Air Distribution

Air is directed into the air distributor assembly (9) through an up/down valve (7). The air is then directed to the following outlets:
^ The heater outlets
^ The instrument outlets
^ The defroster outlets

A vacuum actuator operates the 3-position up/down valve (7). In the middle position, the valve allows the air to flow to the heater outlets and up through the instrument panel or defroster outlets.

When the vacuum is supplied, the valve is pulled downward (6). This allows the air to flow upward through the air distributor to the instrument panel or defroster outlets.

When the valve is pulled upward (8), the air flows through the heater outlets (4). In all 3 positions, a small amount of the air is directed to the following locations:
^ The side window defroster outlets
^ The rear seat outlets

The A/C defroster valve directs the air through the instrument panel or defroster outlets.

A vented valve blocks the airflow to the A/C outlets and directs the air to the windshield. With vacuum supplied, the valve moves forward to the actuator, directing the air to the A/C outlets.