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Discussion Starter · #1 ·
ACC occasionally blows warm air when it should be blowing cold. Typically notice through the vents along the front of the dash which blow at body level as opposed to the screen vents. However, cannot discount that warm air is being blown from other vents (floor or screen) as I've only noticed this on journeys.

Tried the ACC callibration steps and no faults are shown whereas I was expecting blend door faults.

The warm air is only blown for a few seconds and then it reverts to cold.

Could it be a faulty cabin temperature sensor? Would these codes show on the auto callibration or is it a Tech II analysis?

Anyone else experience the above?
 

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I am having exactly the same issue. No ACC codes. Mine happens under braking frequently. It is making me crazy. If you find out what it is post it!
 
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