Welcome to the forum! If your rig is normal, there is a little black switch in the compartment with the heater. When that switch is on and the inside switch is on electric the heater will work on electric when the rig is plugged in. If at least one tank is open and has LP in it the heater should light when the inside switch marked propane is on. You should light the stove first, to make sure the air is out of the system.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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