Place the Atwood door key inside the door lock on the exterior of the RV and turn it one quarter turn counterclockwise to open the lock. Swing the door down on its hinges.
Place a small flat screwdriver on the air shutter screw to adjust the main burner flame. The air shutter screw is on the left side of the hot water heater in a small round hole. Turn the screw counterclockwise to loosen it but do not remove it.
Slide the air shutter to the right so that there is yellow in the main burner flame. The air shutter is a thin metal plate just to the right of the air shutter screw.
Slide the air shutter to the left until all yellow flames disappear and the flames burn blue.
Place a small flat screwdriver on the air shutter screw and turn it clockwise to tighten it.
Close the access door by lifting it up, inserting the key and turning it one quarter turn clockwise to lock the door.
