Jaguar XJ (2008 year). Manual - part 46

185

Climate Control

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Use of air recirculation

The air conditioner/heater system is 
supplied with fresh air via an intake flap.

Closing the flap causes the air inside the 
vehicle to be recirculated. This helps to 
prevent unpleasant odours from being 
drawn into the vehicle and also to improve 
the performance of the air conditioner in 
very hot conditions. However, the use of 
recirculated air will cause screen misting 
after a short period and should only be 
used as necessary.

In AUTO mode, the air intake flap is 
controlled automatically. If required, air 
recirculation may be manually selected 
for either a short or indefinite period.

!

WARNING:

To prevent humidity build up inside the 
vehicle and possible screen misting, 
avoid driving with the air conditioning 
system off or with manual air 
recirculation selected for prolonged 
periods.

GENERAL POINTS

To ensure the satisfactory operation of 
the climate control system, note the 
following points:
• Ensure that the external grille at the 

base of the windshield, which 
provides fresh air for the climate 
control system, is kept clear of leaves, 
snow or obstructions.

• A solar sensor, see item 1 on the next 

page, is mounted on the centre top of 
the facia. Ensure that this sensor is 
not covered.

• Temperature and humidity sensors, 

see item 2 on the next page, are 
located behind the small grille. Do not 
cover or obstruct the opening.

• Air ducts under the front seats supply 

the rear passenger footwells (see air 
distribution illustration). Objects or 
material placed under the seats may 
block or obstruct the open ducts.

• The external air intake to the air 

conditioner/heater system is fitted 
with a filter. Ensure that the filter is 
changed at the specified service 
intervals to maintain efficient 
operation.

• If the air conditioning system is not 

used frequently, it should be run 
briefly at least once each week, with a 
cold setting, to prevent the seals from 
drying out with subsequent refrigerant 
leaks.

• Moisture removed from the air by the 

air conditioning unit is discharged 
onto the road underneath the vehicle. 
After stopping, puddles of water may 
form underneath the vehicle.

Climate Control

186

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AIR DISTRIBUTION

1. Solar sensor.

2. Temperature and humidity sensors.

The illustration above shows the location 
of the air vents within the vehicle. The 
airflow from the facia face level vents is 
regulated using thumbwheel controls and 
adjustable direction vanes.

Air distribution between the windshield, 
facia and floor levels is selected 
automatically when operating in AUTO 
mode, but can be selected manually.

JAG0644

187

Front Climate Controls

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Front Climate Controls

FRONT CONTROL PANEL

1. Blower speed and system On/Off.

2. Display panel.

3. Fahrenheit/Celsius selector.

4. Air conditioner on/off.

5. Select automatic operation.

6. Recirculation/fresh air.

7. Increase right zone temperature.

8. Decrease right zone temperature.

9. Select air distribution.

10. Heated rear screen/door mirrors.

11. Heated front screen (optional).

12. Defrost windows.

13. Select dual/single temperature zone.

14. Increase left zone temperature.

15. Decrease left zone temperature.

16. Option without front screen heater.

The climate control functions are selected 
by push buttons and a rotary control. 
When a button is pressed, selection of the 
function is confirmed by a beep; most 
buttons also have an illuminated LED.

Many system functions also have graphic 
symbols displayed on the LCD (Liquid 
Crystal Display) screen.

Automatic control (AUTO) may be 
overridden at any time. Defrost/demist 
operation is available and also manual 
selection of blower speed, air distribution, 
recirculation, air conditioning and 
windshield heating.

Panel illumination

With the exterior lighting switched on, the 
graphics on the panel controls are 
illuminated by low level backlighting.

JAG0645

Front Climate Controls

188

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The illumination level is adjusted by the 
common instrument panel dimmer 
control (see page 138).

TO SWITCH THE SYSTEM ON

The climate control system operates in 
position II of the ignition switch.

With the ignition key turned to the run 
position, the system will switch on in the 
operating mode last set.

For normal usage select AUTO mode.

AUTO mode

Automatic operation provides a 
controlled environment over a 
temperature range of 17°C to 31°C 
(61°F to 89°F) and should be regarded as 
the normal operating mode.

To select automatic climate 
control press the AUTO 
button; the word AUTO 

appears on the LCD screen to confirm 
selection.

Front and rear screen heating and timed 
air recirculation may be selected in AUTO 
mode. Selecting any other control will 
cancel AUTO operation.

Automatic operation cannot be 
deselected using the AUTO button. To 
exit AUTO mode, select another mode or 
press the blower control knob to switch 
the system off.

Temperature selection

Separate controls allow 
the driver and front 
passenger zone 

temperatures to be independently 
adjusted. Press the red buttons to 
increase temperature and the blue 
buttons to decrease temperature.

Both driver and front passenger selected 
temperatures are always displayed.

Pressing the driver’s buttons to select the 
maximum or minimum temperature 
settings causes the display to change to 
HI or LO respectively and cancel 
AUTO mode.

To quickly jump from HI or LO to a 
convenient midrange temperature of 
23°C (73°F), press and hold AUTO for a 
few seconds.

Dual temperature zones

With the DUAL button LED 
illuminated, the system provides 
separate temperature control of 

the driver and front passenger zones.

Press DUAL to deselect dual temperature 
control (LED off); the front passenger 
temperature will change to that of the 
driver side. Using the driver side 
temperature control buttons will now 
change both zone temperatures together.

To select dual temperature control, press 
either the DUAL button or one of the front 
passenger side red/blue temperature 
control buttons. The DUAL LED is 
illuminated.

External temperature

The external (EXT) temperature is 
displayed at the top of the screen.

Press the button to change the 
scale between degrees 
Fahrenheit (°F) and degrees 
Celsius (°C) for the displayed 

internal and external (EXT) temperatures.