Hi guys. I recently completed my 75 gallon tank build. For the heater, I got the highly rated Popetop upgraded submersible. Now I am on vacation. A couple days ago, I saw on the little camera we got for the tank that the heater was flashing code e2, which implies that the temperature in the water was over 94 Fahrenheit. I was extremely concerned, but the fish seemed to be good. Later I had my dad, who went home early touch the tank and the water and he said it was cool. I figured that if he turned off the heater and back on again it would resume normal functioning but it did not and is now showing e2 again. Is my heater broken? For a second after he turned it on it showed it’s normal display but then went right back to being broken. Anyone know what to do?