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.