This is a piece of junk. The spring and clip they sent you to install just doesn't work as advertised. I literally spent two hours fiddling with it according to the instructions. I finally realized that it just never works. I ended up just pushing the tabs back out a bit and jamming them. Proud of me! It was definitely against the tank. Turned the heater on and didn't turn it off. I have ordered another one. Same result. In the end, RV Tech took care of it. The first comment was "Yes, they rarely work". I replaced it with a new normal thermostat and presto.off at 140. Which of course is higher than we would like. what was the point. But it works.
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