Our newest problem, being that since we have had this unit since July 2011 and had NUMEROUS, is the heater. The furnace blows cold air, we have the wire over the vents so nothing can get in and clog, and we have a full bottle of propane. Turn the furnace off and use the HP and it displays a code that is DEPH and shuts off but the fan makes a loud noise. Very disappointed in this unit. We have had several 5th wheels in the past and this is the worst by far. Not to mention, the thermostat IS NOT user friendly! Any suggestions? Warranty is a joke, try finding someone that wants to deal with Heartland Warranty.