There are bolts holding the side brick retainers in pull them and the side bricks. The the retainers for the back bricks pull them and the bricks. Then the shoe brick. Now you will see 2 metal plates on either side of the back with 2 bolts each. This is the fun part. Pull the insert out and remove the shroud so you can get to the loose nuts on the back side of those bolts so you can service the stove. It is quite honestly the stupidest design i have seen in a long time. I always bring a welder and weld those nuts fast when i do it so the stove can be serviced properly. Try the bolts first in case they changed things but the new one i installed last year was still that way.Could anyone tell me how to remove the firedome on the Harman 300i insert? I know the stand out models like the Harman TL300 come out through the back, but there are no bolts on the back of the 300i. Any help is greatly appreciated!