Testing tanks, pump, LP, water heater, heater/blower, fridge

A simple method to check your propane level is to pour a pot of hot water on the outside of your propane tank. No, this isn't a joke — feel the tank afterward, and where the tank is hot, it's empty. The cold part of the tank indicates that it's filled with propane. Similarly, if you're camping in a cold climate and part of your propane tank is frosted over, the propane is usually where the frost is.