Any guess is a good guess in your description of a one time event. I doubt that your new alternator is a problem, the battery had plenty of charge.
When is the last time you replaced the cabin filter? The air drawn through the filter also comes from the computer box in the engine bay and keeps the circuit boards cool.
To anyone else reading this, never run the car with the cabin blower turned off or the recycle switch on for any length of time. Either of these conditions can destroy the engine computers!!!
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My name is Klaus and I am a V♂lv♂holic
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