Description
Heater servo motor for Citroën C4 and Peugeot 307 II vehicles.
Replace a worn or malfunctioning HVAC actuator with this Behr heater servo motor designed for Citroën C4 and Peugeot 307 II applications. Built to restore precise control of temperature and airflow direction, this actuator is a practical choice for professional workshops and DIY mechanics who need a reliable, direct-fit replacement. The unit matches common part cross-references (H1959, EAD512, 6447RF/6447RZ) and is suitable where the original actuator has failed to move blend or distribution flaps, is noisy, or reports incorrect temperature control.
Technical Information
- Manufacturer: BEHR
- Model: Citroën C4; Peugeot 307 II
- Product Codes: H1959, EAD512
- Other Numbers: 6447RF, 6447RZ, U b 13
Compatibility
Intended For: Citroën C4 and Peugeot 307 II models (Stellantis group). Always check the part number used on the original actuator to confirm match with the vehicle fitment list.
Function And Benefits
The heater servo motor (actuator) drives the internal HVAC flaps that regulate temperature blend and airflow distribution. A correctly functioning actuator provides:
- Accurate cabin temperature control
- Quiet and smooth flap movement
- Reliable repeatability during climate mode changes
How The Part Is Replaced (Basic Guide)
Typical replacement procedure for passenger-compartment HVAC actuators (general guidance for experienced mechanics):
- Disconnect the vehicle battery before starting work.
- Access the actuator from the passenger side—often behind or below the glovebox. Remove trim or the glovebox as required.
- Locate and unplug the electrical connector, then remove the mounting screws securing the actuator to the heater box.
- Compare the new unit with the old one for matching splines and connector orientation, install the replacement, refit screws and connector.
- Reconnect the battery and run the climate control through its modes to verify correct movement and calibration. If required, cycle the system to allow the actuator to find end stops.
Installation Recommendations
- Work Should Be Performed By Someone With Basic HVAC/Dashboard Experience: Removing trim and accessing the heater box requires care to avoid damage to clips and surrounding components.
- Always Disconnect The Battery Before Removal To Reduce Risk Of Electrical Damage.
- Inspect Surrounding Gears And Linkages For Damage Or Debris And Clean The Area Before Installing The New Actuator.
- After Installation, Verify Full Range Of Motion At Different Climate Settings And Listen For Unusual Noises.
Why This Part Most Often Fails
- Plastic Gear Wear Or Stripping: Repeated cycling over years commonly causes teeth to wear or strip, producing loss of movement or rattling noises.
- Motor Burnout: Internal motor windings can fail after long service life or excessive load.
- Electrical Connector Corrosion Or Wiring Faults: Moisture ingress or connector damage can interrupt power or signals.
- Debris Or Mechanical Obstruction In HVAC Box: Foreign objects can jam flaps and overload the actuator.
- Thermal And Ageing Effects: Heat cycles and long-term exposure reduce plastic and electronic component lifespan.
For technicians: replacing the actuator and checking the HVAC system for proper operation typically resolves temperature control and flap movement issues. This unit is aimed at restoring reliable climate control performance in affected Citroën C4 and Peugeot 307 II vehicles.
