Air Conditioning problem
2002 Jaguar XJ8 V8 Two Wheel Drive Automatic 40000 miles
With the aiircon on auto, set at 70deg after around 30 mins of driving the fan speed increases to max and only cold air flows, before that it seems ok.
Changing any of the controls does not fix the problem. You can hear a series of clicks from what sounds to come from the central vents, it sounds like the fllap servo motor gear is running on too long.
These clicks even continue after the heater/aircon is turned off.
If the engine is turned off and left to cool the heater/aircon returns to normal (for the next 30 minutes).
My theory is that after around 30 mins the climate system need to cool the car and some sensor is not working correctly and the cooling and the fan are set to max.
I have run the diagnostics and it is showing failues of left, center and right vent servo motors. It seems unlikey that all three servos have a problem.
Any ideas of where the problem may lie or any other tests I could do to track it down.
Saturday, February 28th, 2009 AT 1:53 PM