Craftsman compressor will not go past 105 psi
by steven fox
I have read through this website and it has been very helpful. Thank you. I have a Craftsman 150psi max compressor. It will build pressure (rather slowly) until it gets to about 105psi. The motor will keep running indefinitely but the pressure will not go any higher.
So far I have replaced the pressure switch, valve plate assembly, pump gaskets, and various o-rings and seals.
Nothing has worked. It holds pressure and I don't hear any leaks when I turn off the motor.
I can't feel any leaks while the motor is running.
The unit is plugged directly into the outlet and I run it alone on the circuit so it should not be under-powered. I do not feel air coming out of the intake.
The only other thing I can think of is the piston assembly in the pump. Could air be getting past the piston ring once it gets up to a certain pressure? I wanted to ask before I through any more money at this thing. Thanks in advance, Steve.