My air compressor will not fill to maximum capacity, why?

I have a small electric Craftsman air compressor. When I turn it on, it will only fill to about 20 pounds of pressure. Any idea what could cause that?

paganman2007-12-12T14:24:32Z

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You didn't say if it contiues to run or if it shuts off at 20#.
If it shuts off at 20# adjust the regulator, if it continues to run check to see if the drain spigot is closed all the way and check for leaks..

?2016-05-23T10:45:39Z

Yes you can convert it, however it is designed to compress a refrigerant, not air. This makes it inefficient as well as slow. Also, you have to remove the refrigerant at a collection site. The amount of money this would cost you would be a lot more than it would to visit your home repair store and buy an air compressor with an eight gallon tank with all the fittings and hoses included.

William B2007-12-12T15:14:52Z

Bad air pressure shut off switch, would be located at the pipe comming out of the tank,
there is an adjustment, but it could be bad,

tech74352007-12-12T14:19:23Z

turn up the air pressure regulator. Should be located near the gauge. Turn clockwise

Anonymous2007-12-12T14:12:40Z

locate and turn up the regulator , usally found on the side of the pressure gauge

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