![Repair Parts List](/images/new-backgrounds/54125/54125107x1.webp)
Applications Using A
NOTE - In these applications,
1 - On a call for heat, thermostat
2 - Once the control receives a signal that the low pres sure switch has closed, the combustion air inducer be gins a
NOTE - If the low fire pressure switch does not close the combustion air inducer will switch to high fire. After a 15 second
3 - After the
4 - After the
5 - If the heating demand continues beyond the second- stage on delay, the integrated control energizes the combustion air inducer at high speed. The control also checks the high fire (second stage) pressure switch to make sure it is closed. The high fire (second stage) gas valve is energized and the indoor blower motor is energized for operation at the high fire heating speed.
6 - When the thermostat heating demand is satisfied, the combustion air inducer begins a
7 - When the combustion air
Repair Parts List
The following repair parts are available through Lennox dealers. When ordering parts, include the complete fur nace model number listed on the CSA nameplate
Cabinet Parts
Outer access panel
Blower access panel
Top Cap
Control Panel Parts
Transformer
Integrated control board
Door interlock switch
Blower Parts
Blower wheel
Motor
Motor mounting frame
Motor capacitor
Blower housing cutoff plate
Heating Parts
Flame Sensor
Heat exchanger assembly
Gas manifold
Combustion air inducer
Gas valve
Main burner cluster
Main burner orifices
Pressure switch
Ignitor
Primary limit control
Flame rollout switches
Page 54