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      10-21-2016, 07:58 PM   #4
Hoooper
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Drives: 335D
Join Date: Jun 2013
Location: Petaluma, CA

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The aux pump circulates through the heater in the cabin I believe. It is possible for that to contribute to low coolant temps if it malfunctions but I would think you would notice as it would have to have a tradeoff of uncontrollably warm temps in the cabin.
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