Filter
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31 32
b) Electronic air cleaner (EAC) – Refer to EAC Owner’s
Manual for maintenance information.
5. If washable filter, wash filter (if dirty) in sink, bathtub, or out-
side with a garden hose. Always use cold tap water. A mild
liquid detergent may be used if necessary. Spray water
through filter in the opposite direction of airflow. Allow filter
to dry.
6. Reinstall clean air filter
7. Reinstall filter retainer (for blower compartment locations
only)
8. Replace blower access panel and main furnace door (See
Fig. 35 and 36.) or filter cabinet door (Fig. 37 and 38.)
9. Turn on electrical supply to furnace.
If your furnace air filter needs to be replaced, be sure to use a
factory-authorized filter of the same size that was orginally sup-
plied. Use the filter tables and compare your furnace size with the
proper filter size.
33 34
35 36
37 38
* Factory-provided with the furnace. Filters may be field modified by cutting-
filter material and support rods (3) in filters.
†
Upflow only. Alternate sizes and additional filters may be ordered from your
dealer.
COMBUSTION AREA AND VENT SYSTEM
Visually inspect the combustion area and vent system before
each heating season. Make sure that all PVC pipes leading into
the combustion area and vent are free from any cracks and sags.
A05100
FURNACE AIR FILTER TABLE
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE
CASING
WIDTH (IN.)
FILTER SIZE (IN)
FILTER
TYPESide Return†* Bottom Return*
17-1/2 (1) 16 x 25 x 1 (1) 16 x 25 x 1 Cleanable
21 (1) 16 x 25 x 1 (1) 20 x 25 x 1 Cleanable
24-1/2 (1 or 2) 16 x 25 x 1 (1) 24 x 25 x 1 Cleanable
AIR FILTER LOCATED IN FILTER CABINET
FILTER
CABINET
HEIGHT (IN)
FILTER
SIZE (IN)
FILTER
TYPE
16 (1) 16 x 25 x 1*
or (1) 16 x 25 x 4-5/16
Cleanable or
Disposable
20 (1) 20 x 25 x 1*
or (1) 20 x 25 x 4-5/16
Cleanable or
Disposable
24 (1) 24 x 25 x 1*
or (1) 24 x 25 x 4-5/16
Cleanable or
Disposable
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in per-
sonal injury.
Use care when cutting support rods in filters to protect
against flying pieces and sharp rod ends. Wear safety
glasses, gloves, and appropriate protective clothing.
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in per-
sonal injury or death.
If holes are found in the pipes or if any portion has
become disconnected, toxic fumes can escape into
your home. DO NOT OPERATE YOUR FURNACE.
Call your dealer for service.
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