—7—
7. Wash the 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 the filter in the opposite direction of airflow through the cross-mesh binding side. Allow filter to dry.
8. Reinstall the clean filter with the cross-mesh binding side facing the furnace blower.
9. Replace blower door, reinstall 4 screws (see Fig. 18), and turn on electrical power to your furnace.
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17
18
COMBUSTION AREA AND VENT SYSTEM
Visually inspect the combustion area and vent system before each heating season. Make sure that the pipe leading into the vent is free from
any cracks and sags. Also check the vent pipe on the outside of your home for blockage.
When dirt, soot, or rust is allowed to build up, your furnace can suffer a loss of efficiency and perform improperly. Accumulations on the main
burners can result in their firing out of normal sequence. This delayed ignition will create an alarmingly loud sound.
To inspect the combustion area and vent system, you will need a flashlight. Refer to Fig. 1, and proceed as follows:
1. Turn off the electrical supply to your furnace. (See Fig. 14.)
2. Remove burner enclosure front.
Inspect the gas burners for dirt, rust, or scale. (See Fig. 19.) Then inspect the vent outlet area and vent pipe.
3. Inspect the vent pipe for sags, holes, cracks, or disconnections. Any horizontal vent pipe must slope upward, away from the furnace. If
rusty joints or seams, or signs of water leakage are found, call your dealer for service.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above conditions, restore electrical power to your furnace. (See Fig. 10.)
6. Start your furnace and observe its operation. Watch the burner flames to see if they are clear blue, almost transparent. (See Fig. 20.) If you
observe a suspected malfunction, or that the burner flames are not clear blue, call your dealer.
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20
CAUTION: If your furnace makes an especially loud noise when the main burners light, shut down your furnace
and call your dealer.
CAUTION: If dirt, rust, soot, or scale accumulations are found, call your dealer.
Do not operate your furnace.
DANGER: If holes are found in the vent pipe, or if it has become disconnected, toxic fumes can escape into your
home. DO NOT OPERATE YOUR FURNACE. Call your dealer for service.
ON
OFF
ON
OFF
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