Description
Product Overview
This BEHR Heater Servo (Heater Servo Motor) H1959 U B 44 (EAD512 / 6447RZ / 6447RF) is designed for PSA vehicles and is commonly used to control heater/air distribution flaps in the HVAC unit of Citroen C4 and Peugeot 307 II. It is aimed at professional mechanics and competent DIY installers searching by part number for a direct-fit servo actuator.
Function And Application
The servo motor operates the heater box flaps (blend/direction/recirculation flaps) to regulate airflow and cabin temperature. On affected PSA models it replaces the OEM actuator responsible for moving internal HVAC flaps according to the climate control commands.
Common Failure Modes And Service Notes
Typical causes of failure include worn or stripped internal plastic gears, seized motor bearings, electrical connector corrosion, or broken gear teeth from repetitive movement. Symptoms are unusual HVAC noises, stuck or incorrect airflow direction, inability to change temperature or mode, or error codes related to flap position. Lifespan varies with vehicle use and environment; warm/cold cycle frequency and dust ingress accelerate wear.
Replacement And Installation Guidance
Replacement usually requires access to the HVAC housing behind the dashboard or via the glovebox area depending on model. General steps: disconnect battery, remove dash trim or glovebox to reach the heater box, unplug electrical connector, remove mounting screws securing the actuator, swap the unit and refit screws and connector, then check flap movement and recalibrate if required by the vehicle’s climate control procedure. Suitable for experienced DIY technicians and workshop mechanics; consult vehicle-specific service manual for detailed removal and calibration steps.
Compatibility And Fitment
Fits PSA vehicles where the listed part numbers apply — commonly referenced for Citroen C4 and Peugeot 307 II. Always verify part numbers with the vehicle’s VIN or compare with the original actuator label to ensure exact compatibility before installation.
Technical Information
- Manufacturer: BEHR
- Model: Citroen C4; Peugeot 307 II
- Product Codes: H1959; EAD512; 6447RZ; 6447RF
- Additional Numbers: U B 44
Why Choose This Part
This servo motor listing includes common OEM and aftermarket reference numbers to help you find an exact match quickly. The description and codes are tailored for mechanics and DIY customers who search by part number (e.g. H1959, EAD512, 6447RZ). Replace a failing actuator to restore proper HVAC function and eliminate flap noise or incorrect air distribution.
