Wow! I logged back in an there are a lot of helpful messages!
I have not checked anything except the battery was at 12.0v. This weekend I am installing solar panel, inverter and multiple batteries. However, before I start that install I will for sure make sure the furnace is working. Below are my answers to various questions asked
1.) There is no battery cut off switch. Planning to install one.
2.) Thermostat fan set to auto. I just learned about that the other day!
3.) Checked fuses, all good.
4.) The furnace was tested once to show me how it operates when I bought the unit back in June. It was plugged into shore power. I have not tested it plugged in yet. This weekend I will. I know the A/C works when plugged into shore power.
5.) I never heard the unit try to ignite and the fan never came on.
6.) Yikes on the smells that the furnace may produce. Glad you told me that and I will do that.
7.) Ha, that loud beep from the carbon monoxide will wake anyone up! I had that happen with the battery dropping to low before because the batter connectors were loose. The camper has way to small of a battery.
8.) Reset switch... yes, now that you mention it I do have one. I will post pic this weekend. I now remember the dealer saying something about resetting the switch if nothing happens. I will try that first.
Hope this answers y'alls questions. I will work more on it this weekend and post back. I am kind of excited to work on the camper this weekend lol.