03-24-2013, 01:53 PM
To me that looks like the governor. That , I believe, is the control That unloads the compressor when it reaches the desired pressure. I would start by just shutting down, dumping all air pressure and then starting up again and seeing if that fixes it. Governors are not expensive, depending on the model, as cheap as 20 dollars .
Peter Haggins
Courtenay BC
Canada
96 Wanderlodge 42' Mid Door