I just picked up a new GX CS3 compressor and it doesn't seem to pump air. I plugged it in, turned the fans on, set the pressure, then hit start. It lit up green like it thought it was going to do something, then never started pumping air. I made sure everything was tight, emptied the bleeder valve just in case, and nothing happens other than loud fans. Anything else I can try? I'm hoping I'm just missing something simple!