Description
Heater servo motor for Citroën C4 and Peugeot 307 II. BEHR climate actuator gearmotor.
Description
This genuine-style BEHR blower/heater servo motor (actuator gearmotor) controls the HVAC flap movement in Citroën C4 and Peugeot 307 II vehicles. The unit drives blend and mode doors in the ventilation system to regulate airflow direction and cabin temperature. Designed as a direct replacement for failed or noisy factory actuators, it restores reliable flap travel and precise HVAC control.
Technical Information
- Manufacturer: BEHR
- Model: Citroën C4; Peugeot 307 II
- Product Codes: EAD512; 6447RZ; 6447RF; H1959 U b 44
- Additional Numbers: EAD512, 6447RZ (codes supplied by seller/vehicle records)
Fitment And Compatibility
Fits Citroën C4 and Peugeot 307 II HVAC systems where the listed product codes match. This actuator is commonly used on vehicles with BEHR/VALEO style climate modules; always confirm the code stamped on the old unit before installation.
Symptoms Of Faulty Unit
- No change in airflow direction when switching vents (windshield/face/feet).
- Inconsistent or incorrect cabin temperature despite HVAC controls being set correctly.
- Audible clicking, grinding, or intermittent motor noise from the dash area.
- Flaps stuck in one position or limited travel range.
Replacement Procedure
High-level replacement steps (typical for Citroën/Peugeot heater servos):
- Disconnect the negative battery terminal before starting work to avoid short circuits and protect vehicle electronics.
- Gain access to the actuator—this usually requires removal of the glovebox or lower dash trim panels depending on the model.
- Unplug the electrical connector and remove the retaining screws securing the actuator to the HVAC housing.
- Remove the old actuator, fit the new unit in the identical orientation and secure with screws.
- Reconnect the electrical connector and reassemble trim panels. Reconnect the battery and test all vent positions and temperature settings.
Many HVAC actuators are plug-and-play and perform an automatic calibration sequence on first power-up (moving to end stops). If the new actuator does not self-calibrate or behaves incorrectly, perform an HVAC adaptation procedure using PSA diagnostic equipment or an equivalent diagnostic tool.
Installation Recommendations
- Work In A Clean Area: Prevent dirt or debris entering the HVAC housing when the actuator is removed.
- Use Correct Tools: Typically small Torx or Phillips screws and trim removal tools are required.
- Avoid Forcing Gears: If the actuator does not install smoothly, check for obstruction or damaged flap linkage before applying extra force.
- Test Before Final Reassembly: Verify full operation of all vent modes and temperatures before re-fitting panels.
- If Uncertain, Have A Professional Complete The Job: Complex dashboards or additional diagnostics may be required on some vehicles.
Most Common Failure Causes
- Worn Plastic Gear Teeth: Repeated use and age can degrade the small plastic gears inside the actuator, causing slipping or grinding.
- Faulty Motor Or Potentiometer: Internal motor wear or a failed position sensor results in intermittent or lost control.
- Moisture And Corrosion: Condensation in the HVAC box can corrode contacts and gears.
- Foreign Objects Or Obstructions: Debris in the ductwork can jam the flap mechanism and overload the actuator.
- Heat And Ageing: Long-term exposure to heat cycles shortens component life, especially in older vehicles.
Notes
This description uses part numbers and vehicle models provided by the supplier. Always confirm compatibility by matching the part code on the old actuator with the codes listed above before purchase.
