Ok my older 1hp 125psi craftsman compressor stopped shutting off by itself at set pressure kept going til safety valve blew. So I had no air so I went to see why. Motor was barely turning I tried shutting off with switch but nope so I unplugged  it. Left it and used other compressor for a day and that 1 had an issue. So went back to original unit and it came on like always when I plugged it in just failed to shut off by itself at set pressure. I suspect pressure control box but don't understand what's wrong with it can it be repaired wiring looks fine.