Question about Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k

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Never shuts off

Compressor doesn't shut off ,doesn't regulate pressure to spray gun,loses pressure as I spray.

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Check the pressure release valve to make sure it is not leaking. Do a compression test if necessary and check gaskets for leaks.

Posted on Nov 11, 2009

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Posted on Jan 02, 2017

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1 Answer

How Do You Choose an Air Compressor for Home use?


you go by how loud it is

2 HP is a std home use direct drive motor 240 volt
with regulator
.. pump tyres . air hose .blow of benches low pressure spray paint gun a rattle gun

step up to twin cylinder belt driven compressors
trade preferred
for high daily use of air tools and spray painting..
8cmf to 10 cmf and more
can high pressure gravity feed spray gun

26321322-k4yf1ulnrrhd1qfad32c0iqa-1-0.jpg

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Oct 21, 2016 | Air Tools & Compressors

1 Answer

Kobalt gravity spray gun and I have a little air that comes out constantly. Why is that and how do I stop it? Thanks


You must be using a "turbin" which is different and better than a compressor however a turbin runs all the time and air must escape from it unlike a compressor with an airtank the shuts off after the desired pressure is reached it shuts it self off then turns back on with tank pressure drops below what you have set it at- a turbin reaches the pressure you set the regulater at and maintains it constantly NEVER STOP THE AIR FROM PASSING THRU IT in fact a lot of times i do this to remove any dust i may have missed so evrything is working like it should on yr sprayrig..

perry tradesman

Oct 19, 2014 | Kobalt Large Gravity Feed HVLP Spray Gun...

1 Answer

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 air compressor doesn't seem to want to shut off. how do i know i have it set correct


turn pressure regulator all the way to the left, therefore requiring the least amount of air pressure(psi) in the tank so it will shut off at its minimum. If it still continues to run, its probably a bad regulator pressure switch and your going to need a new one. Good Luck

Jun 07, 2012 | Coleman Air Tools & Compressors

1 Answer

My compressor does not hold pressure, no leaks that I am aware of. When I press are gun pressure goes way down.


May just be bad pressure regulator. Easy test. Let out all the air from the compressor. Find and remove the safety valve. Install a tee fitting where safety was installed and reinstall safety and a quick fitting at the other port. Now let compressor fill and shut off. Connect gun to temporary quick fitting for test. Replace the regulator as needed (you can install a generic pressure regulator at the temp. fitting for fast repair). You do not have to uninstall the test fitting.

Jul 01, 2011 | Air Tools & Compressors

1 Answer

When does it shut off, what tank pressure.


It should shut off at 120 lbs, unless something is running or leaking, it will never shut off. Most nail guns run at full steam. Paint sprayer's get regulated down to 35 or so.

Feb 26, 2011 | Dewalt Air Tools & Compressors

1 Answer

Why do I lose pressure while spraying. The air comes and goes. I have to wait for the pressure to build back up to spray again.


Well, either a system leak or your compressor does not have the capacity for the air usage of the gun. Spray guns have high air consumption.

Oct 10, 2010 | Campbell Hausfeld Air Tools & Compressors

2 Answers

I have a model FP209501 Air Compressor 2 Gallon,


2 gallons is small to begin with u need to buy an in line pressure adjuster/regulator their a few bucks and can be attached to the paint gun or line and will keep the pressure at ur adjustment the regulator on the tank sets the tank pressure at 50 so when u us it will let it drop down to about 45 than start up to build the pressure up to 50 than shuts off than repeats it self the inline keeps pressure steady even if tanks are at 200 psi

Jan 18, 2010 | Campbell Hausfeld 04 Gallon Twin Stack...

1 Answer

The pump on my air compressor broke. I bought another to replace it. The problem is that I do not know where to plumb in the pressure switch onto the new pump. There is no place to do so, unlike the old...


where the air comes out of the tank. put in a T ee
attach the relief valve to one side. on the other side will be your auto shut off / regulator unit.
make sure your relief valve and your auto shut off sencing unit are installed upstream from any regulating device.

Nov 10, 2009 | DeVilbiss Dagr...

1 Answer

I have a Campbell Hausfield wheelbarrow type compressor model #vt617206aj that will not stop making air, just builds and builds until emergency relief vave opens. please help


It sounds to me that you have a defective regulator valve assembly.

This is not a trivial problem. It should be repaired and NOT used until it is repaired.

The emergency relief valve is there for a reason --- to prevent an explosion of the pressure vessel if the regulator does not shut it off.

This is not a do-it-yourself type of repair. A machine shop, or even a welding shop could probably do this repair for you.

If the compressor is an older one or a low value compressor, deep six it and get a new one.

May 17, 2009 | Campbell Hausfeld Adjustable Pressure...

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