The air is blowing from all other vents except the windscreen.

 

TSB XT412-02 has info for you but since you keep the car MY info a secret it might not apply.

bob

 

Here's one possible solution posted in this forum =
With the AC running, you could try a recalibration of the flap stepper motors as described by Jaguar as follows;


• Select full cooling (Lo)
• Select full heating (Hi)
• Back to full cooling
• Select face followed by floor
• Then select face again
• Finally select defrost

If there is any doubt, then a battery reset should be completed; wait two minutes before reconnection.

The other possibility is the blend door(s) =

they go by different names: actuators, stepper motors, and servo motors. Also air dampers, air flaps, and blend doors.

#1) The air inlet blend door either recycles cabin air or introduces fresh outside air.
#3) The defrost vent blend door directs air either to the windshield or face vents.
#4) The temperature blend door directs air either thru the heater core (when the temperature control is set to "HI") or bypassed the heater core (when set to "LOW").
#5) The footwell blend door directs air either to your feet or face vents.

First, remove the glove box to better see these actuators thru the glove box opening. Next, remove the #3 Defrost actuator from the air box, but leave the electrical wires connected to the actuator. Then, with the blower on:
(a) Manually rotate the end shaft of the defrost blend door. Hopefully you'll feel air flow changing between the defrost vents and face vents as you rotate the blend door. Take care not to push the end of the shaft into the air box.
(b) Change the passenger cabin controls to direct air at the windshield, then at the face, and back at the windshield, while holding and observing the #3 Defrost actuator. You may discover that the actuator motor runs, but stripped gears prevent it from turning the blend door. Used replacement actuators are available on eBay.

 

Welcome to the forum Gra1963,

I've deleted your duplicate of this question from General Tech Help.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham