S15/T15 Sonoma P/U 2WD V6-262 4.3L VIN W CPI (1994)
Air Conditioning Switch: Description and Operation
Temperature Valve Motor
The Temperature Valve Motor positions the Temperature Valve according to the Temperature setting of the Heater Controller. For the full Cold
temperature setting, the Temperature Valve Potentiometer returns about 4.0 volts to the Heater Controller. As the temperature setting is changed to full
HOT, the Temperature Valve is moved to the warm positions, and the potentiometer output rises to about 0.5 volts. For a temperature setting in the mid
range, the Temperature Valve is positioned to a point where the potentiometer output is the same as the preprogrammed value for the selected setting.
Should the Motor stall when changing Valve location, voltage is removed by the Heater and A/C Controller after 45 seconds to protect the Motor. This
sequence will be repeated each time there is a change in the Mode setting.
