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Home >> Ford >> 2011 >> Expedition 4WD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System >> Description And Operation >> Control Components >> Electronic Automatic Temperature Control (EATC) >> Ambient Air Temperature Sensor
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Ambient Air Temperature Sensor

The ambient air temperature sensor contains a thermistor, which measures the temperature of outside air as a resistance and sends that reading to the HVAC module.

The ambient temperature sensor is located on the upper radiator core support.