Description
Heater servo motor for Citroën C2, C3 and Peugeot 206 and 307.
This heater servo motor (HVAC actuator) is designed to restore precise control of airflow and temperature in the heating and ventilation box of compatible Citroën and Peugeot models. Ideal for professional workshops and experienced DIY mechanics, the unit replaces worn or failed actuators that cause incorrect flap position, no heating, or unusual noises from the dashboard. Common search terms include heater servo motor, HVAC actuator, blend door actuator, and the product codes 95494 / 6447QN — useful when locating the part by reference number.
Key Features
– Direct-fit actuator for climate control flaps and blend doors.
– Restores correct airflow distribution and temperature regulation.
– Compact electric motor with internal gear train adapted to the heater box design.
– Suitable for technicians and competent DIY installers looking for a reliable replacement part.
Technical Information
- Manufacturer: Buhler / BEHR
- Model: Compatible With Citroën C2; Citroën C3; Citroën C3 Pluriel; Peugeot 206; Peugeot 307
- Product Codes: 95494; 6447QN
- Other Numbers: Stellantis Group References (vehicle OEM group)
How It Works
The servo motor actuates the internal flaps inside the heater box to control the mix of hot and cold air and the direction of airflow (defrost, face vents, footwell). It receives control signals from the vehicle HVAC module and moves a small gearbox that positions the flaps. When functioning correctly, the actuator provides smooth, quiet movement and accurate positioning; when faulty, the system may show incorrect temperature output or make clicking/grinding noises.
Installation Recommendations
- Always Disconnect The Battery Before Starting Work To Avoid Short Circuits And Potential Damage To Electronic Components.
- Access The Actuator By Removing The Necessary Dashboard Or Center Console Panels To Reach The Heater Box According To The Vehicle Repair Manual.
- Unplug The Electrical Connector And Remove The Mounting Screws Or Clips Holding The Actuator In Place.
- Fit The New Unit In The Correct Orientation, Secure Fasteners And Reconnect The Electrical Connector.
- After Installation, Cycle The HVAC Controls Through All Modes To Allow The System To Self-Align; If The Vehicle Requires It, Perform An HVAC Adaptation Procedure With Diagnostic Equipment.
- Follow Manufacturer Procedures For Removal And Reinstallation To Prevent Damage To Fragile Plastic Clips And Flanges.
Why The Part Fails Most Often
- Wear Of Plastic Gears: Repeated Movement Over Years Causes Teeth To Degrade, Leading To Slippage Or Complete Failure.
- Motor Burnout Or Electrical Faults: Motor Windings Or Brushes Can Fail, Especially After Long Service Life Or Voltage Spikes.
- Water Ingress Or Condensation: Moisture Entering The Heater Box Can Corrode The Actuator Or Cause Short Circuits.
- Mechanical Obstruction Or Binding: Debris, Broken Flap Clips, Or Deformed Ducts Can Jam The Mechanism And Overload The Motor.
- Connector Corrosion Or Wiring Damage: Poor Electrical Contact Causes Intermittent Operation Or Complete Loss Of Function.
Notes For Professionals And DIY Mechanics
This actuator is recommended for technicians familiar with dashboard disassembly and HVAC systems on Peugeot and Citroën cars. Searching by part numbers 95494 or 6447QN increases the chance of finding the correct unit quickly. If uncertain about access or calibration, consult the vehicle repair manual or diagnostic procedures specific to the model.
