Description
Product Overview
A Valeo heater servo motor (also referred to as an HVAC blend/air distribution actuator) for PSA vehicles. This used servo motor, part numbers F663746X.C and 6447NL, is a direct-fit replacement commonly found on Citroën C2, Citroën C3 and Peugeot 1007 models. It restores proper control of temperature blend and airflow distribution in the cabin to ensure consistent heating performance.
Function And Symptoms Of Failure
The heater servo motor operates the blend door or distribution flaps inside the HVAC box. It controls the mix of hot and cold air and directs airflow to vents, footwell or windshield. Typical symptoms of a failing unit include uneven or no cabin heating, inability to change temperature or airflow direction, abnormal clicking or grinding noises from the dashboard, and error codes related to HVAC operation on some diagnostics.
Common Causes And Lifespan
Failures are most often caused by worn internal gears or plastic gear teeth, broken mounting tabs, electrical connector problems, or worn potentiometer/position sensor elements. Accumulated dust, high humidity and frequent full-range cycling can shorten service life. Under normal use many of these actuators last several years, but occasional replacement is a common maintenance item on higher-mileage PSA cars.
Replacement And Installation Notes
Replacement usually requires access behind the dashboard or removal of the glovebox depending on model. Typical steps: disconnect the vehicle battery, remove trim or glovebox to access the HVAC housing, unplug the electrical connector, remove retaining screws and replace the servo motor, then reassemble and test operation. For an experienced mechanic the job often takes about 30–60 minutes; for a DIYer allow additional time and follow a vehicle-specific guide. Always verify correct actuator rotation and full-range movement after installation.
Fitment And Compatibility
This used Valeo servo motor is identified by product codes F663746X.C and 6447NL and is listed for Citroën C2, Citroën C3 and Peugeot 1007 models. Many technicians and DIYers search by these part numbers to ensure correct fitment. Because manufacturers sometimes use the same actuator across several PSA models, we recommend checking your vehicle’s OEM part number or consulting a parts compatibility list before ordering.
Technical Information
- Manufacturer: Valeo
- Model: Citroën C2, Citroën C3, Peugeot 1007
- Product Codes: F663746X.C, 6447NL
- Other Numbers: May fit other PSA models – verify compatibility by OEM numbers
Condition: Used. This unit is supplied as a quality used component suitable for restoring HVAC function in compatible PSA vehicles. Check fitment by the listed product codes and consult vehicle-specific repair instructions for removal and installation details.
