Service Reminder; Repair Parts Listing - Lennox KG 024 User's Information Manual

Combustion Air Inducer
A combustion air inducer proving switch checks combus-
tion air inducer operation before allowing power to the gas
controller. The gas controller will not operate if the inducer
is obstructed.
Under normal operating conditions, the combustion
air inducer wheel should be checked and cleaned prior
to the heating season. However, it should be examined
periodically during the heating season to establish an
ideal cleaning schedule.
Clean the combustion air inducer as follows:
1 - Turn off the electrical power and the gas supply to
the unit.
2 - Remove the mullion on the right side of the heat
section.
3 - Disconnect the pressure switch air tubing from the
combustion air inducer port.
4 - Remove and retain the screws securing the
combustion air inducer to the flue box.
5 - 180-300S Units Only - Remove and retain two
screws from the bracket supporting the vent
connector before removing vent connector. See
Figure 7.
6 - Clean the inducer wheel blades with a small brush
and wipe off any dust from the housing. Clean
accumulated dust from the front of the flue box
cover.
7 - Return the combustion air inducer motor and the

Repair Parts Listing

When ordering repair parts, include the complete model number and serial number listed on the ETL/CSA rating plate -
e.g. KGC120S4BH1Y.
Gas Heat Section Parts
Heat Exchanger
Combustion Air Assembly
Combustion Air Proving Switch
Burner Assembly
Burner Manifold Assembly
Main Burner Orifices
Flame Roll-out Switches
Auxiliary Limit Controls
Ignition Electrode Assembly
Ignition Lead
Ignition Sensor Assembly
Sensor Lead
Combination Gas Valve
Limit Controls
507350-06 8/2022
8 - Replace mullion.
9 - Use a small brush to clean the combustion air inlet
Flue Passageway and Flue Box
1 - Remove the combustion air inducer assembly as
2 - Remove the flue box cover. Clean the flue box with
3 - Clean the tubes with a wire brush.
4 - Reassemble the unit. The flue box cover gasket

Service Reminder

Call a qualified service technician if the unit is inopera-
tive. Before calling, always check the following to be sure
service is required:
1 - Be sure electrical disconnect switches are ON.
2 - Check room thermostat for proper setting.
3 - Replace any blown fuses or reset circuit breakers.
4 - Gas valve should be ON.
5 - Air filters should not be plugged, limiting air flow.
6 - Make sure all access panels are in place.
Cooling Parts
Compressors
Condenser Fan Motors
Condenser Fan Blades
Condenser Fan Run Capacitors
Freezestats
Condenser Fan Mounting Bracket
Fan Grille
Indoor Blower Motors
Blower Wheel
Expansion Valve
Distributor
Exhaust Fans (Opt.)
Reversing Valve (Reheat units only)
Page 8
vent connector to their original location. Secure
with retained screws. It is recommended that the
combustion air inducer gasket be replaced during
reassembly.
louvers on the heat access panel.
described in the Combustion Air Inducer subsection.
a wire brush as required.
and combustion air inducer gasket should also be
replaced during reassembly.
Electrical Control Parts
Compressor Contactors
Circuit Breakers (Opt.)
Transformer (Control)
Transformer (Contactor)
Blower Contactor
Limit, Blower Relay
Heat Relays
Condenser Fan Relays
Capacitor CAB
Relay CAB
Disconnect Switch (Opt.)