Heat & Glo HST-42D Owner's Manual page 19

Overhead fan
operating?
Figure 5.1 Factory-built Fireplaces: Troubleshooting
Another appliance in
home also exhausting
air (furnace, fan,
Unsealed
dryer, etc.)?
can lights?
Air register from
furnace near
fireplace?
Doors opening
and closing?
Window closed
Combustion
for start-up?
air control
Heat & Glo • HST-42D Owner Manual • 4012-065 • Rev D • 11/13/13
Overhanging
tree?
Bird's nest
or leaves in
termination
cap?
Structural
changes in
chimney area?
Creosote buildup
in flue?
Outside air
closed?
19