Question about Craftsman Air Tools & Compressors

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Bought new 7 gallon 1HP horizontal craftsman compressor. Used first day worked great . Second day plug it up hit on switch and all it does is click when you cut it on and make a humming sound

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  • 403 Answers

Does it have oil? take it back for a replaement. pull the belt off and see if the motor is still good. turn the pump by hand to check for free turning.

Posted on Apr 23, 2015

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Posted on Jan 02, 2017

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SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

Posted on Nov 26, 2008

  • 1383 Answers

SOURCE: Craftsman 25 gallon compressor wont cut off

The pressure switch has snap action contacts that are opened by a diaphragm pushing against a spring mechanism. Unplug the compressor and remove the cover to the switch and look for the contacts. Make sure that they are not welded together from use. Move the on/off lever to see if they open and close. You may have welded contacts or broken mechanism within switch. A factory replacement is expensive, however if you are a tinker-er you can use a lower price generic pressure switch available on ebay. Switches are sold by pressure range, you need a 120#. Fittings may need tweaking. Enjoy

Posted on Dec 12, 2008

  • 234 Answers

SOURCE: air compressor not working

If your motor is running and not the pump, the malfunction is either in the pump or the coupling between the motor and the pump.

Some of these compressors are manufactured so cheap now that there can be just a set screw that is loose and the motor shaft is spinning free inside of the crankshaft.

If you drain the oil out of the pump and take off the pump crankcase cover, you should be able to see the problem.


Posted on Apr 15, 2009

  • 1 Answer

SOURCE: Air compressor won't go over 40 psi?

my ace air compressor which is 26 gallon 5 hp will not get over 60psi what is wrong with it please?

Posted on Feb 15, 2010

SOURCE: I have a Craftsman 3 gallon 1HP air compressor

Sounds like the compressor has failed -- probably the valve -- tear down and rebuild is probably the solution, or replace compressor, or just buy another unit. My nature would be to tear it down and see what's going on.

Posted on Mar 23, 2010

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4 Answers

I just bought a craftsman pneumatic 1/2-in drive impact wrench. And used it with my craftsman 4-gallon 1hp air compressor tried to loosen the bolts on my car wheel wouldn't loosen them help


Pneumatic tools are rated in cfm (cubic feet per minute). Your 1 HP air compressor is rated at probably not more than 3 cfm while the 1/2 " impact driver needs at least 8 cfm, maybe 12 chm of air.
The compressor must provide more chm than tool rating needs.
It is a problem, by the time you look at five horse power air compressors and larger, a lot of electric power is needed. A circuit of 220 volts, 20, 30, or more amps would be required to run those large expensive compressors.
If you can, return the air tool and get a good electric tool instead.
Leave those high air volume air tools to shops that are so equipped to use, or invest if you must.

Jul 24, 2017 | Craftsman Air Tools & Compressors

1 Answer

I have a 3 gal/ 1HP Craftsman air comp. When I plug it in and turn it on, I get the sound of current getting to the motor but it does not start. A failed Starting capacitor?


Could be, do you have a capacitor checker? It sounds like you have a compressor locked up. Do you have oil in the compressor? If the compressor is new I would take it back and see if it is still under warranty. before I did any thing to it.....

Dec 19, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

I just bought a used Craftsman air compressor at a garage sale...100PSI, twin cylinder, 1HP motor. Model # 106.154440. Runs fine, but wondered how to check the oil level in the compressor case and if it...


I have a Sears 106.154581 most likely like yours. You will find a small plug (fill hole) and slightly larger plug on side of pump close to bottom (drain hole). Fill compressor with compressor oil to top thread of fill hole. Oil should look rather clear with very little odor. Compressor oil is available at Lowes for about $3. Good luck

Aug 16, 2010 | Craftsman Air Tools & Compressors

2 Answers

I have a Craftsman 3 gallon 1HP air compressor that will only build pressure up to 25psi. The check valve was checked and looks ok. The pressure regulaor appears to be working ok. Bled off tank.The...


Sounds like the compressor has failed -- probably the valve -- tear down and rebuild is probably the solution, or replace compressor, or just buy another unit. My nature would be to tear it down and see what's going on.

Mar 22, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Air compressor won't go over 40 psi?


my ace air compressor which is 26 gallon 5 hp will not get over 60psi what is wrong with it please?

Feb 14, 2010 | Craftsman 1 Hp, 4 Gal. Air Compressor

1 Answer

Motor runs pressure stays around 25psi


if they are oilless compressors then the rings are worn

Jan 15, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Have 12 gallon / 1HP Craftsman compressor, accidentally ran it while it was low on oil....about half way low. It shut itself off. Then, I added oil and it started up. But now it builds pressure VERY slowly...


Not the motor, but probably the compressor shot. Heat from friction (due to running without oil) probably scored the cylinder walls, which allows air to escape past the piston and rings, making the compressor VERY inefficient. Some compressors have replaceable cylinders... Not sure if the very small ones do or not.

Jun 26, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Craftsman air compressor will not start


I am assuming that there is no air in the machine now. Otherwise it will not turn on if there is enough pressure in the tank.

If it will not start at all, the on/off switch on the pressure switch may not be turned on or it is defective.

You can also check the reset switch on the motor (red button).

These are very simple setups and it shouldn't take too long to troubleshoot.


Apr 18, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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