Compressor does not kick back on soon enoph

by Julie
(Cranston RI)

Compressor builds max pressure then when you release air it does not come back on until like 5 mins or so why won't it come back on as soon as i release air it will go as low as 40 psi and won't kick on at high we get it to 130 psi

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Hi Julie... could be a bunch of things.

It is normally the pressure switch that turns the air compressor on when the pressure in the tank falls to the normal cut in pressure, and the pressure switch turns the compressor back off when the pressure in the tank gets to the high pressure cut out.

If the pressure in the tank is falling below the normal cut in pressure, and nothing happens on the compressor to suggest that it is trying to start and it cannot, then my guess would be that you need a new pressure switch.

Cheers,

Bill

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air compressor is trying to compress air before the motor is up to speed

by gerard skelly
(manchester)

the problem is like when the capacitor is blown however after replacing it I now realize that the unit is trying to compress air before the motor is up to speed
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Not knowing the make, model or age of the air compressor makes it very difficult to diagnose a problem such as this.

From your post Gerard, I'm inclined to think that maybe your unloader valve isn't working.

Please see the troubleshooting section on the sitemap page and the Unloader valve page for further information, and do add a comment here with your findings, including compressor information.

Bill

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Compressor not building pressure above 95PSI

by Gerry
(Mississauga, ON, Canada)

Hi,

My question is more about troubleshooting to identify the actual source of the issue. My compressor purchased from Princess Auto 2 years ago and is a single stage 5HP 60GAL compressor. 2 weeks ago I noticed the compressor wasn't building pressure above 80PSI. I immediately noticed air blowing out of one of the 3 intakes so I removed the head and noticed a blown gasket. I replaced the gasket (home made) and the blowing issue is gone and now appears to go up to 95PSI but I do not feel sucking from the intake yet I do from head #2. I am sure I reinstalled the reed properly.

Thank you for any help.

Gerry
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Hey Gerry, if the valves are installed correctly, and you aren't feeling air being pulled into the intake, then I'm going to guess that you still have a gasket leaking.

Bill

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"PowerBuilt" compressor with a 5 gallon receiver - receiver tank isn't building pressure.

by Vince
(Barrie, Canada)

I have a 2HP (running), 3HP (peak) "PowerBuilt" compressor with a 5 gallon receiver, which works fine (other than it doesn't supply enough CFM for my impact gun, 5.0 CFM @ 90psi), the wrench, drill, chisel all work fine.

I picked up a 20 gallon Campbell-Hausfeld receiver tank thinking that if I ran the smaller compressor into the receiver I could build up enough CFM to run the impact gun for a functional amount of time and reduce the duty cycle on the small compressor.

I understand that the tank will take a while to fill but theoretically should work once it's full.

The problem is that the receiver tank doesn't seem to be building any pressure and I can't detect any leaks even if I shut the compressor off after 15 min.

Although I do hear the air from the smaller compressor going into the tank, I know that the problem is with the receiver.

A few questions:

1. Is this even possible and am I going to harm my compressor?

2. I suspect that there is a problem with a check valve on the tank, it has an auto moisture valve and a pressure gauge/dial on the output to the tool, I am having a hard time determining where the leak is, if there is one, do you have any suggestons?

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Bill says...

Vince, regarding #1, is what even possible? If you mean is adding a second tank even possible, go to the site map, and look under tanks, for the link to Adding A Tank.

With reference to your air compressor not building enough flow for you, check out, also from the site map under Electrical Issues, Compressor Power Supply to learn why you cannot get to the kind of flow you want from a 120 volt compressor.

Regarding #2, I cannot see how you plumbed in tank two.If you simply plumbed from the discharge on the air compressor, taking air from where the original discharge coupler would have been, and then, are taking air from the second tank, there is no good reason why you aren't getting air into the second tank.

I need a bit more information about how you plumbed it, or, perhaps, the links I referred you to, can provide a solution?

If you wish to discuss this further, please add more info as a comment here so I can follow our discussion.

Cheers,

Bill

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