Quote Originally Posted by 06gt View Post
i had already stuck my uth to the tank and realized i didnt put the probe between. so i just stuck the probe to the underside of the uth on the outside of the tank and taped it there and it is working good!!
As this may work, the point of the probe is to detect the temperature that the heating device is putting out. Also a probe placed like this is more open to the ambient elements even when taped vs a probe covered by a uth. It may cause problems or it might not, but the point is that it could.

Peeling the UTH back once is not a big deal and it is better to do it the right way.