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Air-mixing

Air-mixing


The control of the mixed-air temperature is achieved via a control wire connected to the air-mixing dampers. Cars equipped with ACC have a stepping motor that controls the air-mixing dampers.

The air temperature from the heater box is affected by the fan speed as well as the position of the air-mixing dampers. For certain markets, the coolant flow through the heater box can be completely closed off through a vacuum- operated coolant shut-off valve in order to achieve maximum cooling effect (applies to cars with A/C). This solenoid valve is activated when the climate control system is to provide maximum cold.

Depending on the desired heat/temperature position, the air-mixing dampers direct a certain amount of the incoming air through the heater box.

If the "cold air" position has been selected, the air-mixing dampers are closed and the air is prevented from reaching the heater box.