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See Fig. 13. 7. Turn the control knob on the internal gas valve to the PILOT position. 8. Place a lighted match or other suitable source of flame near the top of the pilot. See Fig. 14. Refer to the lighting instruction label affixed to the furnace blower access door. Depress the button or knob and hold it down. The pilot will light. Remove and extinguish the match while continuing to hold the button or knob down for at least 60 seconds. Then, release. The pilot will remain lit. NOTE: If the pilot does not remain lit, repeat steps 5 through 8; however, hold the button down for a longer period of time (at least 90 seconds). If the pilot flame is extinguished after this second attempt, the thermocouple should be checked for a possible malfunction. Call your dealer for service. A89170 9. After the pilot flame is established, turn the control knob on the gas valve to the ON position. 10. Replace the access door. Insert door end into the furnace, push the door in and down. See Fig. 15 or 16. On downflow furnaces, remove the blower access door, install the control access door, then reinstall the blower access door. 11. Turn on the electrical supply to the furnace. 12. Adjust the room thermostat to a setting slightly above room temperature. This will automatically signal the A86044 5 furnace to start. If your furnace is equipped with an optional vent damper, see Fig. 6 and VENT DAMPER paragraph above Fig. 6 for information about the vent damper. 13. Furnace main burners should light shortly after you set the thermostat. After you verify that the burners are lit, you may adjust the room thermostat to your own personal comfort setting. If the burners fail to light, shut down your furnace and call your dealer for service. Refer to the lighting instruction label affixed to your furnace blower access door or page 6 for shutdown procedures. NOTE: To conserve energy when the heating season has ended, you should shut down your manually ignited pilot. Follow the procedures in the “Shutting Down Your Furnace" section of this manual. AUTOMATIC INTERMITTENT IGNITION PILOT NOTE: Your gas valve may be different from that pictured. Refer to the operating instructions label affixed to your furnace blower access door (See Figs. 1 and 2 for door identification.) for the correct picture. A WARNING Never attempt to manually light the pilot on a furnace that has an intermittent ignition system by using a match or any other source of flame. A failure to adhere to this warning can result in an explosion, fire, electrical shock, personal injury, or death. 1. Adjust your room thermostat to the lowest temperature setting. See Fig. 7. 2. Close the external manual gas valve. See Fig. 8. 3. Turn OFF the electrical supply to your furnace. See Fig. 9. 4. Remove the access door(s) of your furnace. Lift up and out at the bottom. See Fig. 10 or 11. NOTE: The blower access door must be installed to permit furnace operation. On downflow furnaces, the blower access door must be removed before the control access door is removed, then reinstalled. 5. Turn the control knob of the internal gas valve clockwise or counterclockwise (depending on the type valve supplied with your furnace) to the indicated OFF position. Wait 5 minutes for any expelled gas to dissipate. See Fig. 18. 6. After waiting 5 minutes, turn the control knob to the ON position. 7. Replace the access door. Insert door end into furnace, push the door in and down. See Fig. 15 or 16. On downflow furnaces, remove the blower access door, install the control access door, then reinstall the blower access door. 8. Turn on the electrical supply to the furnace. 9. Open the external manual gas valve. See Fig. 13. 10. Adjust the room thermostat to a setting slightly above room temperature. This will automatically signal the furnace to start. If your furnace is equipped with an optional vent damper, see Fig. 6 and VENT DAMPER paragraph above Fig. 6 for information about the vent damper. 11. The pilot ignition system will spark, lighting the pilot flame. After 40 to 70 seconds—a timed delay to permit verification that the pilot has been lit, the gas valve permits gas to flow to the burners where it is lit by the pilot. Flames warm the furnace’s heat exchanger. After a built-in time delay of approximately 75 seconds, the furnace blower is switched on. 12. Adjust your thermostat to the temperature that satisfies your comfort requirements. IF THE PILOT DOESN’T LIGHT, or the burners fail to ignite, or if the blower doesn't come on ... , shut down your furnace and call your dealer for service. Refer to the operating instruction label affixed to your furnace blower access door for shutdown procedures. SHUTTING DOWN YOUR FURNACE Once the heating season has ended, or if you ever suspect a malfunction, you’ll want to turn your furnace off. The following procedures and the procedures on the lighting/ operating instructions label on your furnace must be followed. Refer to the li...

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