Air Door Position Sensor / Switch: Description and Operation

Recirculation Valve

Recirculation valve 38, which controls the recirculation damper, will be switched on when recirculation switch 143 is depressed. The switch is supplied from fuse 6. When the switch is depressed, the lamp built into the switch will light up with full intensity.

The recirculation valve is also connected across main switch 149, when the air distribution control is in position 0 or < - > (regardless of the position of switch 143). The supply is taken from fuse 9, via ventilation fan resistor 74.