Pressure Switch: more information.

This is the second page in the series on Compressor Pressure Switches.

Here is page one.

Unloader Valve

In the photo left, you can see the unloader valve on the side of the pressure switch.

The unloader valve is toggled by an appendage protruding from the side of the switch. Depending on the condition of the pressure switch, that appendage moves up and down, and in so doing, operates the valve by depressing or releasing the pin protruding down from the valve.

Here is detailed information on the Unloader Valve.

Troubleshooting The Pressure Switch

One is often confused as a pressure switch or unloader valve leak. In the event your pressure switch or unloader valve is bleeding air constantly, the problem may not be either.

The compressor check valve may be the issue. Here is info on that problem.

And, if you are having trouble with your compressor pressure switch, here's a pressure switch troubleshooting page to help.