I just bought a compressor pressure switch on Ebay after the elrctrical contacts in mine failed- - - -just make sure it's got the right setup of ports and the correct on/off pressure rating. They're not expensive, or complicated to install if you've got a little basic plumbing and electrical knowledge.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!