28 7036-187M August 13, 2018
MT. VERNON AE INSERT
Figure 28.1 - Example of a dirty heat exchanger
Figure 28.2
a. It is necessary to remove the bafe to gain access
to the heat exchanger. Follow instructions for
BAFFLE REMOVAL on page 31.
b. Vacuum the ash from the heat exchanger with an
upholstery brush to remove the majority of the ash.
Be sure to vacuum the back of the bafe also.
Inspect the drop tube and remove any residue
build-up in the drop tube (Figure 28.2).
2 exhaust exits (left and right side) must
be thoroughly cleaned. Each exit is
approximately 4 inches wide, 1 inch
across and 3 inches deep.
Figure 28.4
Figure 28.3
NOTE: It is normal to see a certain amount of wear of
the heat exchanger ns. You may notice some
aking and pitting on some of the pins. The heat
exchanger system will function as designed with
as many as 15 of these pins missing.
c. Assemble the crevice tool from the micro cleaning
kit to attach to a Shop Vac (Figure 28.3).
d. Use the crevice tool to nish cleaning the heat
exchanger ns. It is critical that the 2 exhaust
exits at the back of the rebox oor (left and right)
be thoroughly cleaned (Figure 28.4). There are
several ways this can done.
- Use the crevice tool.
- Attach a hose 1/2 inch (12.7mm) in diameter and
approximately 2 feet (607mm in length to your
vacuum hose.
- Use a bottle brush and push the ash down to the
bottom. Remove the combustion (exhaust) blower
and then vacuum out the ash.
Loosen all 6 nuts, but do NOT Remove
Figure 28.5
Figure 28.6
Vacuum out the exhaust area.
Figure 28.7
e. Removing the Combustion (Exhaust) Blower
- The combustion blower is mounted in the bottom
right rear of the appliance (Figure 28.5).
- Remove side panel and then using an 11/32 nut
driver to loosen all six nuts, but do not remove.
Rotate the blower and remove from the housing
(Figure 28.6).
- Set the blower on the top of the housing. You do
not need to disconnect the wires.
- Vacuum out the exhaust area (Figure 28.7).
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