The igniter switch for gas is on the 3-switch status panel. One of the switches is labeled "water heater". The indicator lamp color is green, the ignition warning lamp on the panel is red/orange.
The standard (unidentified) switch with the orange lamp you refered to at the counter is for the electric heater in the water tank. Just because the lamp is lit doesn't mean you are heating water however! You must turn on that other switch in the outside compartment - in order to do that, you must pull the pin out of it's handle to prevent your turning on that switch by accident.
The purpose of all this is to prevent applying power to the element with no water in the tank. It will burn out the element. The madning thing is that the unidentified indicator comes on regardless of whether the element is working or not. GS took the cheap way out by saving the cost of about 4 foot of wire.... and it beats me why they have never labeled the switch; it remains "the mystery switch"
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