07-25-2017, 02:03 PM
Sounds like it might be a faulty pressure switch. Check to see if power is available at the pressure switch in both positions of the rocker switch. If so the rocker switch is also faulty. It should disrupt power in the off position. The pressure switch should pass power to the compressor at +/- 70 psi then disrupt power at +/- 90 psi. It will not re-enegize power until system pressure drops below the +/- 70 psi start up.