I did the same thing. RTV the slits in the body by the #`s. And felt behind the slider door . My temp control is awesome now.
Did a venison roast Sunday night to a perfect 140 degrees. Akorn temp was 275 on the button.
Char-Griller Akorn, Brinkmann Electric Bullet Smoker w/homemade PID, Charbroil Gasser