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Fig. 2: Common Chimney Problems
Table 2: Common Chimney Problems
Refer to Figure 2
Key Trouble Diagnostic Remedy
A
Top of chimney
lower than sur-
rounding ob-
jects
Observation
Extend chimney
above all sur-
rounding ob-
jects within 30
feet.
B
Chimney Cap
or ventilator.
Observation Remove
C
Coping restricts
opening.
Observation
Make opening
as large as
inside of chim-
ney.
D
Obstruction in
chimney
Can be found
by light and
mirror reflecting
conditions in
chimney.
Use weight to
break and dis-
lodge.
E
Joist protruding
into chimney.
Lowering a light
on an extension
cord.
Must be han-
dled by compe-
tent masonry
contractor.
F
Break in chim-
ney lining.
Smoke test -
build smudge
fire blocking off
other opening,
watching for
smoke to es-
cape.
Must be han-
dled by compe-
tent masonry
contractor.
G
Collection of
soot at narrow
space in flue
opening.
Lower light on
extension cord.
Clean out with
weighted brush
or bag of loose
gravel on end
of line.
H Offset
Lower light on
extension cord.
Change to
straight or to
long offset.
I
Two or more
openings to the
same chimney.
Found by in-
spection from
basement.
The least im-
portant opening
must be closed,
using some
other chimney
flue.
J
Loose-seated
pipe in flue
opening.
Smoke test.
Leaks should
be eliminated
by cementing
all pipe open-
ings.
K
Smoke pipe
extends into
chimney.
Measurement
of pipe from
within or obser-
vation of pipe
by means of a
lowered light.
Length of pipe
must be re-
duced to allow
end of pipe to
be flush with
inside of tile.
L
Failure to ex-
tend the length
of flue partition
to the floor.
By inspection or
smoke test.
Extend partition
to floor level.
M
Loose-fitted
clean-out door.
Smoke test.
Close all leaks
with cement.
DRAFT REGULATOR CONTROL
This device is used in conjunction with conventional chimney
venting. This control (or draft regulator) automatically maintains
a constant negative pressure in the furnace to obtain maximum
efficiency. It ensures that proper pressures are not exceeded. If
the chimney does not develop sufficient draft, the draft control
cannot function properly. The draft regulator, must be installed
within the same room or enclosure as the furnace, and should
not interfere with the combustion air supplied to the burner. The
control should be located a minimum of 3 flue pipe diameters
from the furnace breeching and installed in accordance to the
instructions supplied with the regulator.