Lower or Floor

When the driver selects the LOWER mode, the blower motor turns ON. The driver may manually adjust the blower speed. The driver may activate the A/C compressor by pressing the A/C button. It the outside temperature is above 7.2°-10°C (45°-50°F), the A/C operates in order to maintain the evaporator core at about 1°C (33°F).

The vacuum actuators move to the following positions:
^ The heater and A/C programmer applies vacuum to one side of the heater-A/C bi-level valve.
^ The air-inlet valve vents in the outside air position.
^ The defrost-A/C valve vents in the defrost position.
^ The heater-A/C-bi-level valve vents in the heater position.

The blower pulls outside air into the system. The air is heated or cooled. The air is then forced through the floor outlets.

The heater and A/C programmer energizes the air mix actuator in order to perform the following functions:
1. Determine the proper air discharge temperatures
2. Position the air mix valves accordingly