John,
I believe that year coach had an LP detector that also had a shut-off solenoid located at the LP tank. Before you do anything, try lighting the stove. If the stove won't light, go outside and make sure you have propane and the shut off valve is open. Locate the detector inside and flip the switch off for 10 seconds and then back on. It will beep 2 times a second for 15 seconds then you should hear a click at the LP tank. Try and light the stove top. If it does, now try the furnace again. Hope this helps, Fred