Pressure switch contacts keep burning out.

by JB Johnson
(Sidney, Ohio)

I have a 5HP Sanborn air compressor that keeps failing the pressure switch every month or so. I am on my fourth in the last year. The switch will stick "ON" because the contacts will burn and weld together.

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Aug 19, 2015
contacts
by: Doug in s.d.ca

Do you have a specific model number?

In addition to what Bill asks, you may want to check the motor capacitors - possibly one is failing, causing excess amperage.

Aug 19, 2015
Compresssor contacts keep burning out
by: Bill

What's the supply amperage, distance from power source to compressor, and ratings for the pressure switch you are using, please?

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