I have a 1995 Fleetwood Bounder. Last night I went to flip on the gas from the LP Gas Detector and it started to beep but no Green light ever came on. In my previous RV it would beep for 10 seconds then stop and I would have gas. This one started off with a slow beep then progressed to a rapid beep but still no gas. I believe the Solenoid shut off valve is bad and just staying closed. Thoughts? All the batteries in the coach are brand new and good.