2023 LINCOLN NAVIGATOR heating

Fail-Safe Cooling
Fail-safe cooling allows you to temporarilydrive your vehicle before any incrementalcomponent damage occurs. The fail-safedistance depends on ambient temperature,vehicle load and terrain.
How Fail-Safe Cooling Works
WARNING: If you continue to driveyour vehicle when the engine isoverheating, the engine could stop withoutwarning. Failure to follow this instructioncould result in the loss of control of yourvehicle.
If the engine begins to overheat,the coolant temperature gaugemoves toward the red zone:
A warning lamp illuminates and amessage may appear in theinformation display.
If the engine reaches a presetover-temperature condition, the engineautomatically switches to alternating cylinderoperation. Each disabled cylinder acts as anair pump and cools the engine.
When this occurs, your vehicle still operates,however:
•Engine power is limited.
•The air conditioning system turns off.
Continued operation increases the enginetemperature, causing the engine tocompletely shut down. Your steering andbraking effort increases in this situation.
When the engine temperature cools, you canre-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is for useduring emergencies only. Operate yourvehicle in fail-safe mode only as long asnecessary to bring your vehicle to rest ina safe location and seek immediate repairs.When in fail-safe mode, your vehicle willhave limited power, will not be able tomaintain high-speed operation, and maycompletely shut down without warning,potentially losing engine power, powersteering assist, and power brake assist,which may increase the possibility of acrash resulting in serious injury.
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir cap witha thick cloth to prevent the possibility ofscalding and slowly remove the cap.Failure to follow this instruction could resultin personal injury.
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Your vehicle has limited engine power whenin the fail-safe mode, drive your vehicle withcaution. Your vehicle does not maintainhigh-speed operation and the engine couldoperate poorly.
Remember that the engine is capable ofautomatically shutting down to preventengine damage. In this situation:
1.Pull off the road as soon as safelypossible and switch the engine off.
2.If you are a member of a roadsideassistance program, we recommend thatyou contact your roadside assistanceservice provider.
3.If this is not possible, wait for a shortperiod of time for the engine to cool.
4.Check the coolant level. If the coolantlevel is at or below the minimum mark,add prediluted coolant immediately.
5.When the engine temperature cools, youcan re-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
Note:If you continue to drive your vehicle infail-safe mode without repairing it, you willdamage your engine.
Engine Coolant TemperatureManagement (If Equipped)
WARNING: To reduce the risk ofcrash and injury, be prepared that thevehicle speed may reduce and the vehiclemay not be able to accelerate with fullpower until the coolant temperaturereduces.
If you tow a trailer with your vehicle, theengine may temporarily reach a highertemperature during severe operatingconditions, for example ascending a long orsteep grade in high ambient temperatures.
At this time, you may notice the coolanttemperature gauge moves toward the redzone and a message may appear in theinformation display.
You may notice a reduction in vehicle speedcaused by reduced engine power in orderto manage the engine coolant temperature. Your vehicle may enter this mode if certainhigh-temperature and high-load conditionstake place. The amount of speed reductiondepends on vehicle loading, grade andambient temperature. If this occurs, there isno need to stop your vehicle. You cancontinue to drive.
The air conditioning may automatically turnon and off during severe operatingconditions to protect the engine fromoverheating. When the coolant temperaturedecreases to the normal operatingtemperature, the air conditioning turns on.
If the coolant temperature gauge moves fullyinto the red zone, or if the coolanttemperature warning or service engine soonmessages appear in your information display,do the following:
1.Stop your vehicle as soon as it is safe todo so. Fully apply the parking brake, shiftinto park (P) or neutral (N).
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If your instrument cluster display resetsprematurely or becomes inoperative, youshould perform the oil change interval at sixmonths or 5,000 mi (8,000 km) from yourlast oil change. Never exceed one year or10,000 mi (16,000 km) between oil changeintervals.
You can drive your vehicle in such a way thatmay lead to higher oil consumption includingextended time at high engine speeds, highloads, engine braking, hard corneringmaneuvers, track and off-road usage. Underthese conditions, oil consumption ofapproximately 1 quart per 500 miles (1 literper 800 km) is possible. Check the engineoil level at every refueling and adjust tomaintain proper levels to avoid enginedamage.
You can also drive your vehicle in such a waythat dilutes and increases the level of oil byfrequent short trips that do not allow theengine to get to operating temperature,extended idling and low speed driving forlong periods of time.
It is important to rely upon your dealershipto properly diagnose and repair your vehicle.
We strongly recommend only using ourgenuine or our authorized re-manufacturedreplacement parts engineered for yourvehicle.
Additives and Chemicals
We do not recommend using chemicals oradditives not approved by us as part of yourvehicle’s normal maintenance. Please consultyour warranty information.
Oils, Fluids and Flushing
In many cases, fluid discoloration is a normaloperating characteristic and, by itself, doesnot necessarily indicate a concern or that thefluid needs to be changed. Have discoloredfluids that also show signs of overheating orforeign material contamination checkedimmediately.
Make sure to change the vehicle’s oils andfluids at the specified intervals or inconjunction with a repair. Flushing is a viableway to change fluid for many vehiclesub-systems during scheduled maintenance.It is critical that systems are flushed only withnew fluid that is the same as that requiredto fill and operate the system or using ourapproved flushing chemical.
Owner Checks and Services
Make sure you perform the following basicmaintenance checks and inspections.
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Switching Glare Free Lighting On andOff.......................................................................129
Glare Free Lighting –Troubleshooting..........................................130Glare Free Lighting – InformationMessages..........................................................130
Global Opening..............................................134Switching Global Opening On and Off..........135Using Global Opening........................................135What Is Global Opening.....................................134
Glossary of Tire Terminology....................443Glove Compartment....................................200Opening the Glove Compartment.................200
H
Headlamp AdjustingSee: Adjusting the Headlamps.......................427
Headlamps......................................................120Adjusting the Level of the Headlamps..........120Headlamp Indicators..........................................120Switching Headlamp Exit Delay On andOff.......................................................................120Using the High Beam Headlamps..................120
Headlamps – Troubleshooting...................121Headlamps – Frequently AskedQuestions...........................................................121
Head Up Display...........................................152Head Up Display – Troubleshooting..............155
Head Up Display Indicators........................154Head Up Display Settings...........................152Head Up Display – Troubleshooting........155Head Up Display – InformationMessages..........................................................155
Heated Seats..................................................173Heated Seat Precautions...................................173Switching the Heated Seats On and Off.......173
HeatingSee: Climate Control..........................................159
Hill Descent Control....................................250Hill Descent Control – Troubleshooting........251
Hill Descent Control Indicator....................251Hill Descent Control Precautions.............250Hill Descent Control –Troubleshooting..........................................251Hill Descent Control – InformationMessages..........................................................251
Hill Start Assist..............................................242Hill Start Assist – Troubleshooting.................242
Hill Start Assist Precautions.......................242Hill Start Assist – Troubleshooting..........242Hill Start Assist – InformationMessages.........................................................242
Hitches............................................................345Hooking Up a Trailer Using aWeight-Distributing Hitch.............................346Installing a Hitch.................................................345
Hood LockSee: Opening and Closing the Hood.............414
Horn...................................................................112How Does 911 Assist Work...........................70How Does ActiveGlide™ Work..................286How Does Active Park Assist Work.........265How Does Adaptive Cruise Control WithStop and Go Work.....................................270How Does Auto Hold Work.......................243How Does Blind Spot Information SystemWork................................................................311How Does Cross Traffic Alert Work..........317How Does Drive Mode ControlWork..............................................................294How Does Driver Alert Work.....................330How Does Easy Entry and Exit Work.........97How Does Four-Wheel Drive Work.........224How Does Hill Descent ControlWork..............................................................250How Does Hill Start Assist Work..............242How Does Pre-Collision Assist Work.......321How Does Reverse Braking AssistWork..............................................................238
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