2021 FORD MUSTANG climate control

4. Adjust the blower motor speed to the
lowest speed setting.
Defogging the Side Windows in
Cold Weather
1. Direct air to the instrument panel and windshield air vents.
2. Press and release A/C.
3. Adjust the temperature control to the setting you prefer.
4. Adjust the blower motor speed to the highest setting.
5. Direct air toward the side windows.
6. Close the instrument panel air vents.
HINTS ON CONTROLLING THE
INTERIOR CLIMATE -
VEHICLES WITH: AUTOMATIC
TEMPERATURE CONTROL
General Hints
Note: Prolonged use of recirculated air may
cause the windows to fog up.
Note: You may feel a small amount of air
from the footwell air vents regardless of the
air distribution setting.
Note: To reduce humidity build-up inside
your vehicle, do not drive with the system
switched off or with recirculated air always
switched on.
Note: Do not place objects under the front
seats as this may interfere with the airflow
to the rear seats.
Note: Remove any snow, ice or leaves from
the air intake area at the base of the
windshield.
Note: To improve the time to reach a
comfortable temperature in hot weather,
drive with the windows open until you feel
cold air through the air vents. Automatic Climate Control
Note:
Adjusting the settings when your
vehicle interior is extremely hot or cold is
not necessary. Automatic mode is best
recommended to maintain set temperature.
Note: The system adjusts to heat or cool
the interior to the temperature you select
as quickly as possible.
Note: For the system to function efficiently,
the instrument panel and side air vents
should be fully open.
Note: If you select
AUTO during cold
outside temperatures, the system directs
air flow to the windshield and side window
air vents. In addition, the blower motor may
run at a slower speed until the engine warms
up.
Note: If you select
AUTO during hot
temperatures and the inside of the vehicle
is hot, the system uses recirculated air to
maximize interior cooling. Blower motor
speed may also reduce until the air cools.
Quickly Heating the Interior
1. Press and release
AUTO.
2. Adjust the temperature function to the
setting you prefer.
Recommended Settings for
Heating
1. Press and release
AUTO.
2. Adjust the temperature function to the
setting you prefer. Use
72°F (22°C) as
a starting point, then adjust the setting
as necessary.
Quickly Cooling the Interior
1. Press and release
MAX A/C.
Recommended Settings for
Cooling
1. Press and release
AUTO.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Climate Control

2.
Adjust the temperature function to the
setting you prefer. Use 72°F (22°C) as
a starting point, then adjust the setting
as necessary.
Defogging the Side Windows in
Cold Weather
1. Press and release defrost or maximum
defrost.
2. Adjust the temperature control to the setting you prefer. Use
72°F (22°C) as
a starting point, then adjust the setting
as necessary.
HEATED REAR WINDOW 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. The vehicle warranty may not
cover damage to the heated rear window
grid lines.
HEATED EXTERIOR MIRRORS
(IF EQUIPPED)
When you switch the heated rear window
on, the heated exterior mirrors turn on.
Note: Do not remove ice from the mirrors
with a scraper or adjust the mirror glass
when it is frozen in place.
Note: Do not clean the mirror housing or
glass with harsh abrasives, fuel or other
petroleum-based cleaning products. The
vehicle warranty may not cover damage
caused to the mirror housing or glass.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Climate ControlE184884

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
The cabin air filter is behind the glovebox.
Note:
The filter access door is above the
passenger footwell under the instrument
panel.
REPLACING THE CABIN AIR
FILTER
Replace the filter at regular intervals. See
Scheduled Maintenance (page 441).
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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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Interior Air Quality

REAR SEATS
WARNING: When folding the seat
backrest down, take care not to get your
fingers caught in the mechanism. WARNING:
Make sure that the
seats and the seat backrests are secure
and fully locked in their catches.
Accessing the Rear Seats Use the seatback release to fold the back
of the front seat forward for rear seat
access. The release handle is on the upper
back of the front seat. The seatback has
memory and locks automatically in the
original position. Second Row Split-Folding Rear
Seat
(If Equipped) To lower the seatback(s):
1. Pull the strap to release the seatback.
2. Fold the seatback down.
Returning the Seatbacks to the Upright
Position
When raising the seatback(s), push the
top of the seatback rearward and make
sure you hear the seat latch into place. Pull
down on the seatback to make sure that
it has locked into position.
CLIMATE CONTROLLED SEATS
(IF EQUIPPED)
Heated Seats
WARNING: People who are unable
to feel pain to their skin because of
advanced age, chronic illness, diabetes,
spinal cord injury, medication, alcohol
use, exhaustion or other physical
conditions, must use caution when using
the heated seat. The heated seat may
cause burns even at low temperatures,
especially if used for long periods of time.
Do not place anything on the seat that
may block the heat, such as a blanket or
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing SeatsE207088 E175611

•
You can reset the timer by interacting
with your vehicle (such as pressing the
brake pedal or accelerator pedal).
• You can temporarily switch off the
shutdown feature any time the ignition
is on (for the current ignition cycle
only). Use the information display to
do so. See Information Displays
(page 99).
• During the countdown before engine
shutdown, you are prompted to press
OK or RESET (depending on your type
of information display) to temporarily
switch the feature off (for the current
ignition cycle only).
Stopping the Engine When Your
Vehicle is Stationary
1. Move the transmission selector lever to park (P) (automatic transmission)
or neutral (manual transmission).
2. Press the button once.
3. Apply the parking brake.
Note: This switches off the ignition, all
electrical circuits, warning lamps and
indicators.
Note: If the engine is idling for 30 minutes,
the ignition and engine automatically shut
down.
Stopping the Engine When Your
Vehicle is Moving WARNING:
Switching off the
engine when the vehicle is still moving
will result in a loss of brake and steering
assistance. The steering will not lock, but
higher effort will be required. When the
ignition is switched off, some electrical
circuits, including air bags, warning lamps
and indicators may also be off. If the
ignition was turned off accidentally, you
can shift into neutral (N) and re-start the
engine. 1. Move the transmission selector lever
to the neutral position and use the
brakes to bring your vehicle to a safe
stop.
2. When your vehicle has stopped, move the transmission selector lever to park
(P) (automatic transmission) or
neutral (manual transmission).
3. Press and hold the button for one second, or press it three times within
two seconds.
4. Apply the parking brake.
Guarding Against Exhaust Fumes WARNING:
If you smell exhaust
fumes inside your vehicle, have your
vehicle checked by your authorized
dealer immediately. Do not drive your
vehicle if you smell exhaust fumes.
Carbon monoxide is present in exhaust
fumes. Take precautions to avoid its
dangerous effects.
Important Ventilating Information
If you stop your vehicle and the leave the
engine idling for long periods, 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.
ENGINE BLOCK HEATER
(IF
EQUIPPED) WARNING:
Failure to follow engine
block heater instructions could result in
property damage or serious personal
injury.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Starting and Stopping the Engine

WARNING: Do not use your heater
with ungrounded electrical systems or
two-pronged adapters. There is a risk of
electrical shock. WARNING: Do not fully close the
hood, or allow it to drop under its own
weight when using the engine block
heater. This could damage the power
cable and may cause an electrical short
resulting in fire, injury and property
damage.
Note: The heater is most effective when
outdoor temperatures are below
0°F
(-18°C).
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:
• 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.
• If the block heater cord is under the
hood, Do Not remove the wiring from
its original location. Do Not close the
hood on the extension wiring.
• Make sure your vehicle is parked in a
clean area, clear of combustibles.
• 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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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Starting and Stopping the Engine

Protected Component
Fuse Rating
Fuse or Relay
Number
Electronic fan 1 (GT500).
60A 1
1
Not used (base).
—
Not used.
—
2
Electronic fan 1 (base).
30A 1
3
Not used (GT500).
—
Electronic fan 3 (base).
40A 1
4
Not used (GT500).
—
Automatic brake system pump.
50A 1
5
Body control module.
50A 1
6
Body control module.
60A 1
7
Body control module.
50A 1
8
Rear window defroster.
40A 1
9
Blower motor.
40A 1
10
Left-hand front window.
30A 2
11
Driver seat.
30A 2
12
Passenger seat.
30A 2
13
Climate controlled seat module.
30A 2
14
Convertible top slave motor (base).
20A 2
15
Not used (GT500).
—
Charge air cooler pump (GT500).
15A 2
16
Not used (base).
—
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Fuses

WARNING: This vehicle may have
more than one battery. Removing the
battery cables from only one battery
does not disconnect your vehicle
electrical system. Make sure you
disconnect the battery cables from all
batteries when disconnecting power.
Failure to do so may cause serious
personal injury or property damage. WARNING:
For vehicles with
Auto-Start-Stop the battery requirement
is different. You must replace the battery
with one of exactly the same
specification.
The battery is in the engine compartment.
See
Under Hood Overview (page 258).
Your vehicle has a maintenance-free
battery. It does not require additional
water during service.
If the vehicle battery has a cover and vent
hose, make sure you correctly install it after
cleaning or replacing the battery.
For longer, trouble-free operation, keep the
top of the battery clean and dry and the
battery cables tightly fastened to the
battery terminals. If any corrosion is
present on the battery or terminals, remove
the cables from the terminals and clean
with a wire brush. You can neutralize the
acid with a solution of baking soda and
water.
We recommend that you disconnect the
negative battery cable terminal from the
battery if you plan to store your vehicle for
an extended period.
Note: If you only disconnect the negative
battery cable terminal, make sure it is
isolated or placed away from the battery
terminal to avoid unintended connection or
arcing. If you replace the battery make sure it
matches the electrical requirements of
your vehicle.
If you disconnect or replace the battery
and your vehicle has an automatic
transmission, it must relearn its adaptive
strategy. Because of this, the transmission
may shift firmly when first driven. This is
normal operation while the transmission
fully updates its operation to optimum
shift feel.
Battery Management System
(If
Equipped)
The battery management system monitors
battery conditions and takes actions to
extend battery life. If excessive battery
drain is detected, the system temporarily
disables some electrical systems to
protect the battery.
Systems included are:
• Heated rear window.
• Heated seats.
• Climate control.
• Heated steering wheel.
• Audio unit.
• Navigation system.
A message may appear in the information
displays to alert you that battery
protection actions are active. These
messages are only for notification that an
action is taking place, and not intended to
indicate an electrical problem or that the
battery requires replacement.
After battery replacement, or in some
cases after charging the battery with an
external charger, the battery management
system requires eight hours of vehicle sleep
time to relearn the battery state of charge.
During this time your vehicle must remain
fully locked with the ignition switched off.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Maintenance