I have a Husky 13gal air compressor. It builds up to 50PSI and no more. It also will not stop runnimg.

My13 gal air compressor builds up to 50psi and no more also i5t will not turn off and keeps running. When I manually turn off the compressor it will hold the 50psi and not leak down

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Bill says...

You have a leak, either internal (gasket) or externally (valves), or your piston seals are worn to the point where it cannot compress air, to think of just a few.

On this same page is a link to a page that explains about the common reasons why a compressor won't build pressure. The link looks like this:

I've just added a page that summarizes many of the answers about why a compressor won't build pressure. That page is right here.

Go back to the page, click the link, and have a read. See if any of the symptoms mirror what your compressor is doing.

Cheers,

Bill