AnEv Initially I removed the flare nut #48 thinking I would be able to slide the whole thing off. The only way to get to the burner and orifice is to remove the metal enclosure #26. ( Maybe that slides towards you.)I removed screws #52 and the box didn't move. As you can see the burner tub slides into #25, another obstacle. Looks like I need to move 29 and the flue just to get the box off. I hesitate to start tearing the whole thing apart then find the frig has to come out. Any thing to make it difficult. I will take another look and get back to you. Thanks