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If you perform maintenance on the furnace yourself, remember that certain mechanical and electrical knowledge, skills
and tools are required to perform maintenance on the furnace. Personal injury or death my result. If you are not
properly trained. You should call your installing dealer or place of purchase if you are uncertain about your ability to
perform maintenance.
To avoid death or personal injury due to electrical shock, disconnect the electrical power before performing any
maintenance.
Annual Inspection
The furnace should be inspected by a qualified installer,
or service agency at least once per year. This check
should be performed at the beginning of the heating
season. This will insure that all furnace components are
in proper working order and that the heating system
functions appropriately. Particular attention should be
paid to the following items. Repair as necessary.
• Flue pipe system. Check for blockage and/or leak-
age. Check the outside termination and the con-
nections at and internal to the furnace.
• Combustion air intake pipe system (where appli-
cable). Check for blockage and/or leakage. Check
the outside termination and the connection at the
furnace.
• Heat exchanger. Check for corrosion and/or
buildup within the heat exchanger passageways.
• Burners. Check for proper ignition, burner flame,
and flame sense. Flames should extend directly
outward from burners without curling, floating or lift-
ing off.
• Drainage system. Check for blockage and/or leak-
age. Check hose connections at furnace.
• Wiring. Check electrical connections for tightness
and/or corrosion. Check wires for damage.
• Filters. Check that filters are clean and in the
proper placement in the furnace or duct system.
Check the burner flames for:
1. Good adjustment
2. Stable, soft and blue
3. Not curling, floating, or lifting off.
Burner Flame
Routine Maintenance
WARNING
Filters
To avoid death, personal injury or property damage,
disconnect electrical power before removing filters.
Never operate furnace without a filter installed. Dust
and lint will build up on internal parts resulting in loss
of efficiency, equipment damage and possible fire.
A return air filter is not supplied with this furnace; how-
ever, a means of filtering all of the return air must be
provided. Your installer will supply filters at the time of
installation. Become familiar with filter location and
procedures for removing, cleaning and replacing them.
If you need assistance, contact the installer of your
furnace or another qualified servicer.
Filters must be inspected, cleaned or changed every two
months or as required. As a homeowner, it is your
personal responsibility to keep air filters clean. Remem-
ber that dirty filters are the most common cause of
inadequate heating or cooling performance.
Filter Removal
Filters are located either at the unit or in a central return
grille. Horizontal installations use a ductwork or central
return grille location. If a filter is located at the unit, use
the following information to aid in filter removal.
To remove filters from an external filter rack in an upright
upflow installation, follow the directions provided with
external filter rack kit.
Upflow Filters (Upright)
To remove a filter from the bottom of the blower com-
partment in an upright upflow installation:
1. Turn OFF electrical power to furnace.
2. Remove the blower compartment door.
3. Push back and up on the wire filter retainer to release
4. Slide filter forward and out.
5. Replace the filter by reversing the procedure for re-
12
WARNING
it from under the front lip of the furnace basepan.
moval.
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