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Planned Service
The following items should be checked during an annual inspection. Power to the unit must be shut off for the service
technician's safety.
Fresh air grilles and louvers (on the unit and in the
room where the furnace is installed) - Must be open and
unobstructed to provide combustion air.
Burners - Must be inspected for rust, dirt, or signs of water.
Vent pipe - Must be inspected for signs of water, damaged
or sagging pipe, or disconnected joints.
Unit appearance - Must be inspected for rust, dirt, signs of
water, burnt or damaged wires, or components.
Blower access panel - Must be properly in place and
provide a seal between the return air and the room where
the furnace is installed.
Return air duct - Must be properly attached and provide
an air seal to the unit.
Repair Parts List
The following repair parts are available from the 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. All service must be performed by a
licensed professional installer (or equivalent), service agency, or gas supplier.
Cabinet Parts
•
Heating compartment access panel
•
Blower access panel
•
Top cap
Control Panel Parts
•
Transformer
•
Two-stage, variable speed integrated control
•
Door interlock switch
Blower Parts
•
Blower wheel
•
Blower housing
•
Motor
•
Motor electronics
•
Power Choke (1 hp only)
•
Motor mounting frame
•
Blower housing cutoff plate
507335-03
Operating performance - Unit must be observed during
operation to monitor proper performance of the unit and
the vent system.
Combustion gases - Flue products must be analyzed and
compared to the unit specifications.
Problems detected during the inspection may make it
necessary to temporarily shut down the furnace until the
items can be repaired or replaced.
Instruct the homeowners to pay attention to their
furnace. Situations can arise between annual furnace
inspections that may result in unsafe operation. For
instance, items innocently stored next to the furnace may
obstruct the combustion air supply. This could cause
incomplete combustion and the production of carbon
monoxide gas.
Heat Parts
•
Flame sensor
•
Heat exchanger assembly
•
Gas Manifold
•
Two speed combustion air inducer
•
Two stage gas valve
•
Main burner cluster
•
Main burner orifices
•
Pressure switch
•
Ignitor
•
Primary limit control
•
Flame rollout switch
•
Secondary limit
Issue 2302
Page 37 of 39
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