Jobsmart Air Compressor Won’t Reach Cut Off pressure – Solutions & Causes

Published Categorized as Air Compressor Not Reaching Cut Off Pressure, Jobsmart 3 Comments on Jobsmart Air Compressor Won’t Reach Cut Off pressure – Solutions & Causes

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Jobsmart TA-25100VB pressure will not build past 50 psi

by Richard
(Wetumpka, al.)

TA-25100VB will not build pressure past 50 PSI. The motor changes sounds. No leaks.

Jobsmart TA-25100 VB air compressor
Jobsmart TA-25100 VB air compressor


Jobsmart sound changes
by: Doug in

That happens right around the time the pressure stops rising, right?

Then while there’s no external leak, you probably have an internal one.

If there’s no air coming from the oil fill/breather cap, then the rings are probably OK.

That leaves valves. Check that the head bolts are not loose. If they are OK, then you’ll likely need to remove the head. You’ll find one or more broken “flapper” valves in there. Or, maybe just a bad gasket that gives at 50psi. Either way, replace what’s broken (you’ll need to replace the gasket, at least), and you should have it fixed.

Good luck.


Same issue TA-25100VB flapper valve
by: Jesse

I was able to track my air leak to a broken flapper.

Do you by any chance have a part number for both the gasket, and the boomerang shaped flapper?


Jobsmart compressor parts
by: Doug in

you can download the manual from TSC. There’s a parts list, but I don’t know what, if anything, is actually available.

Good luck.

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My 2 gallon job smart compressor was working fine then all the sudden quit making pressure at all on the gauge or putting anything in the tank , I can open the drain valve and nothing , I can disconnect the line from compressor to tank turn on ,hold my thumb over the discharge and feel air blowing with pressure out .push against it and here the motor labor . I’ve blew through the line and seemed clear and blew into the tank and feel air co e out of other hole but nothing when reassembled will blow out the… Read more »

Last edited 1 month ago by David casey

Does anyone know of a flapper/gasket kit that will work for replacements for this?

If they do, it has not been mentioned here….
Maybe you’ll get luck, though.