We have the same setup. The one with the light on it is the propane heater. The one on the right is the electric heat. If the light stays on, there is something wrong with the propane part. We have to get all the air out of all the lines before the propane part will work. I'm late to the party here but if you don't have an answer yet, I'll check to see which is on or off on the switch to the right for the electric heat.