Page 8507246-02 7/2018
Repair Parts Listing
When ordering repair parts, include the complete model number and serial number listed on the ETL/CSA rating plate -
e.g. LGH120H4BH1Y.
Gas Heat Section Parts
Heat Exchanger
Combustion Air Assembly
Combustion Air Proving Switch
Burner Assembly
Burner Manifold Assembly
Main Burner Orices
Flame Roll-out Switches
Auxiliary Limit Controls
Ignition Electrode Assembly
Ignition Lead
Ignition Sensor Assembly
Sensor Lead
Combination Gas Valve
Limit Controls
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.)
Electrical Control Parts
Unit Controller
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.)
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 - On 092-152 units, remove the tube bracket support
from the mullion on the right side of the heat section.
On 156-360 units, 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 ue box.
5 - Remove and retain two screws from the bracket
supporting the vent connector before removing vent
connector. 024-152 units do not have a support
bracket. 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 ue box cover.
7 - Return the combustion air inducer motor and the
vent connector to their original location. Secure
with retained screws. It is recommended that the
combustion air inducer gasket be replaced during
reassembly.
8 - On 092-152 units, replace the tube bracket support.
On 156-360 units, replace mullion.
9 - Use a small brush to clean the combustion air inlet
louvers on the heat access panel.
Flue Passageway and Flue Box
1 - Remove the combustion air inducer assembly as
described in the Combustion Air Inducer subsection.
2 - Remove the ue box cover. Clean the ue box with
a wire brush as required.
3 - Clean the tubes with a wire brush.
4 - Reassemble the unit. The ue box cover gasket
and combustion air inducer gasket should also be
replaced during reassembly.
Service Reminder
Call a qualied 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 lters should not be plugged, limiting air ow.
6 - Make sure all access panels are in place.
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