Quote:
Originally Posted by mbdoc
Yes, the aux coolant pump should be running any time the truck is running. IT pulls coolant thru the heater core.
Should run up to 10 minutes after shutting off the engine as well
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Not to thread jack, but is this the case in the 201 as well? I've had my aux pump uplugged for a while now and have noticed no difference in heat temps.
Now in my 124, I think the aux pump has failed and I get very poor heat at low speeds.
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