Duovalve, function - GF83.20-P-2100-01M

Function 

The duovalves for the rear air conditioning are controlled directly by the rear air conditioning pushbutton control module and control the coolant flow through the rear heater core separately for the left and right side.

The closing and opening times of the duovalves per cycle depend on the temperature setting.

Control principle 

The electro-magnetic coils in the duovalves are controlled digitally by the rear air conditioning pushbutton control module. This allows the hot water quantity flowing through the rear heater core to be controlled separately for the left and right side.

The duovalves are open when not under power.

Control of duovalves by rear air conditioning A/C pushbutton control module