Compressor shuts off before reaching pressure
by jon dee
compressor shuts off without reaching full operating pressure (circuit breaker trips)
Make sure the power supply to your Harbor Freight air compressor is "clean". By that, I mean no extension cord being used, and no other appliances pulling power from the same circuit the air compressor is on.
If the problem persists when you have clean power, then it might be a failing pressure switch allowing a short and popping the breaker, it could be the motor is laboring and pulling too many amps, it could be the start/run capacitor isn't working right... many things.
What pressure does it reach before the breaker pops, and is the breaker popping at the same pressure on the compressor every time?
Post a response here please, if you wish, so I can follow the thread.
internal pressure regulator
by Jack Schauf
(Collvile wa 99114)
The internal on my new model 67847 21 gal compressor. shuts off at 40 lbs. I want to know if therev\ is an adjustment capability that is owner friendly. I live a good distance from any outlet and need my compressor. The one time i tried it was to air up a truck tire had to keep waiting for build-up. the line pressure regulator sets to 90 lbs.
Hello Jack. I'm not sure what you mean by "The internal" on your air compressor?
The device that turns your compressor on at low pressure, and shuts it off at the high pressure, is the pressure switch.
Have a look at the PRESSURE SWITCH page and see if what it says is what you are looking for, OK?
Add a comment if that's not what you mean.
the compressor takes along time to pump up pressure and won't top off
by Don Gallipeau
(Deridder, La. USA)
The top off pressure is 120 lbs, but the compressure only builds up to 100 lbs and won't go any higher, (and this takes over a half an hour) I figure the compressor is wore out, the motor is good. is there any way I can buy a compressor or get the parts to rebuilds the one I have.????
Thank you for your time & consideration.
Don, it would be worth your time to look at the troubleshooting pages on the sitemap page, and read the one about why air compressors run but don't build pressure.
There are a number of reasons why an air compressor runs but doesn't build pressure, and they are common to many of the Harbor Freight air compressors too.
You don't provide the model, so I cannot comment on parts, though if you do a browser search for your compressor model number, I suspect you'll find a number of sources.
100 PSI PANCAKE COMPRESSOR
Will only go to 80# then shuts down. Borderline pressure for my nail gun. I contacted HF parts. They told me the pressure switch which appears solid state can't be ordered.
Do you know where I can get the pressure switch?
Since I don't know the model of your Harbor Freight air compressor, I cannot advise you, Larry.
With a model number I (or you for that matter) can do a search for parts.
Depending on the style of pressure switch, there are quite likely a number of outlets that offer a non-OEM switch that will work just fine.
And yes, typically, if your air compressor is shutting down before the cut out pressure is reached, then it is likely the pressure switch at fault.