You will need a new orifice for LP based on the furnace's btu design and your elevation. You will also need a manometer to verify and adjust the gas pressure. LP uses a bigger orifice and higher pressure. Contact a Coleman dealer for the right orifice. Manometers available online

Maybe a valve, change the thermocouple first

Hi, I'm an HVAC tech but very limited experience with MH installs. Just installed this unit and the side panels were getting really hot, as well as the lower door. I cut power to the unit. It was getting late in the day and I will return in the am to check some things out. Thinking I will verify gas...