I have an Ingersoll Rand Type 30 air compressor. It’s 7-1/2hp single phase 240v.

When I first turn it on, it will run for a few minutes until it pressures up to 150psi then shuts off. If you release all the air down to 0psi, it doesn’t come back on. You can force it on by holding in the little reset button on the contactor, but as soon as you release it it shuts back off. If you let it sit for about five minutes, it will then start back up.

Is the contactor going bad? Any suggestions on how to trouble-shoot?