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Lubrication
Lubrication of the bearings in the circulating air blower motor
and the combustion blower motor is not recommended.
Burner Flame
While the furnace is in operation, observe the burner flames.
Compare these observations to Figure M-3 to determine if
proper flame adjustment is present. If your observations
indicate improper flame adjustment, call your authorized
service dealer for service. Do not attempt to adjust flame!
Your service representative will perform this adjustment
correctly.
Rollout Switch
This unit is equipped with a manual reset high temperature
sensor or rollout switch. In the unlikely event of a sustained
burner flame rollout, the rollout switch will shut off the flow of
gas by closing the gas valve. The switch is located inside the
gas burner area. Flame rollout can be caused by blockage of
the power vent system, a blocked heat exchanger, or improper
gas pressure or adjustment. If this event occurs, the unit will
not operate properly. The gas supply to the unit should be
shut off and no attempt should be made to place it in
operation. The system should be inspected by a qualified
service technician.
Safety Interlock Switch
The blower compartment door on your high efficiency gas
furnace is equipped with a safety interlock switch that will
automatically shut off your complete system (including
blower) once the door is removed. This is for your personal
safety. Be sure to check your furnace for proper operation
once the door or panel has been replaced. If the system
does not operate once the panel has been replaced, try
removing and replacing it once again. If the furnace still
does not operate, call your dealer for service.
Typical Flame Appearance
Burner
Gas
Manifold
Figure M-3
Page 34 of 36
Heat
Exchanger
Burner
Flame
(Blue Only)
Issue 1207
REPAIR PARTS
The following repair parts are available from your local
distributor. When ordering parts, include the complete
furnace model number and serial number which are printed
on the rating plate located on the furnace.
Gas Control Group
Manifold
Manifold Retention Plate
Burner
Heat Exchanger Group
Primary Heat Exchanger
Flue Box
Burner Box
Blower Group
Blower Assembly
Blower Housing
Blower Motor
Blower Wheel
Inducer Group
Inducer Blower and Motor
Electrical Group
Control Box
Limit Switch
Fan Timer Control Board
Orifice
Ignition Wire
Gas Valve
Transfer Tube
Burner Inlet Plate
Capacitor
Blower Cutoff
Blower Support
Pressure switch
Ignition Control
Transformer
Rollout Switch
506307-01
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