DeVilbiss compressor slow starting and venting on starting
by Dan Huttunen
My air compressor is a large, older deVilbiss 2-stage.
When starting, the motor is lugging as though there is a lot of resistance from the compressor and the valve releases air in short bursts repeatedly.
After 15 to 30 seconds of that, the motor speed increases, the release valve stops venting and the compressor runs normally up to full pressure.