Description
Overview
High-quality Heater Servo Motor designed for PSA vehicles, branded Valeo and HELLA. This HVAC actuator restores precise control of hot/cold air distribution by operating the internal heater/ventilation flaps. Commonly searched by product number (664458E, 6447NR, N100463X), this unit is aimed at professional mechanics and competent DIY enthusiasts looking for a reliable replacement for Citroen and Peugeot models.
Features & Benefits
- Direct-fit replacement for PSA HVAC systems, reducing installation time.
- Restores accurate flap position control for consistent cabin temperature.
- Compatible with common Citroen C2 and C3 applications and other PSA vehicles where the listed part numbers apply.
- Designed to meet OEM form, fit and function expectations for straightforward integration.
Fitment & Compatibility
Fits Citroen and Peugeot PSA models using the heater servo motor with part references 664458E, 6447NR or N100463X. Most commonly fitted to Citroen C2 and Citroen C3; may also suit related PSA vehicles. Always verify by cross-referencing the vehicle OEM number or existing part number before ordering. This part is frequently located inside the HVAC box behind the dashboard and is often searched by its product code.
Installation Guidance
Typical replacement requires basic workshop tools and some dashboard trim removal. Recommended general steps:
- Disconnect the negative battery terminal to avoid electrical shorts.
- Remove necessary trim panels or glovebox to access the HVAC housing (location varies by model).
- Unplug the electrical connector and detach any control linkages or clips from the old servo motor.
- Unclip or unscrew the servo motor from the HVAC box, fit the replacement unit, and reconnect linkages and the electrical connector.
- Reassemble trim, reconnect the battery, and cycle the HVAC controls to confirm correct operation of flaps and actuator movement.
Common Failure Modes And Maintenance
Heater servo motors commonly fail due to worn plastic gears, stripped teeth, internal motor wear, or moisture and dirt ingress. Symptoms include stuck or noisy flaps, inability to change airflow direction or temperature mixing, and intermittent operation. Regularly check connectors and fuses, avoid excessive moisture in the HVAC box, and replace the actuator when flap movement becomes erratic to prevent further HVAC system issues.
Technical Information
Manufacturer: Valeo, HELLA
Model: Heater Servo Motor (HVAC Actuator) For PSA Vehicles (Citroen, Peugeot)
Product Codes: 664458E, 6447NR, N100463X
Other Numbers: Please Cross-Reference With Vehicle OEM Part Numbers
If you are a mechanic or performing a DIY repair, confirm fitment by matching the existing part number before purchase. Proper diagnosis of HVAC flap or actuator faults will ensure the correct replacement and restore full control of cabin heating and ventilation.
