Tonight was the second time a thermostat probe fell off a UTH. The heat is melting the glue on the aluminum tape and gravity pulls it down. The temp shoots way up to 115 degrees. I was lucky both times and caught it right away. It happened on the hot side (93) and the cool side (83).

How do you stick the probe to the underside of the UTH on a tank so that it doesn't fall off?

Also, I read somewhere that you can use a dimmer as a backup in cases like this. How does that work?

Thanks.
JohnNJ