Description
Heating servo motor for Citroën C2, C3 and Peugeot 206 and 307
This replacement heating servo motor (actuator) is designed for climate control systems in Citroën and Peugeot small cars. It restores precise control of ventilation flaps and temperature mixing doors, eliminating issues such as incorrect cabin temperature, stuck flaps or unusual noises. Ideal for professional mechanics and DIY enthusiasts who frequently search by part number for quick identification and ordering.
Technical Information
- Manufacturer: Buhler / BEHR
- Model: Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 206, Peugeot 307
- Product Codes: 95494, 6447QN
- Additional Numbers: Stellantis Citroën Peugeot references (as marked)
Function And Symptoms
The servo motor drives the internal heater/air distribution flaps inside the HVAC box. When working correctly it positions blend doors to regulate airflow direction and temperature. Typical symptoms of a failing unit include grinding or clicking noises from the dashboard, inability to select different airflow modes, erratic cabin temperature, or a permanently hot/cold blower output despite control input.
Replacement Procedure (Overview)
- Disconnect the negative battery terminal before starting to prevent electrical shorts.
- Gain access to the HVAC housing — this commonly requires removal of lower dashboard panels or the glovebox depending on the model.
- Locate the servo motor on the heater box, unplug the electrical connector and remove the fixing screws.
- Compare the new unit with the old one to confirm matching shaft orientation and connector type, then install the new servo and secure screws.
- Reconnect the electrical plug, reconnect the battery, and cycle the HVAC controls to verify correct movement before reassembling trim panels.
Installation Recommendations
- Test the new servo motor before final reassembly to avoid repeat disassembly.
- Ensure connectors and wiring are dry and free of corrosion; apply a light dielectric grease to terminals if appropriate.
- Do not overtighten mounting screws — plastic housings and gearboxes can crack.
- If flap movement is noisy or sticky after fitment, inspect internal gears and linkages for damage or debris; replace damaged components to prevent premature failure of the new servo.
- For accurate operation, cycle the HVAC through its full range to allow the actuator to calibrate its travel.
Main Causes Of Failure
Failure is most often caused by worn plastic gears inside the actuator, stripped teeth, or motor burnout after long service. Water ingress or condensation in the HVAC box can accelerate deterioration. Mechanical resistance from broken or misaligned flaps places extra load on the servo and shortens its life. Regular exposure to heat cycles and dust over many years is the usual lifespan-limiting factor.
This servo motor is commonly searched for by part numbers 95494 and 6447QN — use these codes to quickly locate the correct replacement for Citroën C2/C3 and Peugeot 206/307 models.
