Description
Heater Servo Motor BEHR Citroën C5 X7 and Peugeot 407
This BEHR heater servo motor (heater actuator) is designed for Citroën C5 X7 and Peugeot 407 climate systems. It controls the position of the HVAC blend/air distribution flaps to regulate cabin temperature and air flow. Intended for professional garages and DIY mechanics, this direct-fit electric actuator restores precise flap movement when the original unit shows erratic behaviour, noise, or loss of function. Many customers search by product code, so the numbers listed below are commonly used to identify the correct replacement part.
Technical information
- Manufacturer: BEHR
- Model: Citroën C5 X7; Peugeot 407
- Product Codes: EAD516; P1975001 U; 42647949
- Other Numbers: Stellantis CITROEN PEUGEOT references as shown
Function And Symptoms
The servo motor drives the HVAC flaps for temperature blending and air distribution. When it fails, common symptoms include intermittent or no temperature change, stuck airflow direction (e.g. only defrost or only feet), audible clicking or grinding from behind the dashboard, and fault messages or unusual behaviour of the climate controls. In many cases the motor still runs but the internal gears or position sensor no longer move or report correctly.
Installation Recommendations
- Prepare: Park on level ground, set the ignition to off and remove the negative battery terminal if required by your workshop procedures.
- Access: Most units are located behind the glovebox or under the dash on the passenger side. Remove trim and the glovebox to gain access.
- Replacement: Unplug the electrical connector, remove the retaining screws, swap the unit and reattach the connector. Avoid forcing plastic gears or linkages.
- Calibration: After installation, cycle the ignition and operate the climate controls through their full range to allow the actuator to find end stops. Some vehicles may perform an automatic HVAC calibration; consult vehicle service data for any specific reset procedure.
- Check: Verify full range movement and absence of noise before reassembling trim. Inspect adjacent flap mechanisms and linkages for damage.
Why The Part Fails Most Often
Failures usually stem from worn plastic gears, broken teeth, or internal potentiometer/electronic faults caused by age, repeated thermal cycles and humidity. Debris in the HVAC box, excessive force on the flaps, or water ingress from blocked drains can accelerate wear. Electrical issues such as connector corrosion or intermittent supply can also produce failure symptoms that mimic a bad actuator.
Choosing a correct-fit actuator with matching product codes (EAD516, P1975001 U, 42647949) ensures straightforward replacement and reliable HVAC operation on Citroën C5 X7 and Peugeot 407 models. Suitable for professional replacement or competent DIY repair when following safe workshop practices.
