Problem: Draft blower runs constantly.
• Defective wall thermostat.
• This can be checked by turning the thermostat to a lower setting
than the temperature in your home. If the draft blower continues to
run, the thermostat may be defective. Replace if necessary.
Possible Causes:
Remedies:
• Defective relay in transformer.
• Replace transformer and relay.
• Have a professional determine the proper size furnace and
insulation factor of your home.
• Home is not being supplied with
a sufficient amount of heat to
satisfy the wall thermostat.
7.
Problem: Rapid accumulation of creosote in furnace and flue.
•
Use of high resin wood, such
as pine.
Possible Causes:
Remedies:
• Under-firing the furnace has
caused low flue gas temperature.
• Insufficient chimney draft.
8.
• Improper connection in stove
pipe causing air leakage or a
structural defect in the chimney
itself.
• Fire box not receiving adequate
amount of oxygen.
•
Completely avoid using if at all possible. If hardwoods are not
available, fuel the furnace with smaller loads. This will cause the
thermostat to call for more heat more often, which will initiate the
running of the draft blower. Consequently, the fires will be hotter,
thereby reducing the accumulation of creosote.
•
Install flue gas thermometer and maintain stack temperatures
between 300° and 400° F.
•
See #9.
•
DANGER: Never use uninsulated stove pipe as chimney. It must not
be used on the inside of your home due to high stack temperatures,
which create an extreme fire hazard. Uninsulated pipe cannot be
used as an outside flue because it causes rapid cooling of the stack
gases, which causes them to condense as creosote on the inside of
the flue.
•
Inspect entire flue run, from the exhaust stack of the furnace to the
termination cap. Repair as necessary.
• Furnace room may be too airtight to supply sufficient amount of
oxygen for combustion. Install an aperture to the outside consisting
of a minimum of 12 square inches or 4 inches round.
• Install stainless steel liner in masonry chimney to reduce creosote
formation and improve draw. Use appropriate size stainless liner for
the furnace.
• Use of an unlined masonry
chimney with a large clay tile
opening.
• Using uninsulated stove pipe
for the chimney, especially if the
construction is on the exterior of
the home.
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