[rohrmann]

The year and model of the Montana that has the problem with the thermostat would be nice to know. Our original water heater had a problem similar to this early on, but out of warranty. I finally discovered the 120 volt thermostat had failed, and I found a new one and was back in business. The old thermostat had a red insulated barrel that was the button under the rubber disc. The replacement thermostat, a Suburban part, had a gray barrel, which I thought was strange. I later found out that the thermostats are made for Suburban, and the ones with the red button were defective and failed quite often, and they were made by a company that does not make them for Suburban any more.