Sears Craftsman 33 gallon air-compressor. Model# - 919.167342 compressor won't shut off, pressure stops at 40 PSI
Sears Craftsman 33 gallon air-compressor. Model# - 919.167342.
Compressor won't shut off automatically and pressure will not increase beyond 40PSI.
I've replaced the check valve, regulator, and the pressure switch and the problem continues.
I cannot hear any leaks when the compressor is shut off.
I've left it run for over an hour.
Any thoughts on what to look at next would be appreciated.
"I've replaced the check valve, regulator, and the pressure switch and the problem continues. " Quite likely, none of these have to do with your air compressor not building pressure problem.
Your problem is common, and I've written about it. You are on the page linked to a sort of check list of issues that cause this type of air compressor problem.
Could you please post here as a comment what you have found when you looked at the various issues that the page suggests? Not much point in me reprinting it here again.
sears - builds pressure to 175 then shuts off
new pressure switch and it builds pressure to 175 then shuts off but the compressor has pressure and wont let it start again
When you installed the new pressure switch, did you ensure that the unloader valve was working?