I'm seeing coolant circulating - a strong flow into overflow bottle - when the heating is on high in the car.
When I turn off the heat I'm seeing no coolant circulating at all.
What are the typical causes of this?
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I'm seeing coolant circulating - a strong flow into overflow bottle - when the heating is on high in the car.
When I turn off the heat I'm seeing no coolant circulating at all.
What are the typical causes of this?
valve stuck or blockage, is the coolant clean?