Hearthstone Quality Home Heating Products, Inc
®
Craftsbury (Model 8392)
35
C
ATALYST
T
ROUBLESHOOTING
G
UIDE
PROBLEM
POSSIBLE CAUSE
SOLUTIONS
FLY ASH BUILD
UP ON
CATALYSTS
Catalysts have not
maintained light-off
temperature
Brush cold combustor with soft-bristled brush or vacuum lightly.
Follow instructions in the manual for a proper catalyst light-off
Burning materials that
cause a lot of char and
fly-ash
Don’t burn cardboard, gift wrap paper, or garbage. Burn only
dry, seasoned wood, per the owner’s manual.
Bypass closed too soon
Follow instructions in the manual for a proper catalyst light-off
CATALYSTS
PLUGGING OR
MASKING
(SOOT/CRESO-
TE)
Burning wet, pitchy
woods, or burning large
loads of small diameter
wood with the combustor
in the operating position
without catalyst light off
occurring
Burn dry seasoned wood. Follow instructions in the manual for a
proper catalyst light-off, and ensure catalyst light-off as occurred
before closing bypass damper. It may be possible to burn the
soot or creosote off by building a hot fire, and allowing the stove
to run until the catalysts are well within the operating range
before closing the bypass. Continue to run the stove at a high
temperature for one hour, while ensuring the catalysts stay in
the upper operating range, but not too hot.
WARPING OR
BOWING OF
THE
CATALYSTS
Excessive catalyst
temperatures for long
periods of time.
Ensure that the catalysts remain in the operating zone, and
does not get to hot. Reduce air control settings for a lower burn
rate to ensure catalyst temperatures do not exceed the
operating range.