GF83.20-P-2003GH Heater Circuit Function

GF83.20-P-2003GH Heater Circuit Function







Function
The coolant pump (5) pumps cold coolant through the engine. The coolant absorbs the engine's heat and becomes heated. The heated coolant is then conducted through the heat exchanger (2). The air blowing by the heat exchanger (2) is heated and conducted into the vehicle interior.

The coolant is routed over the coolant return (A) and the heating water circulation pump (6) back to the coolant pump (5).

By far the greater percentage of the coolant does not flow through the heat exchanger (2), but from the engine to the coolant thermostat (4). Depending on the water temperature, this conducts the water through the radiator (3) or directly to the coolant pump (5).