Heatmax Furnace Installation and Operation Manual
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5.1.4 Replacement of the glass and gaskets
After a year or more of use, the gasket of the door will compress and become hard which
can allow air to pass. You can check the air tightness of your door gasket by closing and
locking the door on a piece of paper. Check all around the door. If the paper slides easily
anywhere, it is time to replace the gasket.
Use a good quality gasket that you can purchase from your dealer. The correct size and
density of the gasket are important to ensure a good seal.
Prior of removing the defective glass, you need to remove the door gasket. Inspect the
door gasket before it is reinstalled to make sure it is in good condition. We suggest
replacing the door and glass gasket at the same time as their level of wear over time is
similar.
For the following steps, wearing gloves and safety glasses are recommended for handling
seals can irritate the skin and the glass can be sharp.
To replace the door gasket, use the steps 1 to 3 and 10 outlined below;
To replace the glass, use the steps 1 to 6 and 9 to 10 outlined below;
To replace the glass gasket, use the steps 1 to 10 outlined below;
1. Remove the door (F) and place it on a stable work surface, handle down.
2. Using pliers, remove the door gasket (A).
3. Using a scraper or a small flat screwdriver, remove the adhesive left in the gasket
grove in the door then clean the surface using a commercial vacuum.
4. Use a Phillips screwdriver or a power drill to remove the screws (B) that holds the glass
retainer (C).
5. Remove the glass frame (D)
6. Remove the glass (E) (or pieces of glass if it is damaged) and clean the inside of the
door frame
.
7. Remove the old glass gasket.
8. Install the new gasket on the glass. Remove a part of the paper covering the gasket
adhesive. Center the gasket on the edge of the glass so that when folded and glued,
the gasket is equal on both sides. Do not stretch the gasket during installation. Remove
a majority of the paper, turn the glass to facilitate and complete the installation of the
gasket. When you return to the starting point, cut the gasket so that the ends overlap
by about ½ inch.
