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18 USSC
TROUBLE SHOOTING
Unplug stove before performing any maintenance
PROBLEM CAUSE: Too rich air/fuel mixture
? Fire burns with a lazy, orange flame
and/or fuel builds up in the firepot.
Glass may become dirty.
? Fire goes out or stove shuts down.
Fuel may stop feeding.
? Fire goes out or stove shuts down.
Fuel may stop feeding.
Make sure glass door is shut and
sealed tightly. If not, adjust door
handle or replace gasket.
Check ash dumps are in place and
sitting flat to assure a proper seal.
Check that exhaust fan is running
and venting properly. If not, check
connection and clean or replace.
Moisture content above 15%.
Allow fuel to dry or mix with wood
pellets.
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Check inside stove and exhaust
pipes for blockage. Tap inside
walls of firebox, clean behind
lower access plates (located on
the back inside wall, next to the
firepot) clean firepot and firebox
vent holes above firebrick panel.
Feed rate is too HI for fuel, reduce
heat setting.
Inadequate combustion air
available, add outside
combustion air.
(Optional kit 67FAK)
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CAUSE: Firepot burns out of fuel
Hopper empty, refill
Auger jams. Remove auger and
clean. (Auger jams can be a prob-
lem if poor quality fuel is used. Or
excessive fines (sawdust, corn
cobs or husk) are found in hopper.
Auger jams are evident when the
auger turns but no fuel is delivered.
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The control board diagnostics will
illuminate the “A” for a Vacuum
Switch error and illuminate “B” for
a Hi Limit error.
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CAUSE: Auger stops turning
Auger has come loose. Check to
see if auger motor is turning and
auger is not. NOTE: Auger is held
to the auger motor by a coupler
that is fastened to the auger motor.
Simply slide the auger into the
auger housing and rotate until it
fits into the coupler.
Low limit sensor. If the operating
temperature is too low the stove
will shut down.
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Hi limit sensor. Evident when
stove is extremely hot and the
light above “B” is flashing. Allow
stove to cool for 1 hour and
restart.
Vacuum switch tripped. Caused
by exhaust blower not running
or venting blocked. Check
blower, clean or replace. Clean
venting of blockage.
Auger motor not operating.
Inspect connection and replace
if necessary.
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NOTE: Negative pressure in a home is a serious issue. All American Harvest appliances should
be installed with the optional fresh air kit (67FAK).