It is possible the heater core is leaking, when you turn the heater on does it have a kind of sweet sickening smell to it? If so its probably heater core related, if not check all window and door seals for debris, and cleanliness. Have you had a new windshield installed in the car? If so this is also a possibility. Thanks for using2CarPros
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Wednesday, November 7th, 2012 AT 3:56 PM