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Home >> Ford >> 2019 >> Edge ST >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - General Information (1 Of 2) >> Description And Operation >> Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) - System Operation and Component Description >> Component Description >> Ambient Air Temperature (AAT) Sensor

Ambient Air Temperature (AAT) Sensor

Ambient Air Temperature (AAT) sensor is an input to the PCM. If the temperature is below approximately 1 deg.C (33.8 deg.F), the PCM does not allow the A/C compressor clutch to engage.