Recirculation Mode

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The recirculation mode is only available on vehicles with air conditioning.

The recirculation mode limits the amount of outside air entering the cab. Press the recirculation button to prevent dusty or smoky air from entering the cab. The recirculation mode can also be used to decrease the time required to cool or heat the cab interior during extreme outside temperature conditions. When the recirculation mode is on, the recirculation indicator will be on. See Fig..

  1. Fan Switch

  2. Air Selection Switch

  3. Temperature Control Switch

  4. Recirculation Button

  5. Recirculation Indicator

Fig. 1, Climate Control Panel With Air Conditioning

The recirculation mode is not available when the air selection switch is in one of the following modes:

  • floor/defrost mode

  • selection between floor/defrost mode and defrost mode

  • defrost mode

When the recirculation mode is turned on, it will stay on for 20 minutes, or until the recirculation button is pressed again, or the air selection switch is turned to a defrost mode.

Important: On vehicles built before May 2, 2003, the recirculation mode turns off after twenty minutes and can be turned back on when the recirculation button is pressed again. On vehicles built from May 2, 2003, the system enters a partial recirculation mode for five minutes after being in full recirculation mode for 20 minutes. This cycle repeats as long as the system is in recirculation mode.

Note: To prevent the buildup of fumes or odors inside the cab on a vehicle built before May 2, 2003, do not use the recirculation mode for more than 20 minutes. It is recommended that the recirculation mode remains off for five minutes before it is turned back on.

Note:
Parent topic: Climate Control Panel
Document Number: 0000117690
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-05-09