A compressor is a device that draws in a source air (or Freon gas) and then compresses it by way of a piston traveling up as the valves are closed. The exhaust valve open and drives the now compressed air out. The crankshaft that moves the piston is often spun by a pulley and a belt. On an A/C compressor the belt spins freely on he pulley till the clutch (part of the pulley assy.) The clutch is electrically run and used a magnetic field to engage and disengage. A compressor for air simply runs full time till the air pressure in the tank reaches the set number (usually 120 psi) and at that point it either turns off the electric motor driving the belt or a bi pass opens and releases excess air out in the open air.

On larger cheap ones the belt drive often needs attention if air compressor!

Where is the compressor? How is it being used?

Collecting water from the air then rusting out the bottom of the tank.

Potential for an explosion with rust holes. I have to drain the tank constantly in high humidity.

You have a compressor with problems? Air? AC? Strut? What kind of compressor. Elaborate please.

Not compressing is the main problem.

I've never heard of it.

What is your question

they don't work or no freon