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Old 11-26-2009, 12:59 AM   #4
Mich_525
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Join Date: Jun 2007
Location: Toronto
Posts: 117
The reason why that aux pump is there , is when the weather hits -10C, when you stop at a traffic light (at low rpm) the coolant flow is weak and no hot anti-freeze gets to your heater core , then your fan blows cold air inside the cabin. I were you I would rather fix it before the real winter starts
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