Reading through the literature, we've found that our heater is a propane heater, not electric. Interesting that they should do this in a 5th wheel that has the arctic package. But anyway...when we were setting up our 5th wheel, it was discovered that there is a problem with the propane auto-crossover and the regulator. The red pop-up indicator that reveals the cylinder is empty was showing, and after I filled the tank, it didn't change. So, I s'pose we'll get a couple of electric space heaters and tackle the propane system tomorrow.