[Chamner]

The light switch with the red indicator is the electric power on switch for the water heater. I leave it on as well as the gas for better revovery on hot water. As far as the AC front and back, i've found the house has a much better even cooling id you leave the quick cool large vent closed and let it cool through the snall vents throughout the house. The thermostat locations being so close to each other with the quick cool vents open they fight each other. They make a digital upgrade for the ac/heat thermostats that make life easier if you have the old analog. Check youtube for the installation video. I think it's hillbilly rv??.