Description
Heater servo motor for CITROËN C4 and PEUGEOT 307 II vehicles
This used heater servo motor is designed for Citroën C4 and Peugeot 307 II climate systems and is a direct-fit replacement for worn or failed HVAC actuators. Ideal for professional workshops and experienced DIYers, the unit restores precise flap movement for temperature and airflow distribution. Common search keywords: heater servo motor, climate control actuator, blend door actuator, Citroën C4 heater motor, Peugeot 307 II servo motor, EAD512, H1959.
Function And Benefits
The servo motor operates the HVAC flaps inside the heater/air-conditioning box, controlling air distribution and temperature mixing (blend door). Replacing a faulty servo improves cabin comfort, stops incorrect temperature distribution, and eliminates unusual HVAC noises. Benefits include straightforward replacement, restored HVAC responsiveness, and compatibility with original mounting points and connectors.
Technical Information
- Manufacturer: Behr
- Model: Citroën C4, Peugeot 307 II
- Product Codes: H1959 U b 14, EAD512, 6447RF, 6447RZ
- Additional Numbers: Stellantis / Citroën / Peugeot references as listed above
Installation Recommendations
- Always disconnect the battery before starting work to avoid short circuits and protect vehicle electronics.
- Typical access is from the passenger footwell or under the glovebox—remove trim panels or glovebox as required to reach the HVAC housing.
- Disconnect the electrical connector, remove the fixing screws or clips, and extract the old actuator. Compare gearing orientation before fitting the replacement.
- Install the new servo in the same position, secure fasteners, reconnect the plug and reconnect the battery. Run the climate control through its modes to verify correct movement and absence of obstruction or unusual noise.
- Check for damaged vacuum lines or broken flap linkages while the HVAC box is accessible. Replace damaged clips/gears to prevent premature failure of the new servo.
Why This Part Fails Most Often
- Worn or stripped plastic gears inside the actuator due to age and repeated movement.
- Moisture ingress or contamination leading to corrosion and electrical failure.
- Overheating or mechanical blockage of flaps causing excessive load on the motor.
- Intermittent electrical contact at the connector or internal motor brushes wearing out.
Compatibility And Notes
Designed to fit Citroën C4 and Peugeot 307 II climate units. The part is commonly referenced by codes H1959 U b 14, EAD512, 6447RF and 6447RZ—customers searching by these numbers often find the correct replacement. Before final assembly, verify smooth flap travel and secure all clips to prevent rattle and future damage.
