pressure going too high - PRV blows

by Scott
(Dulles)

The compressor is exceeding the required PSI then blowing the relief valve.

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Bill says....

Scott, the likely cause is that your pressure switch has failed on the high pressure cut out.

It were mine, I wouldn't use the air compressor again until I had replaced the switch and/or resolved the issue.

Loss of the high pressure cut out leaves only the PRV to protect you from a potential catastrophic event, and for me, that's not enough protection.

Cheers,

Bill