Yes any compressor should have a high limit switch that shuts it off at a set pressure.
Now if it is running without shutting off it could be a leak on the high side, poor compression, worn out, within the compressor, or a bad shut off switch.
I would suspect on of the first 2 since a bad limit switch would cause excess pressure and should pop off the safety valve on the reserve tank.
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WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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