Old Buiscuit, I think you're right. I bet that switch isn't to warm the waste tanks, but rather, for the hot water tank. I'll have to confirm it the next time we head out, but this makes sense.
Well, thanks. Every bit of info is helpful. The switch is on the lower left, and it is the only switch. I'll look, but I don't think there is a gas switch anywhere inside. Other than lights, slide outs, canopy, the only two switches are for the water pump and heating the tanks during cold weather.
I bought it new and got it very late in the year 2009.
For now, I can continue to unplug a lead to the gas valve, I guess.
I only see one switch. It's a 'rocker' switch.
And the wire I pulled off was attached to what appears to be some kind of a solenoid, which I imagine is there to start/stop gas flow. There are two wires, which have two connectors each, attached to what looks like two identical solenoids or valves, side by side. There are no other visible wires or switches.
I have a 2010 5th wheel, made by Keystone.
I turned off the water heater switch earlier this year because I drained the tank and didn't want to burn out the electric heater. I assumed the same switch would turn off any possibility of the gas heater, too, but on my way back from the Gulf, I walked by the trailer at some point and discovered the gas heat was running. On an empty tank.
Maybe that has happened before and I didn't notice it. I pulled a wire loose and that stopped it instantly. I recently de-winterized it and did a shakedown local camping trip; hooked up the wire and turned the switch back on. The heater worked fine on electricity.
SO . . . the question: should the gas heater work when the switch is turned off? Any thought about what is wrong, if anything?
(I should note that the sheet metal around the water heater was replaced last fall, following a tire blow-up, so the heater may have been removed during replacement.)
For whatever it's worth, I have a Curt hitch in a short bed F250. Bought it late 2009, I've been all over the US with it, approx. 35,000 miles to every corner of the country. In the first year I used the slider a couple times. I've never used it in the last 4-5 years. In retrospect, I really didn't need it the first couple of times, either, it was a confidence issue.