I have a 2015 Reflection 323BHS and the thermostat has a button on it called "Furnace" that also has an indicator light next to it. Is this button used for my camper because I can't get it to do anything. The heat works fine when I set the mode to heat, fan to auto and then set the temperature.

Click image for larger version.  Name: Camper Thermostat.jpg  Views: 63  Size: 53.3 KB  ID: 1091