overheating FORD F-150 2021 User Guide

The air conditioning may automatically
turn on and off during severe operating
conditions to protect the engine from
overheating. When the coolant
temperature decreases to the normal
operating temperature, the air conditioning
turns on.
If the coolant temperature gauge moves
fully into the red zone, or if the coolant
temperature warning or service engine
soon messages appear in your information
display, do the following:
1. Stop your vehicle as soon as it is safe
to do so. Fully apply the parking brake,
shift into park (P) or neutral (N).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. If the
temperature does not drop after
several minutes, follow the remaining
steps.
3. Switch the engine off and wait for it to
cool. Check the coolant level.
4. If the coolant level is at or below the minimum mark, add prediluted coolant
immediately.
5. If the coolant level is normal, restart the engine and continue. ENGINE AIR FILTER
CHECKING THE ENGINE AIR
FILTER RESTRICTION GAUGE -
DIESEL
The air filter restriction gauge is in the
upper housing of the air filter assembly.
Check the air filter restriction gauge
whenever you open the hood to carry out
general engine maintenance. Change the
air filter element when the restriction
gauge reads near the change filter line and
the gauge is yellow. Allowing the restriction
gauge to reach maximum affects engine
performance and fuel economy.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Maintenance E254173

It is important to rely upon your dealership
to properly diagnose and repair your
vehicle.
We strongly recommend only using our
genuine or our authorized re-manufactured
replacement parts engineered for your
vehicle.
Additives and Chemicals
We do not recommend using chemicals or
additives not approved by us as part of
your vehicle
’s normal maintenance. Please
consult your warranty information.
Oils, Fluids and Flushing
In many cases, fluid discoloration is a
normal operating characteristic and, by
itself, does not necessarily indicate a
concern or that the fluid needs to be
changed. Have discolored fluids that also
show signs of overheating or foreign
material contamination checked
immediately. Make sure to change the vehicle
’s oils and
fluids at the specified intervals or in
conjunction with a repair. Flushing is a
viable way to change fluid for many vehicle
sub-systems during scheduled
maintenance. It is critical that systems are
flushed only with new fluid that is the same
as that required to fill and operate the
system or using our approved flushing
chemical.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections. Check Every Month
The air filter restriction gauge. 1
The engine oil level.
Function of all interior and the exterior lights.
The tires including the spare for wear and proper pressure. The windshield washer fluid level.
The fuel and water separator. Drain if necessary or if indicated by the information display. 1
The holes and slots in the tail pipe to make sure they are functional and clear of debris. 1
1 Diesel vehicles only.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Scheduled Maintenance