Cabin Temperature Sensor / Switch: Description and Operation

IN-CAR TEMPERATURE SENSOR

In-Car Temperature Sensor:

The in-car temperature sensor measures the actual air temperature within the passenger compartment. The in-car temperature sensor is located inside of the A/C-heater control behind a vented panel and is not a separate serviceable component. The A/C-heater control must be replaced if there is a fault relating to the in-car temperature sensor.

Air from the passenger compartment flows over the thermistor of the in-car temperature sensor. The thermistor changes resistance with air temperature. The ATC A/C-heater control measures this resistance and calculates the temperature of the air. The A/C-heater control then makes adjustments to maintain the selected passenger compartment temperature.

The in-car temperature sensor cannot be adjusted or repaired, and if faulty or damaged, the A/C-heater control must be replaced.