I went and turned the furnace on Thursday and set the thermostat at 40, I have the RV winterized so this was just for precaution it was supposed to get down in the teens the LP gauge showed 2/3 tank e...
Propane works fine well down into minus temps, so that's not likely the OP's issue. A mis-reading monitor panel gauge seems probable. If the stove burners don't light either, than the tank is likely empty. As said, the mechanical gauge is on the side of the tank near the fill port.