FILTERING OUT
TROUBLE
A dirty air filter will cause a loss of airflow in your duct system. When excessive loss of airflow occurs, the furnace may cycle on its safety controls. If this condition is left unattended, the furnace will eventu- ally lock out. It is recommended that the furnace air filter be checked every 3 or 4 weeks and cleaned if necessary.
!CAUTION
Never operate your furnace without the air filter in place. Doing so may damage the fur- nace blower motor. An accu- mulation of dust and lint on internal parts of your furnace can cause a loss of efficiency.
The air filter is normally located in the blower compartment. (See Fig. 2.)
If air filter has been installed in another location, contact your dealer for instruc- tions. To inspect, clean, and/or replace the air filter(s), follow these steps:
1.Turn off electrical supply to the furnace. (See Fig. 18.)
2.Remove main furnace door. (See Fig. 21.)
3.Remove blower access panel. (See Fig. 22.)
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NOTE: It will be necessary to remove
2screws.
4.Remove air filter from furnace.
• AIR FILTER(S) LOCATED IN BOTTOM:
a.Slide filter retainer sideways until it is free of latch. (See Fig. 23.)
b.Slide air filter out of furnace. (See Fig. 24.)
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•AIR FILTER LOCATED IN SIDE:
a.Remove filter retainer from latch. (See Fig. 25.)
b.Gently remove air filter and care- fully turn the dirty side up (if dirty) to avoid spilling dirt from the filter. (See Fig. 26.)
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5. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was shipped with the furnace has been replaced with an electronic air cleaner (EAC), refer to the EAC Owner’s Man- ual for maintenance information.
6.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 filter to dry.
7.Reinstall clean air filter.
8.Reinstall filter retainer.
9.Replace blower access panel and main furnace door. Be sure to replace 2 screws in blower access panel. (See Fig. 27 and 28.) Turn on electrical supply to the furnace.
If your furnace air filter needs to be replaced, be sure to use the same size and type of filter that was originally supplied. Use the furnace filter table and compare your furnace size with the proper filter size.
FURNACE AIR FILTER TABLE
FURNACE |
|
|
CASING WIDTH | FILTER SIZE* |
|
(IN.) | (IN.) | FILTER TYPE |
|
|
|
(1) 16 x 25 x 1 | Cleanable | |
|
|
|
21 | (1) 20 x 25 x 1 | Cleanable |
|
|
|
(1) 24 x 25 x 1 | Cleanable | |
|
|
|
*Furnace with a side
!CAUTION
Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends. Wear safety glasses, gloves, and appropri- ate protective clothing. Failure to follow this caution could re- sult in personal injury.
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