Air compressor won't build pressure

by mike

My air compressor gets air from the motor but don't put any in the tank.

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Jul 31, 2016
Compressor will pump up to about 20 psi.
by: Randy

Central pneumatic compressor 90234. The compressor seems to run find, but it only pumps up to 20 psi in the tank. Will not pump to the max. level. It just keeps running and will not pump over 20 psi. Just need a little help to fix it.

(Please see - - start a new thread, and tell us what your findings. Moderator)

Jul 11, 2016
There's good pressure coming from the hose
by: Bill

Still puzzled, Mike.

If you've got good pressure in the hose, then your compressor is able to keep up with the demand of your air tool.

It is likely then, but I'm really not sure from what you've posted, that the compressor can supply the tool but if you are using the air tool, there is not enough air capacity to fill the tank at the same time? Is that it?

What happens if you just run the air compressor?

Also, are you sure the tank gauge is working? What pressures are the two gauges showing; the tank gauge and the regulator gauge?

Jul 10, 2016
by: Mike

There's good pressure coming from the hose. But it's not building up in the tank

Jul 08, 2016
No Pressure In Tank
by: Skeeter

Jobsmart ta25100vb motor runs fine but it will not build up pressure in tank

(Please see:

Jul 07, 2016
Gets air from the motor
by: Bill

Mike, I have no idea what you mean when you say your compressor gets air from the motor?

Are you saying that the pump is pulling air into the intake, and you've pulled the line to the tank from the pump and are getting good pressure out of the pump?

Regardless, here are a couple of pages that may get you started. Please read them and the postings, do the checks, and add a comment here with what you found if you wish.

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