26 gallon JobSmart only builds up 25 psi and it cuts off
by Joe Velasquez
Compressor only builds up 25 to 40 psi and it cuts off. Will not start up until you release the air in it. Sometimes it will start if tapped lightly.
Compressor is about 2 years old and its a 26 gallon JobSmart.
Sounds like it could be a number if issues with your compressor Joe.
Regarding the cutting out at 25-40 PSI; that suggests that you have a failing pressure switch.
That is sometimes won't start with pressure in the tank unless you "tap" it suggests that your compressor has an unloader valve issue.
If the compressor starts with no pressure in the tank and stops at 25-40 PSI, does the unloader valve trip open? If so, then, for sure, the pressure switch has a problem.
If the unloader valve does not trip when the compressor stops, first replace the pressure switch with one that cuts in and cuts out at similar pressures as your compressor did before the problem.
I suspect the new pressure switch will allow the compressor to run up to normal cut out pressures, and if so, ensure that the unloader valve works when the pressure reaches the normal cut out level.
See the pages on this site about the unloader valve and pressure switches for more info, if needed.
Jobsmart model ZJ3040SA compressor pressure
Bill, I have a Jobsmart model ZJ3040SA and in trying to use it yesterday it would run to about 50# and that was it. It would not shut off, or make any more pressure. There is a small valve on top that was leaking air, and air seemed to leak out the intake when I shut it off.
The machine is about a year old, and the place where the serial # was is rubbed off.
Came from Tractor Supply, and has always been a good machine till now. Even though I rarely use it.
Jim, see the troubleshooting section. See why air compressors run and don't build pressure.
Things to check and possible issues are noted, along with some resolutions.
Once you do the checks, if you find something, and are not sure how to proceed, and it's not already covered on the site (probably is, though) add a comment.
TA-2040 will not restart at manufactures restart point
Brand new, I have had it for about 1 mounth. When in use it will not restart at manufactures restart point. Acts like it is under a strain. When I let the pressure below restart point it will start, cannot use it as is.
Empty the tank once again then start the compressor. Monitor the unloader valve to be sure it operates when the compressor reaches cut out and stops.
See the unloader page for details if you are not sure what it is.
Post a comment here is the problem is not the unloader valve and we will check further.
Jobsmart 25100vb vertical Starts but does not stay running
by Craig White
JobSmart air compressor from Tractor Supply
When I turn on compressor it runs slow for a few seconds then shuts off. I have to unplug the compressor and wait for its circuit breaker to reset, and then try again with the same results. It is a Jobsmart 25100vb vertical. Thank you Craig White
As a comment here, Craig, tell me about how you've got it plugged into, and what it is plugged into.