Evaporator Discharge Air Temperature Sensor

The PCM (12A696) determines A/C compressor clutch cycling based on input from the evaporator air discharge temperature sensor (19C734). The evaporator air discharge temperature sensor:

• maintains evaporator core temperature, and prevents icing of the evaporator core (19860) by disengaging the A/C compressor (19703) when the evaporator discharge air temperature falls below a preset level, and engaging the A/C compressor when evaporator discharge air temperature rises above a preset level. For information regarding operating temperature specifications, refer to REFRIGERANT SYSTEM TESTS .
• contains a thermistor which receives a reference voltage from the PCM. The thermistor then varies the resistance to the reference voltage based on the evaporator discharge air temperature, and returns the resulting voltage to the PCM. The PCM determines evaporator air discharge temperature based on the return voltage value.
• is located in the heater core and evaporator core housing just downstream of the evaporator airflow.