FORD 2011 F-550 v.4 - Manual (Page 83)

• To improve the A/C cool down, drive with the windows slightly open
for 2-3 minutes after start up or until the vehicle has been “aired out”.
• A small amount of air may be felt from the floor vent regardless of the
air distribution setting that is selected.
During extreme high ambient temperatures when idling stationary for
extended periods of time in gear, it is recommended to run the A/C in
the max A/C position, reduce blower fan speed from the highest setting
and put the vehicle’s transmission into the P (Park) gear position
(automatic transmission only) to continue to receive cool air from your
A/C system.
For maximum cooling performance:
• Automatic operation:
1. Press AUTO for full automatic operation.
2. Do not override A/C or (recirculated air).
3. Set the temperature to 60°F (16°C).
• Manual operation:
1. Select MAX A/C.
2. Select (recirculated air). Use (recirculated air) with A/C to
provide colder airflow.
3. Set the temperature to 60°F (16°C).
4. Set highest fan speed initially, then adjust to maintain comfort.
To aid in side window defogging/demisting in cold weather:
1. Select (panel/floor).
2. Select A/C.
3. Adjust the temperature control to maintain comfort.
4. Set the fan speed to the highest setting.
5. Direct the outer instrument panel vents towards the side windows.
To increase airflow to the outer instrument panel vents, close the vents
located in the middle of the instrument panel.
Climate Controls
83
2011 F-250/350/450/550 (f23)
Owners Guide, 4th Printing
USA (fus)