When I turn aux air circuit breaker on pressure builds up to 55 lbs, then shuts
off and air starts gushing out right away with a lot of noise and sounds like its coming from inside the compressor. I have checked all connections and cannot see or feel a thing and the noise is 18 inches from me but I cannot see or feel inside of compressor.. IT leaks down to 50 lbs real quick then starts over and does same thing over and over and etc.If I turn circuit breaker off after it leaks down to 50 lbs it will hold that between 45 and 50 for several weeks.

Do compressors have relief valve when pressure gets over 50 or so lbs?

Do they have an adjustment to limit pressure to 45lbs or so?

Any ideas greatly appreciated! Dan & Jo