valve on pressure tank (looks like valve on car tire where you add air to tire) turn cap upside down and use, or small screwdriver to depress valve, if water comes out bladder has burst and replace pressure tank. If not then check bladder pressure with tire gauge. Correct settings are clearly posted on pump. Then add air to pressure tank or remove air to correct pressure. Use a accurate pressure gauge.

Jan 29, 2014 | Plumbing

1 Answer

I have a 2 gallon compressor , no air comes out?

Check if air intake is clogged.
Check if drain valve on tank bottom is open or closed.
Look at pressure gauge and see if pressure is zero.
Adjust pressure so tank will hold 80-120 psi.
Check air lines between compressor and tank to see if they are leaking. Listen for leaking air while motor is running.

Jun 24, 2012 | Campbell Hausfeld Air Tools & Compressors

1 Answer

Will not compress air

If while running the air pressure in the tank comes up (watch the tank pressure guage) but then leaks out after the pressure switch turns the motor off, you need to check/replace the tank check valve. If the motor runs and runs and the tank pressure never comes up or gets over 30 to 40 psi you need to check: cold start valve if it has one; piston/ring/cylinder condition; valve plate reeds. Any of these will contribut to you not getting enough pressure in the tank for the pressure switch to turn the motor off.

Jan 30, 2012 | Air Tools & Compressors

1 Answer

Will not build up pressure

You did not state whether the compressor would kick on automatically, or whether it would kick off at some point, so I have to work through it with you....
If the compressor runs, you should see pressure on one of the two gauges. The gauge that is closest to the tank is the pressure that the compressor proper is putting out to the tank, and is the primary gauge. The other gauge is the pressure supplied to the tool via the hose, downstream of the regulator. If you are seeing pressure at the first gauge, that's a good sign. Also a good sign is if the commpressor runs and switches off at some point before lifting the PRD (pressure relief device). This tells you that the compressor is pumping and that the pressure switch is working. If this is the case, try working the regulator control knob and watch the second gauge. The regulators can be tricky; sometimes the regulator knob operates in the opposite direction than expected, depending on the type of regulator, so experiment a bit. (Usually there is wording and an arrow on the knob telling you the direction to adjust. If you start to see a rise in the pressure on the gauge, go ahead and set the desired tool supply pressure.
If you can get a pressure on the first gauge, but nothing on the second gauge no matter how you manipulated the regulator, you should suspect a bad regulator.
If there is no pressure on the first gauge, try cracking open the drain valve on the tank and starting the compressor. If you get air out of the tank with no indication on the gauge, you should suspect a bad primary gauge. If you get no air out of the tank, open the drain valve further and check again. If still no air, the compressor itself is suspect. You will need to determine that the motor is in fact turning the compressor. If the motor is running, but the compressor isn't moving, unplug the compressor and reconnect the linkage. If the compressor will run with the motor, the compressor may be shot, or tha air intake may be plugged off. Remove the cover on the air intake and inspect the filter. Clean and replace as required.
If the compressor will start when you operate the on/off switch, but does not kick off at some point, the pressure switch is probably at fault. It is an odd piece of is mechanical, electrical and pneumatic, all at once. You would need to troubleshoot each portion in order to put it right. The most common problem with the pressure switch is burned or welded contacts, followed by wiring issues to the contacts, then the air line to the switch, then mechanical linkages within the switch.
This humble guide should be enough to get you going. I hope that it has been useful.

Regards, and good luck!


Jul 18, 2009 | Campbell Hausfeld 02-Gallon Air...

3 Answers

The air tanks fill with air, but the pressure

The regulator sounds like it is cranked closed. Try slowly operating the adjusting knob in the opposite direction. As the valve moves, you should see the pressure rise on your gauge (it probably does work).
Hope this go make something!
Best regards, --W/D--

Jul 18, 2009 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer


Is the air "leaking" from the pressure relief valve? If so it is either faulty or it is doing what is supposed to do. The pressure relief valve is there in case the pressure switch fails.The tank could blow up if the pressure switch fails, so the pressure relief valve is there as a secondary measure to insure the tank does not receive too much air pressure. Assuming your gauge is operating properly, watch the gauge to see if it reaches the maximum pressure (check your manual to find the maximum PSI) or if it goes over the maximum pressure. If it goes over the maximum pressure then replace the pressure switch. If it the motor stops at the maximum pressure, replace the pressure relief valve.

Jun 07, 2009 | Dewalt D55250 Factory Recondition Heavy -...

1 Answer

Compressor comes on and hums and goes off and does it again, ?

The fact that your compressor completes a cycle indicates that the motor and pump are probably working correctly, however when the pressure switch cycles off there should be a slight release of the air that remains in the airline. If this air is not released thru the unloader of the pressure switch the motor cannot overcome the back-pressure in the airline and just hum. There should be a 1/4 in. hose extending from the pressure switch to the checkvalve in the tank. There is a small tab and needle valve that releases the air. Also check that the tank checkvalve is not leaking air back into the airline as this would cause back pressure. Finally, failing motor start capacitor will cause motor to hum. Weak capacitor will start motor when cold and no pressure in tank, but when things heat-up and with pressure in tank, motor may not have enough power to overcome load and hum. Enjoy

Oct 29, 2008 | Dewalt D55140BN Heavy Duty 2 Inch Brad...

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