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      06-17-2013, 11:28 PM   #4
foghat
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Drives: 2008 135i
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Quote:
Originally Posted by 1911A145 View Post
Get ready to change the water pump and thermostat...
But again, if this were water pump related, shouldn't one expect the fan to be going even if AC is off?

An old thread talked about a possible cause for this being a faulty temp sensor. But I would think similar, why only when AC on?

And honestly, I only noticed this a couple days ago by chance. It is possible it has been doing this for weeks or longer.
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