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Guide :Air Tools & Compressors : EC12 Portable Electric 2hp Air Compressor, Oil Lubricated

My EC12 builds up pressure, but then releases all but about 10 psi.

The machine builds pressure fine, but when it reaches max (125 psi), it releases all but about 10 psi.  I initially thought that the spring loaded pressure relief valve had went bad, but the air comes out of the small hole in the brass fitting below and to the side of the relief valve.  I am not sure if this is a pressure sensor or not, but it has a small air hose from the tank the pressure switch.  Any ideas?

Research, Knowledge and Information :

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