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Home >> Ford >> 2015 >> Fiesta ST >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - General Information >> Description And Operation >> Climate Control System - Vehicles With: Electronic Automatic Temperature Control (EATC) - System Operation and Component Description >> Control System Logic >> Compressor Clutch
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Compressor Clutch

When A/C is requested and all conditions are within normal parameters, a ground is provided to the A/C clutch relay coil from the PCM, energizing the A/C clutch relay. When the PCM energizes the relay, voltage is supplied to the A/C compressor clutch field coil from the relay.

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