TROUBLESHOOTING
Qualified
Technicians Only
Unplug Appliance Before Performing Any Troubleshooting or Maintenance
PAGE 36
PROBLEM CAUSE(S)
SOLUTIONS
4. Pellets will not
feed.
The hopper is empty.
The auger motor or circuit board, air
inlet high limit switch or pressure
switch 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 switch may have been
tripped.
Self-aligning bearings in auger motor
may be misaligned.
Auger is Jammed
Auger Motor Setscrew is loose.
Pressure switch is sensing back pres-
sure in the vent system and shutting
off the auger motor.
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 too low or if sun is shining directly
on thermostat.
Re-install wires.
Allow stove to cool. Increase convection blower setting.
Gently tap the auger motor.
Unplug stove. Remove the rear inspection panel (freestanding
model). Hold auger motor gearbox in both hands and rock it back
and forth to release the auger. If this is unsuccessful, then contact
your authorized Lennox Hearth Products dealer.
Tighten setscrew.
Remove left side panel (freestanding model) and locate the orange
rubber hose that attaches the pressure switch to the exhaust
blower. Disconnect the rubber hose from orifice on blower housing.
If the auger starts to feed, the pressure switch is sensing back pres-
sure. After test, reconnect hose to blower (NEVER operate the ap-
pliance with hose removed). Clean venting system and exhaust flow
passages as outlined in Routine Maintenance section of this man-
ual. Note: Multiple elbows are more susceptible to collecting ash
resulting in restriction
5. Blowers will not
shut off after the fuel
has been switched
off and the stove has
cooled down.
The low limit disc has failed in the
closed position.
Have your authorized Lennox Hearth Products dealer replace the
low limit disc.
6. Blowers will not
operate when the
start button is de-
pressed.
There is no power to the stove.
There is no power to the control board.
Check that the stove is plugged in to the wall outlet. Ensure that
there is power to the outlet (test by plugging in a lamp into same
outlet).
Check to see if your circuit breaker has tripped.
Check the wire connections on the high limit disc and control board.
7. One or both blow-
ers shut off for no
apparent reason.
Both the room air blower and the ex-
haust blower have an over-heat pro-
tector (high limit disc) built into them. If
the temperature of the blower motor
exceeds the high limit temperature,
then the motor shuts down.
Ensure the room air blower is adjusted to a setting at least as high
as or higher than the fuel fee setting. If the blower motor continues
to shut down, clean blower intake (see Routine Maintenance). If this
does not correct the problem, replace the blower.
8. Stove will not light. The igniter element may have failed.
There are not enough pellets in the
UltraGrate
TM
.
Improper damper setting.
Check igniter element fuse in rear stove compartment. Call your
authorized Lennox Hearth Products dealer. See alternate manual
lighting procedure
Prime the feed system (see
Starting Your Pellet Stove
on page 22).
Adjust damper (see page 23
Damper Operation
and page 24
Damper Adjustment Guidelines
).
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