INSTRUMENTS AND CONTROLS 85
C0029219
1. Directs airflow through the dash panel air vents only.
4. Directs airflow through the floor vents and the windshield for defrosting and/or defogging.
2. Directs airflow through both the dash panel and floor air vents (bi-level).
5. Directs airflow only to the windshield for defrosting and/or defogging.
3. Directs airflow through the floor vents only. Note: The Mode Selection knob can be rotated to any position (see above). This allows the operator to select the desired amount of blend between the positions. 4. Fresh/Recirculation Switch or Button — Selects the cab intake air between fresh air (from outside the cab) and recirculated air (inside the cab). Note: For maximum air conditioner performance, select recirculated air. 5. Air Conditioner ON/OFF Switch or Button — Activates the air conditioning system. Note: When using the sleeper air conditioner, this switch must be turned ON.
https://www.truck-manuals.net/