Power - Air compressor will not turn on?

by Bill
(Hudson, WI)

Air compressor will not turn on.

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Hey Bill.

What is the pressure in the tank according to the tank gauge?

Is there power at the plug?

When you plug it in or switch it on, does anything at all happen?

If you have a multi-meter, with the power on, the tank empty, the pressure switch set to run, is there power running from the pressure switch to the motor?

As you can see, more info required. :-)

Please post responses as a comment here so I can follow the thread.

Cheers,

Bill

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Compressor will not shut off?

by Kathy D'Amico
(Webster New York)

Compresor will not shut off.
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Hi Kathy.

Is your complaint that your air compressor keeps running but doesn't gain any pressure increase in the tank, or is it that it keeps running, the pressure keeps building, and the PRV blows off to stop over-pressurization?

Please post your reply as a comment here so I can help you figure out what is going on with your air compressor.

Cheers,

Bill

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Oct 15, 2013
Compressor keeps running
by: Anonymous

Hello, My name is Tatia (tasha) and my stop button keeps popping out so I can't shut it off without unplugging it. The pressure seems to be sitting just over 100psi no matter how long it runs. Any ideas? I was afraid to use it so I stopped my project and found this forum. Glad to know about the safety mechanism for too much pressure...I was afraid the top would blow off or something..ha ha. And by the way, what is a PRV? Thanks in advance.
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PRV is pressure relief valve.

See the troubleshooting section on the sitemap page for links to pages about why air compressors run but don't build pressure.

Re this... "my stop button keeps popping out so I can't shut it off without unplugging it" I'm afraid that if it is an ON/OFF button that it's broken. If it is part of the pressure switch, first see if the compressor can be repaired to build pressure, and then see if that solves this problem.

B.


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Cap2040P-OF - shuts itself off?

by Mark
(Paragould)

when I'm using my compressor after a few minutes it shuts it's self off. If I unplug it and let it set for a few minutes it will start back and run for awhile and do it again. It has done this about 6 months after I bought it.
Ant help would be much appreciated.

Thanks
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Mark, is it shutting itself off after it reaches cut out pressure, or just shutting off randomly when it's running and trying to build pressure?

Could be a motor wearing out (is the motor really, really hot when it cuts off), a faulty pressure switch, or other reasons.

As a comment here, please give me more info about the shut down process to try and narrow down the reason.

Cheers,

Bill

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Oct 15, 2013
Stop button pops out
by: Anonymous

I have a Bostich 150 psi tank and when I started to use it yesterday I noticed that it had been running for a long time so I tried to push the stop button in and it kept popping back out. I had to unplug it to get it to stop running. Today I was out there about to use it again and thought since I just needed a few nails put in that I would just use it then unplug it again if I had to. I then noticed that the air pressure isn't going over 100. I hear some leaking air but not much and wouldn't think that would cause it to keep running. I guess I'm going to go back out and try letting the air out of the tank then try to figure out if the problem is the stop button, the pressure gauges, or a leaking tank. I'll keep watching this forum to see if anyone else knows what I should try.
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See the page on why air compressors run and don't build pressure on this site for some checks. Get that part fixed and then see if the stop button issue is resolved as well, as noted on your earlier post.

B.

Jun 02, 2010
Reply
by: Mark

It just shuts off randomly when it's running and trying to build pressure. I'm not sure if it's getting real hot because it has a big plastic housing around it. The only has about 5 hours of run time. it's like brand new. It's one of those pancake compressors. Thanks for answering my post.
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Mark, based on this additional information, I'm going to guess that it's shutting off on thermal overload. By unplugging it, you are letting the motor cool down, and I guess your compressor motor resets itself automatically.

If it is the thermal overload shut down, you may have a motor-failure problem, a mechanical issue back-loading and overloading the motor, perhaps a plugged up check valve into the tank... any one of these might cause the motor to overheat and stop.

Make sure, too, that you have clean and adequate power to the motor. This means, among other things, no extension cords.

If it's not the motor, I'd check out the pressure switch next.

Please post updates as a comment here.

B.


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CAP60P-OF won't hold pressure?

by Scott
(Currituck, NC)

my Bostitch Air Compressor (#CAP60P-OF) builds pressure on initial start up, however, after using it with a nail gun or sprayer, etc. I will not maintain pressure or build pressure after the initial pressure is used up. Please advise...
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Scott, are you saying that the compressor will not restart when the pressure in the tank reaches the cut in pressure level?

In terms of maintaining pressure, if the nail gun or sprayer is using more air than the compressor can generate, then the output pressure will continue to drop until such time as you stop using the air tools and the air compressor has time to rebuild the pressure between air uses.

Cheers,

Bill

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