I removed the two screws on the sides of the door and tubes coming out from controller. However, the combustion door still don't want to come off so that I could service thermocouple (I have seen how this is done for other water heaters and access was easy in those cases). There are no other obvious screws that I see on the doors.
I found this "PARTS ORDER LIST" (although mine water heater Model # is 153.330952).
It shows parts, but it really does not explicitly point what else could be preventing the doors from coming off.
- Could it be that door gasket due to temperature is simply stuck and I need to apply some force to remove the doors (or pry with screw driver)?
- Is the gasket [factory] glued by any chance?
- Any other ideas how to get to thermocouple?