Air Compressors

Yunkman,

Are the contacts where the motor is turned off/on in the pressure switch box are they in another box? Presumably the contacts have an air line running to the box as a pressure sense line? If the box with the contacts doesn't have an air line to it, you might have a setup where the pressure switch was remote mounted. In this case, the contacts that control the motor would be controlled by a magnetic relay that used 120 VAC or some lower voltage DC, like 24V.

If the pressure guage line was plugged with dirt on the inside, the line going to the pressure switch may also be plugged. You might even have to take apart the pressure switch itself to make sure the diaphragm is working correctly and air is getting right to the diaphragm.



A few photos would help the troubleshooting effort a lot!

Jon.

Thanks boys, for the tips. Although I blew out the pressure switch, I didn't take it apart to make sure the diaphragm was in operating order.
A picture will be forthcoming.