TT appliance how-to's needed (NEWBIE ALERT)

SailingOn wrote:
On each camper I have had lately, the water heater electric element has had two switches, plus the circuit breaker on the main panel.
A switch on the water heater itself is for maintenance, normally left on all the time.
Another switch inside the camper - in one case hidden under a cabinet, and unlabelled - is the one generally used to turn the electric element on and off.
Propane is controlled by a lighted switch on a panel near the door. A smaller indicator lights when this switch is turned on then goes off if the propane flame lights successfully.

Thanks - but there in lies my confusion.
I have a switch with a light below it on the wall above sink. Labeled Water Heater.
The switch and the light are in the same switch cover plate.
But the water heater doesn't appear to have any electric spark.

Thanks!
Jw