Lennox Hearth II-T C FS 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 a	There is insufficient combustion air.	Remove any clinkers or ash from the bottom of the UltraGrateTM that
lazy orange flame.		might be obstructing the primary air holes.
Pellets build up in		Change to a better grade of fuel if necessary.
the UltraGrateTM and
the window gets		Check that the damper has been opened enough for the amount of
sooted up.		fuel feed.
		Check that the heat exchange tubes are not coated with ash.
		Check ash build up behind the side firebricks. Clean if necessary.
		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, exhaust pipe and termina-
		tion. Clean as necessary.
		Have your authorized Lennox Hearth Products dealer check your
		combustion blower.
	Fuel feed rate is too high.	Have your authorized Lennox Hearth Products dealer adjust the fuel
		feed rate on the control board.
2. Fire goes out or	Stove has run out of fuel.	Refill hopper.
stove shuts down	Pellets are not feeding.	See Pellets will not feed on following page.
automatically
	The high limit temperature switch has	Allow stove to cool for 1 hour and re-light. If the stove has been
	tripped.	operating at a medium to high burn rate and the Room Air Blower
		has been turned down low then the Exhaust Blower 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.
	There is too much combustion air for	Adjust the damper to reduce combustion air flow.
	the amount of fuel.	Check that the ash pan is latched in the correct position and check
		the gasket seal around the ash pan door in the same manner as
		above. Replace the ash pan door gasket if necessary.
	The fuel feed rate is too low.	Relight stove with a higher setting on fuel control (it may not be
		possible to operate the stove on the minimum setting due to the
		wide range of fuel feed rates with different pellets. The fuel feed rate
		trim can be adjusted to compensate for variations in fuel (call your
		authorized Lennox Hearth Products dealer adjust the fuel control).
	Low Limit disc is not locked in.	Insufficient heat is reaching the low limit disc (improper damper
		adjustment or lack of maintenance may cause) or disc is defective.
3. Stove runs for 30	The exhaust gas is not up to tempera-	Press start button and re-light stove if necessary.
minutes then shuts	ture.
down.	The low limit disc is not operating cor-	Have your authorized Lennox Hearth Products dealer replace the
Or	rectly (stuck in open position)	low limit disc.
Stove shuts down	The wires to the low limit disc (on ex-	Check wires and connections. Make sure there are good connec-
when operated at	haust blower housing) are loose or	tions between all wires and their terminals.
lower feed rate set-	disconnected.
tings.

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