9
FILTERING OUT TROUBLE
UNIT PERFORMANCE HAZARD
Failure to follow this caution may result in unit component
damage.
Never operate your furnace without a filter in place. Doing
so may damage the furnace blower motor.
An
accumulation of dust and lint on internal parts of your
furnace can cause a loss of efficiency.
CAUTION
!
A dirty filter will cause excessive stress on the furnace, heat
exchanger, and blower motor and can cause it to overheat and
automatically shut down. The furnace filter should be checked
every 4 weeks and cleaned or replaced if necessary.
If installed with factory--specified disposable media filter, check or
replace filter before each heating and cooling season. Replace
disposable media filter at least once a year.
If your furnace filter needs replacing, be sure to use the same size
and type of filter that was originally specified.
The air filter for the furnace may be located in the blower
compartment or in the factory--supplied filter cabinet attached to
the side or bottom of the furnace casing. If air filter has been
installed in another location, contact your dealer for instructions.
To inspect, clean and/or replace the air filter(s), follow these steps:
1. Turn off electrical supply to the furnace. See Fig. 20.
2. Remove air filter from furnace.
S
AIR FILTER(S) LOCATED IN BLOWER COMPARTMENT:
a. Remove main furnace door. See Fig. 21.
b. Remove blower access panel. See Fig. 22.
NOTE
: It will be necessary to remove two screws.
S
AIR FILTER(S) LOCATED IN BLOWER COMPARTMENT
BOTTOM:
c. Slide filter retainer sideways until it is free of latch (See
Fig. 25).
d. Slide air filter out of furnace. See Fig. 26.
S
AIR FILTER(S) LOCATED IN BLOWER COMPARTMENT
SIDE:
a. Remove filter retainer from latch. See Fig. 27.
b. Gently remove air filter and carefully turn the dirty side
up (if dirty) to avoid spilling dirt from the filter (See
Fig. 28).
S
AIR FILTER(S) LOCATED IN FILTER CABINET:
a. Remove filter cabinet door. (See Fig. 23 and 24.)
NOTE
: It will be necessary to remove one thumbscrew.
b. Slide air filter out of furnace. Keep dirty side up (if
dirty) to avoid spilling dirt. See Fig. 29 and 30.
3. Inspect the filter. If torn replace it.
NOTE
: If a washable filter was shipped with the furnace and has
been replaced by:
S
Factory specified disposable media filter----Do not clean.
If dirty, replace only with media filter having the same
part number and size. Install with airflow direction ar-
row pointing towards blower.
S
Electronic Air Cleaner (EAC), refer to the EAC Owner’s
Manual for maintenance information.
4. If washable filter, wash filter (if dirty) in a sink, bathtub, or
outside 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 fil-
ter to dry.
5. Reinstall clean air filter.
6. Reinstall filter retainer (for blower compartment locations
only.)
7. Replace blower access panel and main furnace door (See
Fig. 33 and 34) or filter cabinet door (Fig. 29 and 30).
8. Turn on electrical supply to the furnace.
If your furnace air filter needs to be replaced, be sure to use a
factory--authorized filter of the same size that was originally
specified. Use the filter tables and compare your furnace size with
the proper filter size.
A92185
Fig. 20 -- Turn Off Electrical Supply
A05087
Fig. 21 -- Main Furnace Door
A93204
Fig. 22 -- Blower Access Panel
