These Suburban water heater switches are bad about doing that. If it's stuck in the ON position, you can usually just control it via using the circuit breaker to the water heater in your RV control panel. Turn off the water heater circuit breaker and it will turn off the electric heating element
The switches are around $10 per and aren't hard to replace.
LOL. It's all good, as we are all trying to help the member. Can't have too much of a good thingLOL. you beat me to it. I think I referenced one of your old thread answers.