Air compressor never shuts off

[Gadget470]

check for leaks. If you didn't put teflon tape on all of the brass fittings, that could be part of the problem. The tape acts as a bit of a lubricant to make the fittings tighter without damage to the threads thus making a tighter seal.

If you aren't sure if your system is leaking, crank up the pressure to 60-70psi (which you say is your current max) and, with wet fingers, hover your fingers over each fitting closely. (Wet fingers make it easier to feel the air when it's a light leak).

A better way to do this is to take soapy water, stir it with your finger and wipe it around all the connections. If a connection starts to bubble, then there is a leak.