15
PROBABLE CAUSE
• Chimney not high enough
• Too many elbows.
• Insufficient flue size.
• Flue has a cold spot which inhib-
its exhaust discharge from rising
properly. This symptom may occur
in factory built flues because the in-
sulation has settled or a seam has
ruptured. In masonry flues, mortar
loss may be causing the aspiration
of cooler outside air into the stack.
• There is an obstruction outside
the chimney, such as a tree.
• Flue is located to close to the peak
of the roof or does not rise above it
to provide the proper draft.
• Flue is located to close to another
building.
• Obstruction in chimney.
• Excessive ash accumulation.
• Cresosote build-up.
SUGGESTED REMEDY
Chimney should be a minimum of
12’ from ground.
The run should not contain more
than two (2) elbows.
Replace with a larger flue providing
a minimum of fifty square inches of
draft area but not more than 100
square inches of draft area. If flue is
within these specifications, check the
draft with a gauge. Your flue should
provide a minimum of .08 water col-
umn inches.
Check entire flue for structural integ-
rity and leakage. Correct or repair as
needed.
Remove obstruction.
Relocate flue termination or in-
crease height as required.
Relocate flue termination.
Check entire chimney system
including stove pipe run. Utilize
chimney cleaning device to remove
any foreign matter.
Remove if necessary.
Clean chimney..
PROBLEM
6. Smoke from the fire chamber
is puffing back through spin draft
knobs
7. Down draft on chimney
caused by one or more of the
following
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
