Dometic Furnace Temperature Range

Page 8 of this link to manual tells you how to change the differential setting

https://www.forestriverinc.com/brochures/0000/0000ThermostatSingleDometicManual.pdf

Hmm, funny thing is I think I accidentally adjusted that when I was playing around with it. I did see a D1 and a D2 come up while I was trying different button combinations. Afterward, I've noticed that the controller clicks on and off over and over for a while before turning the furnace on. I think I'll try putting it back to D2 and see if that fixes the issue. It seems to me that it's waiting for more than 2 degrees before turning the furnace on, because I end up having to put on another layer for a bit before the controller turns on. I'd rather live with that though than the obnoxious clicking, assuming it's because the D1 setting is too narrow.

AS you have found out, The D is just 1 to 2 degrees. NOT what you actually want. Other than the D setting the tstat cannot do what you want it to do. The only other way is to remount the Complete tstat in a different location, that more accurately senses the inside temp. Doug