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All Models

All Ford models use a mechanical sensor device. The sensor assembly, located behind the right side of the instrument panel, samples inferior air. The assembly contains a bimetallic disc which reacts to the air temperature sensed, causing a vacuum signal reaction. The temperature control lever is attached by a cable to an arm in the sensor. By adjusting the lever, the vacuum bias is created. Thus, modulated vacuum output is a result of the temperature lever bias and the air temperature sensed at the bi-metal disc.

Fig 1: Sectional View of ATC Sensor Assembly
G09361080Courtesy of FORD MOTOR CO.