I have a 2017 35K Bounder. It has an electric fireplace, but the specs also says it has a furnace, I can not locate the controls, looking for assistance on where they might be or if they even exist. Spec also say rear A/C is also a heat pump, and describes controls I am unable to locate. The only controls I can locate anywhere would be the thermostat and zone control above the entry door. Looking for assistance from a veteran on this issue, Thank you in advance