Check the little pump below the brake booster for running and the coolant valve for movement.
Both hoses to fire wall should be hot.
Check for air lock in system.
Blend doors on this vehicle stop working....common complaint.
To verify Blend door movement, turn on ignition with engine off.
Run temp to max and the min..... listen under glove box for ( sliding ) motor noise as door swings from hot to cold.
This is a digital system needing a Jaguar scanner for diagnosis.
What about if a noise going " click click click " quite loudly and coming from dash ( glove compartment area ) occurs ? This is quite loud . Is motor still working on the doors ? Sean.
You are hearing the drive wheel cog jumping. Blend door is too stiff for drive cog to move the door.
Sound like a 'dash out' job....$$$$$$$$$
Noise should be a muffled scraping noise...like a credit card along a smooth surface.
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Air
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
In
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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