2021 FORD F-350 climate control

Switching Dual Mode On and Off
Press the button.
CLIMATE CONTROL –
TROUBLESHOOTING
Climate Control – Frequently
Asked Questions
Why is the volume of air to the rear
passenger compartment limited ? Objects may obstruct the air direction
to the rear passenger compartment.
Make sure objects have not been
placed under the front seats.
Why is the volume of air from the air
vents reduced? The air intake area at the base of the
windshield could be obstructed. Make
sure the air intake area is free from any
snow, ice or leaves.
What are the recommended settings
for heating the interior? Auto mode on and instrument panel
and side air vents fully open.
How can I quickly heat the interior? Select the highest blower motor
speed, highest temperature and direct
the air to the footwell air vents.
What are the recommended settings
for cooling the interior? Auto mode on.
How can I quickly cool the interior? Switch maximum cooling on, switch
recirculated air on and drive with the
windows open until you feel cold air
through the air vents. How can I reduce the humidity build-up
inside my vehicle?
Do not drive with the system off or
with recirculated air on.
How can I defog the side windows? Switch maximum defrost on.
How can I defog or clear the windshield
of thin ice? Switch maximum defrost on.
Why do I feel air from the footwell air
vents regardless of the air
distribution? This is normal operation. You may feel
a small amount of air from the
footwell air vents regardless of the air
distribution.
What happens if I switch auto mode on
when the outside temperature and
in-vehicle temperature is high? The system temporarily selects
recirculated air to maximize cooling.
What happens if I switch auto mode on
when the outside temperature is low
and the engine is cold? Air is directed to the windshield and
the outer instrument panel air vents.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Climate Control - Vehicles With: Automatic Temperature
ControlE265280

IDENTIFYING THE CLIMATE
CONTROL UNIT
Depending on your vehicle options, the
controls could look different than what you
see here.
SWITCHING CLIMATE
CONTROL ON AND OFF
Press the button.
SWITCHING RECIRCULATED
AIR ON AND OFF Press the button to recirculate
air currently in the passenger
compartment.
Note: Recirculated air could turn off or be
prevented from turning on in all air flow
modes except maximum cooling to reduce
the risk of the windows fogging up.
Note: Recirculated air could turn on and off
when you direct air to the instrument panel
or footwell air vents during hot weather to
improve cooling efficiency. SWITCHING AIR
CONDITIONING ON AND OFF Press the button.
Note: Under certain conditions, the air
conditioning compressor could continue to
operate after you switch air conditioning off.
SWITCHING MAXIMUM
DEFROST ON AND OFF Turn the temperature control
clockwise past the highest
setting to maximize defrosting.
Note: The temperature control springs back
to the highest setting.
Air flows through the windshield air vents,
and the blower motor adjusts to the
highest speed.
Note: To prevent window fogging, you
cannot select recirculated air when
maximum defrost is on.
Note: The heated rear window also turns
on when you select maximum defrost.
SWITCHING MAXIMUM
COOLING ON AND OFF Turn the temperature control
counterclockwise past the
lowest setting to maximize
cooling.
Note: The temperature control springs back
to the lowest setting.
Note: When you switch maximum cooling
off, air conditioning remains on.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Climate Control - Vehicles With: Manual Temperature ControlE308141

SWITCHING THE HEATED
REAR WINDOW ON AND OFF (IF
EQUIPPED)
Press the button to clear the rear
window of thin ice and fog. The
heated rear window turns off
after a short period of time.
Note: Do not use harsh chemicals, razor
blades or other sharp objects to clean or
remove decals from the inside of the heated
rear window as this could cause damage to
the heated rear window grid lines not
covered by the vehicle Warranty.
SWITCHING THE HEATED
MIRRORS ON AND OFF (IF
EQUIPPED) Press the button.
SETTING THE BLOWER MOTOR
SPEED Note:
Lights on the control illuminate to
indicate the blower motor speed.
Note: When you switch the blower motor
off, air conditioning turns off and the
windows could fog up. SETTING THE TEMPERATURE
Turn the temperature control
counterclockwise for cooler temperature
settings.
Turn the temperature control clockwise
for warmer temperature settings.
DIRECTING THE FLOW OF AIR
Directing Air to the Windshield Air
Vents
Press the button.
Directing Air to the Instrument
Panel Air Vents Press the button.
Directing Air to the Footwell Air
Vents Press the button.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Climate Control - Vehicles With: Manual Temperature Control E266189 E244106 E244097

CLIMATE CONTROL –
TROUBLESHOOTING
Climate Control – Frequently
Asked Questions
Why is the volume of air to the rear
passenger compartment limited?
Objects may obstruct the air direction
to the rear passenger compartment.
Make sure objects have not been
placed under the front seats.
Why is the volume of air from the air
vents reduced? The air intake area at the base of the
windshield could be obstructed. Make
sure the air intake area is free from any
snow, ice or leaves.
What are the recommended settings
for heating the interior? A medium blower motor speed
selected and the air directed to the
footwell and windshield air vents.
How can I quickly heat the interior? Select the highest blower motor
speed, highest temperature and direct
the air to the footwell air vents.
What are the recommended settings
for cooling the interior? Air conditioning on, a medium blower
motor speed selected and air directed
to the footwell and windshield air
vents.
How can I quickly cool the interior? Switch maximum cooling on, switch
recirculated air on and drive with the
windows open until you feel cold air
through the air vents. How can I reduce the humidity build-up
inside my vehicle?
Do not drive with the system off or
with recirculated air on.
How can I defog the side windows? Switch maximum defrost on.
How can I defog or clear the windshield
of thin ice? Switch maximum defrost on.
Why do I feel air from the footwell air
vents regardless of the air
distribution? This is normal operation. You may feel
a small amount of air from the
footwell air vents regardless of the air
distribution.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Climate Control - Vehicles With: Manual Temperature Control

WHAT IS THE CABIN AIR
FILTER
The cabin air filter improves the quality of
air in your vehicle by trapping dust, pollen
and other particles.
LOCATING THE CABIN AIR
FILTER
You can locate the cabin air filter behind
the glove box.
REPLACING THE CABIN AIR
FILTER
Replace the filter at regular intervals. See
Scheduled Maintenance (page 565).
Note: Make sure you have a cabin air filter
installed at all times. This prevents foreign
objects from entering the system. Running
the system without a filter in place could
result in degradation or damage to the
system.
Note: Using an aftermarket cabin air filter
could reduce cabin air filtration and climate
control performance.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Interior Air Quality

Cold Weather Starting (Flexible
Fuel Vehicles Only)
The starting characteristics of all grades
of E85 ethanol make it unsuitable for use
when ambient temperatures fall below
0°F (-18°C). Consult your fuel distributor
for the availability of winter grade ethanol.
As the outside temperature approaches
freezing, ethanol fuel distributors should
supply winter grade ethanol, the same as
with unleaded gasoline.
If summer grade ethanol is used in cold
weather conditions, 0°F (-18°C), you may
experience increased cranking times, rough
idle or hesitation until the engine has
warmed up.
You may experience a decrease in
performance when the engine is cold when
operating on E85 ethanol.
Do not use starting fluid such as ether in
the air intake system. Such fluid could
cause immediate explosive damage to the
engine and possible personal injury.
If you should experience cold weather
starting problems on E85 ethanol, and
neither an alternative brand of E85 ethanol
nor an engine block heater is available, the
addition of unleaded gasoline to your tank
improves cold starting performance. Your
vehicle is designed to operate on E85
ethanol alone, unleaded gasoline alone, or
any mixture of the two.
If the Engine Fails to Start Using the
Preceding Instructions (Flexible Fuel
Vehicles Only)
1. Press the accelerator pedal down one-third to one-half of its travel, and
then crank the engine.
2. When the engine starts, release the key, then gradually release the
accelerator pedal as the engine speed
increases. If the engine still does not
start, repeat Step 1. Guarding Against Exhaust Fumes WARNING:
Exhaust leaks may
result in entry of harmful and potentially
lethal fumes into the passenger
compartment. If you smell exhaust
fumes inside your vehicle, have your
vehicle inspected immediately. Do not
drive if you smell exhaust fumes.
Important Ventilating Information
If you stop your vehicle and then leave the
engine idling for long periods of time, we
recommend that you do one of the
following:
• Open the windows at least
1 in
(2.5 cm).
• Set your climate control to outside air.
STARTING A DIESEL ENGINE -
6.7L DIESEL
Read all starting instructions carefully
before you start your vehicle.
For temperatures below
32°F (0°C), the
use of the correct grade engine oil is
essential for proper operation. Refer to
engine oil specifications for more
information. See
Engine Oil Capacity
and Specification (page 449).
Your vehicle may have a cold weather
starting strategy that prevents severe
engine damage by assisting in engine
lubrication warm-up. In extremely cold
ambient temperatures, this strategy
activates and prevents the accelerator
pedal from being used for 30 seconds after
you start your vehicle. A message appears
in the information display as your vehicle
warms up. By not allowing the accelerator
pedal to be used, the engine oil is allowed
to properly lubricate the bearings
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Starting and Stopping the Engine

Note:
The heater is most effective when
outdoor temperatures are below 0°F
(-18°C).
For cold climates that are below
0°F
(-18°C) needing a temporary battery
installation. Order the cold climate pack.
The heater acts as a starting aid by
warming the engine coolant. This allows
the climate control system to respond
quickly. The equipment includes a heater
element (installed in the engine block) and
a wire harness. You can connect the
system to a grounded 120-volt AC
electrical source. We recommend that you do the following
for a safe and correct operation:
•
Make sure your vehicle is parked in a
clean area, clear of combustibles.
• Locate the block heater cord near the
center of the lower front fascia.
• Use a 16-gauge outdoor extension cord
that is product certified by
Underwriter ’s Laboratory (UL) or
Canadian Standards Association
(CSA). This extension cord must be
suitable for use outdoors, in cold
temperatures, and be clearly marked
Suitable for Use with Outdoor
Appliances. Do not use an indoor
extension cord outdoors. This could
result in an electric shock or become a
fire hazard. •
Use as short an extension cord as
possible.
• Do not use multiple extension cords.
• Make sure that when in operation, the
extension cord plug and heater cord
plug connections are free and clear of
water. This could cause an electric
shock or fire.
• Make sure the heater, heater cord and
extension cord are firmly connected.
• Check for heat anywhere in the
electrical hookup once the system has
been operating for approximately 30
minutes.
• Make sure the system is unplugged and
properly stowed before starting and
driving your vehicle. Make sure the
protective cover seals the prongs of the
block heater cord plug when not in use.
• Make sure the heater system is
checked for proper operation before
winter.
Using the Engine Block Heater
Make sure the receptacle terminals are
clean and dry prior to use. Clean them with
a dry cloth if necessary.
The heater uses 0.4 to 1.0 kilowatt-hours
of energy per hour of use. The system does
not have a thermostat. It achieves
maximum temperature after
approximately three hours of operation.
Using the heater longer than three hours
does not improve system performance and
unnecessarily uses electricity.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Starting and Stopping the EngineE308417

Only use diesel exhaust fluid that is
certified by the American Petroleum
Institute (API). Non-certified diesel exhaust
fluid use can cause damage not covered
by the vehicle Warranty.
Note:
Do not put diesel exhaust fluid in the
fuel tank. This can cause damage not
covered by the vehicle Warranty.
You can purchase diesel exhaust fluid at
an authorized dealer, most highway truck
stops or you can contact roadside
assistance for help in finding a retailer that
sells diesel exhaust fluid. In addition, there
is a government website to help you find
the nearest location to purchase diesel
exhaust fluid:
http://www.discoverdef.com.
Filling the Diesel Exhaust Fluid Tank
Using a Fuel Station Pump
Filling the diesel exhaust fluid tank using
a nozzle is similar to fuel fill. The nozzle
shuts off automatically when the tank is
full. Do not continue to fill the tank as this
could cause spilling or overflow, potentially
damaging the tank.
Filling the Diesel Exhaust Fluid Tank
Using a Container
The following procedure applies to
Motorcraft diesel exhaust fluid or similar
fluid containers. Always follow the
manufacturer's instructions.
1. Remove the diesel exhaust fluid container cap. Place the spout on to
the container and tighten it until you
feel a strong resistance.
2. Remove the diesel exhaust fluid tank filler cap.
3. Insert the spout in to the filler neck until
the seal on the spout seats on to the
filler neck. Pour the fluid in to the tank.
When the tank is full the fluid stops
flowing automatically. 4. Return the container to the vertical
position slightly below the diesel
exhaust fluid filler neck. Allow any fluid
remaining in the spout to drain back in
to the container.
5. Remove the spout from the diesel exhaust fluid filler neck. Replace the
diesel exhaust fluid tank cap.
6. Remove the spout from the diesel exhaust fluid container and replace the
cap.
Note: If there is diesel exhaust fluid left in
the container retain it for later use. The
spout is re-useable. Wash the spout with
clean water prior to storage. Do not use the
diesel exhaust fluid spout with any other
fluid.
Filling the Diesel Exhaust Fluid Tank in
Cold Climates
Diesel exhaust fluid may freeze if the
ambient temperature is below 12°F (-11°C).
Your vehicle has a preheating system
which allows diesel exhaust fluid to
operate below 12°F (-11°C). If you do not
use your vehicle for an extended period
when the ambient temperature is below
12°F (-11°C)
, the fluid in the tank may
freeze. If the tank is overfilled and the fluid
freezes it may damage the tank. This is not
covered by the vehicle warranty.
Diesel Exhaust Fluid Warning
Messages and Vehicle Operations WARNING:
Diesel exhaust fluid
must be refilled when low or replaced
when contaminated or your vehicle
speed becomes limited to
50 mph
(80 km/h). In these conditions, drive with
caution and refill diesel exhaust fluid
immediately. If the diesel exhaust fluid
becomes empty or contaminated and
fluid is not replaced, your vehicle
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Engine Emission Control