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It is icing over and is either low of refrigerant or the coils are dirty.

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Q: Why the AC start to blow white vapor through vent in VW Passat?
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Why is my 1999 Saturn smoking white smoke from exhaust?

When an exhaust pipe is cool, the exhaust will start to allow water vapor to condense. If the exhaust is white you're seeing a vapor cloud; it's normal and unavoidable. Once the engine and exhaust are warm, the vapor cloud should stop.


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