Lennox Hearth T300P TROUBLESHOOTING Qualified Technicians Only, Problem, Causes, Solutions

TROUBLESHOOTING (Qualified Technicians Only)

Unplug Appliance Before Performing Any Troubleshooting or Maintenance

PROBLEM	CAUSE(S)	SOLUTIONS
1. Fire burns with	There is insufficient combustion air.	Remove any clinkers or ash from the bottom of the grate that
a lazy orange		might be obstructing the primary air holes.
flame. Pellets		Change to a better grade of fuel if necessary.
build up in the
grate and the		Check that the damper has been opened enough for the
window gets
sooted up.		amount of fuel feed.
		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 for blockage in the air inlet tube or exhaust pipe.
		Clean as necessary.
		Close ash slide plates.
		Have your authorized Lennox Hearth Products dealer check
		your Exhaust Blower.
2. Fire goes out	The hopper is empty	Refill hopper.
or stove shuts	Pellets are not feeding.	See Pellets will not feed (#3) below.
down automati-
cally	The high limit temperature switch	Allow stove to cool for 1 hour and re-light. If the stove has
	has tripped.	been operating at a medium to high burn rate and the room
	There is too much combustion air	air blower has been turned down low then the fan should be
		turned up higher. If this problem persists (particularly at
	for the amount of fuel.	lower burn rates) then the high limit disc should be replaced
		by your authorized Lennox Hearth Products dealer.
		Adjust the damper to reduce combustion airflow.
3. Pellets will not	Stove has run out of fuel.	Refill hopper.
feed.	The auger motor or circuit board	Check to be sure that there is no blockage in the pressure
	may be defective. The pressure	tap or hose. Have your authorized Lennox Hearth Products
	switch tap or hose may be blocked.	dealer diagnose the problem and clean or replace any nec-
		essary parts.
	Back pressure in venting tripping	If new installation check for excessive 90˚ bends, long hori-
	pressure switch.	zontal 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.
	Thermostat is in stand-by mode.	Check to see if thermostat is set to low or if sun is shining
		directly on thermostat.
	Thermostat wires disconnect.	Re-install wires.
	High limit switch may have been	Allow stove to cool. Increase room air blower setting.
	tripped.
	Self-aligning bearing in auger motor	Gently tap the auger motor.
	may be mis-aligned.

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