
44
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
HEAT EXCHANGER DOOR SEAL
The heat exchanger door seal must be in good condition to ensure an
airtight seal. If replacement is necessary due to the door seal becoming
damaged or brittle, use the following procedure:
1. Press the Power button on the FireStar combustion controller to
turn it off.
CAUTION
Be sure to turn off the FireStar combustion controller before doing this procedure.
2. Remove the heat exchanger access cover from the back of the furnace.
3. Carefully undo both latches on the heat exchanger door; then slowly
open the door making sure to stand clear of the opening.
CAUTION
Open the heat exchanger door slowly and stand off to the side when opening it.
4. Using a scraper, remove the heat exchanger door seal rope and clean
any remaining silicone adhesive from the groove. Any residue left in the
groove will interfere with the new seal.
5. Apply a liberal amount of silicone sealant into the entire heat exchanger
door seal groove.
6. Starting at the center of the hinge side of the heat exchanger door,
insert the new door seal rope into the groove, pressing it firmly into the
bead of silicone sealant. Make sure the door seal rope is not stretched
as it is pressed into the corners. Force the door seal rope out to fill in
the corners as shown.
7. When the seal has been pressed into the groove all the way around the
heat exchanger door, cut the end of the rope about one inch longer than
required and press it tightly against the beginning end of the rope.
8. Close the heat exchanger door and secure with latches. Install and
secure the heat exchanger access cover.
Heat Exchanger
Door Seal Rope