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      01-04-2011, 08:45 AM   #2
GenePoole
Lieutenant
19

 
Drives: '06 E90 330i
Join Date: Apr 2010
Location: Brighton, IL


Posts: 537
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I believe there was a service bulletin on this a while back. I believe there is a temperature at which the system considered it too hot (and there was a setting for too low I believe) and the system would self-disable to keep from doing any damage. The setpoints were apparently a bit too conservative and subsequent software updates widened the spread.

Maybe someone will chime in with the actual SIB for this as I may have the details a bit off, but I believe a firmware update of the car (assuming it hasn't been done in a while) may take care of it.