Description
High-quality BEHR heater servo motor designed as a direct-fit HVAC actuator for selected Citroën and Peugeot PSA models. This servo restores accurate control of heater and ventilation flaps so the climate system can regulate cabin temperature and airflow reliably. The unit is targeted at professional workshops and skilled DIY mechanics who frequently search for parts by product code.
Function and Benefits
The heater servo is a small electric motor with an internal gearbox and position feedback that drives blend or mode doors inside the HVAC housing. Correct operation ensures consistent hot/cold mixing and proper air distribution to vents, demist and footwells. Replacing a faulty actuator eliminates erratic temperature behavior, unusual clicking noises from the dash and incorrect airflow direction.
Compatibility
Common fitment: Citroën C4 and Peugeot 307 II (PSA platform). This part is associated with the product codes listed below; it may also fit other PSA vehicles that use the same actuator. Always verify compatibility against the vehicle VIN and existing part number before purchase.
Replacement Notes (How It Is Replaced)
Typical replacement requires disconnecting the vehicle battery for safety, gaining access to the HVAC housing (often behind the glovebox or lower dashboard on many PSA models), unplugging the electrical connector, removing the actuator retaining screws, and fitting the new unit. After installation, cycle the climate controls and check for correct flap movement. Job time can vary from about 30 minutes to 1.5 hours depending on model and experience. Basic tools: screwdrivers, trim removal tools and common sockets or Torx bits.
Common Failure Modes and Service Life
Failures typically result from worn plastic gears, motor winding fatigue, connector corrosion or water ingress. Symptoms include repeated clicking, loss of temperature control or fixed airflow direction. Service life depends on usage and environment but failures commonly appear after several years of service. Regular inspection of HVAC airflow and prompt attention to clicking noises help avoid prolonged cabin comfort issues.
Technical Information
- Manufacturer: BEHR
- Model: Heater Servo / HVAC Actuator
- Product Codes: EAD512, H1959 U b 41, H1959 Ub 41, 6447RZ, 6447RF
- Additional Numbers: PSA OEM cross-references may apply — always confirm against vehicle VIN
If you are unsure about fitment, match the product codes shown on the old part or consult vehicle-specific parts lists. For professional repairs, verify electrical connectors and flap movement after fitting to ensure reliable HVAC operation.
