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GENERAL OPERATING TIPS
Manual Heating and Air Conditioning System
• To reduce fog build-up on the windshield during humid weather, select
Defrost. Temperature and fan speed can also be increased to improve
clearing.
• To reduce humidity build-up inside the vehicle, do not drive with the
system off or with recirculated air engaged.
• Do not put objects under the front seats that will interfere with the
airflow to the back seats.
• Remove any snow, ice or leaves from the air intake area at the base of
the windshield.
• 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 mode, adjust the blower fan speed to the lowest setting
and put the vehicle’s transmission into position P to continue to receive
cool air from your A/C system.
For maximum cooling performance in AUTO or panel mode, press MAX
A/C.
For maximum cooling performance in panel/floor mode:
1. Move temperature control to the coolest setting.
2. Select A/C and recirculated air to provide colder airflow.
3. Set the fan to the highest speed initially, then adjust to maintain
comfort.
To aid in side window defogging and demisting in cold or humid weather:
1. Select Floor/Panel.
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 toward the side windows.
6. To increase airflow to the outer instrument panel vents, close the
vents located in the middle of the instrument panel.
Climate Control 149
2013 F-250/350/450/550 (f23)
Owners Guide gf, 1st Printing
USA (fus)
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