My Craftsman air compressor kicks in at 120 but takes a super long time to reach 150 cut off. No accessories connected. Also drains down when not in use for a day or so??? Its a 150 psi 15 gallon 1.5 hp

Fred Slickmeyer, December 2007

You can, also, to add to other answer, get a spray bottle and mix 1 and half parts dish soap to one part water. than spray the fittings, where you see bubbles appear, you have a leak.

Michael, January 2008

I would first Check for a air leak,when its running. Its hard to hear while running ,its easier to feel around all the fittings,where hoses plug at,at drain plugs,at releif valve. If it loses air while not in use that usually means a leak. Alot of the leaks are even worst with the more psi. I would even check the factory welds & seals that are manufacture made. Hope this helps

Sean M, December 2007