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TROUBLESHOOTING Qualified Technicians Only
Unplug Appliance Before Performing Any Troubleshooting or Maintenance
PAGE 39
PROBLEM CAUSE(S) SOLUTIONS
1. Fire burns with a
lazy orange flame.
Pellets build up in
the grate and there
is excessive glass
soot that is difficult to
remove (Ash and
soot are a product of
combustion with any
wood products, so
some build-up on the
glass is normal).
There is insufficient combustion air.
Lack of maintenance (clean Ultragrate, clean-out ports, exhaust
flow passages, venting system, exhaust blower intake, etc.
Remove any clinkers or ash from the bottom of the Ultragrate
that might be obstructing the primary air holes.
Check that the heat exchange tubes are not coated with ash.
Clean internal exhaust ducts.
Check gasket seal around the door. Use a thin strip of paper, 1
in. wide. Open the door and close it on the paper strip. A slight
friction should be felt when the paper strip is pulled. Repeat this
process at various locations around the door gasket. Replace
the door gasket if necessary.
Check gasket around ashpan.
Check for blockage in the air inlet tube or exhaust pipe. Clean
as Necessary.
Inspect glass seal to ensure that it is in good condition and is
properly seated to the door.
Fuel trim may need to be adjusted down for faster feeding fuels.
Change to a better grade of fuel if necessary.
Check that the damper has been opened enough for the amount of
fuel fed.
Have Your Authorized Lennox Hearth Products dealer check your
exhaust blower for proper operation.
The venting system design is too restrictive (call your authorized
Lennox Hearth Products Technician to evaluate how the installation
can be corrected to satisfy the exhaust flow requirements of the
appliance).
2. Fire goes out or
stove shuts down
automatically
Stove has run out of fuel.
Pellets are not feeding.
The high limit disc (thermal switch) has
tripped.
There is too much combustion air for
the amount of fuel.
Refill hopper.
See (Pellets will not feed) this page.
Allow stove to cool for 1 hour and re-light. If the stove has been
operating at a medium to high burn rate and the room air blower has
been turned down low then the fan should be turned up higher. If
this problem persists (particularly at lower burn rates) then the high
limit disc should be replaced by your authorized dealer.
Adjust the damper to reduce combustion air flow.
3. Pellets will not
feed.
The hopper is empty.
The auger motor or control board may
be defective. The pressure switch tap
or hose may be blocked.
Back pressure in venting tripping pres-
sure switch.
Thermostat is in stand-by mode.
Thermostat wires disconnect.
High limit disc (thermal switch) may
have been tripped.
Self-aligning bearings in auger motor
may be mis-aligned.
Refill hopper.
Check to be sure that there is no blockage in the pressure tap or
hose. Have your authorized Lennox Hearth Products dealer diag-
nose the problem and clean or replace any necessary parts.
If new installation check for excessive 90˚ bends, long horizontal
runs or excessive vertical run of 3” pipe. Possibly change to 4” pipe.
If older installation check for excessive ash accumulation in pipe or
other obstructions. Clean out pipe.
Check to see if thermostat is set to low or if sun is shining directly
on thermostat.
Re-install wires.
Allow stove to cool. Increase room air blower setting.
Gently
tap the auger motor.