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HEATER ONLY SYSTEM
(IF EQUIPPED)
1. Fan speed adjustment: Controls
the volume of air circulated in the
vehicle.
2. Temperature selection:
Controls the temperature of the
airflow in the vehicle.
3. Air flow selections: Controls the direction of the airflow in the
vehicle. See the following for a brief description on each control.
: Distributes outside air through the instrument panel vents.
OFF: Outside air is shut out and the fan will not operate.
: Distributes outside air through the instrument panel vents and the
floor vents.
: Distributes outside air through the floor vents.
: Distributes outside air through the windshield defroster vents and
floor vents.
: Distributes outside air through the windshield defroster vents.
Operating tips
• To reduce fog build up on the windshield during humid weather, place
the air flow selector in the
position.
• To reduce humidity build up inside the vehicle during cold or warm
weather, do not drive with the air flow selector in the OFF position.
• Under normal weather conditions, do not leave the air flow selector in
OFF when the vehicle is parked. This allows the vehicle to “breathe”
using the outside air inlet vents.
• Do not put objects under the front seats that will interfere with the air
flow to the back seats.
• Remove any snow, ice or leaves from the air intake area at the base of
the windshield.
2003 F250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA English (fus)
Climate Controls
Climate Controls
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