Air Mix Valve Linkage
The air mix valve linkage consists of a plastic crank arm which works
with the following components:
• | The output shaft of the actuator |
One end of the rod is fastened to the air mix valve. The opposite end
is retained by the nylon retainer.
The heater and A/C programmer uses the actuators in order to drive the
air mix valves.
Air Mix Valve Position
The proper air mix valve position is determined by the heater and A/C
programmer. In order to provide the proper mix of warm and cool air, the
heater and A/C programmer monitors the following variables:
• | The coolant temperature |
• | The ambient air temperature |
• | The inside air temperature |
• | The engine revolutions per minute (RPM) |
• | The low side temperature |
The heater and A/C programmer position the air mix valve for the appropriate
blend of air through the evaporator core and the heater core, depending
upon the current program number.