Originally Posted by awarnes
The one on the right is for electric and the other works off of propane. I have 2 switches also. My electric sides does take a bit longer to heat then propane, but is nice in that I can have it on and not worry about using up propane and I get no noise when heating.
Beg , to differ, awarness, the left switch is 110volt and the indicator lamp will stay on when being used.
The Suburban switch on the right is the propane control, and depending on the year , the indicator will be on when the propane is igniting, and flash on whenever the tank re-lights or stay on constantly after it is turned on.
For an owners manual take the model number and production date off the H/Water heater and visit the Suburban web site for a download.