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Home >> Ford >> 2017 >> F-150 Limited, 4WD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - General Information - Specifications, Description And Operation >> Description And Operation >> Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) - System Operation and Component Description >> System Operation >> Cabin Heater Coolant Pump
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Cabin Heater Coolant Pump

Vehicles equipped with the 2.7L EcoBoost engine or the 3.5L EcoBoost engine have the auto start-stop feature as standard equipment, which includes a cabin heater coolant pump. The cabin heater coolant pump provides coolant to the heater core whenever the HVAC system requests heat and the vehicle is in auto start-stop mode. The PCM sends a PWM signal to control the cabin heater coolant pump. Refer to the Owner's Literature, Unique Driving Characteristics for full auto start-stop enabling/disabling information.

The PCM sends a PWM signal to the cabin heater coolant pump based upon the:

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