Description
Heating Servo Motor For Citroën C4 II And Peugeot 308 T7
Used heating servo motor designed for Citroën C4 II and Peugeot 308 (T7) HVAC systems. This servo/actuator controls blend and air distribution flaps inside the heater box to regulate cabin temperature and airflow. It is a direct-fit replacement for technicians and DIYers who need a reliable repair part for common climate control failures. Searches for part numbers such as T1009914P or A 6479E7 typically lead to this unit, making it easy to find on parts lists or catalogs.
Key Features And Benefits
– Restores proper flap movement and accurate temperature mixing when original actuator is worn or seized.
– Direct mechanical and electrical fit for listed vehicle models; same connector and mounting points as original.
– Ideal for workshops and home mechanics who want a cost-effective alternative to replacing the complete HVAC module.
How The Part Works
The servo motor drives small plastic gears and a linkage that moves HVAC flaps (blend door, mode door or recirculation door depending on vehicle specification). The vehicle’s climate control unit sends positional commands; the servo converts electrical signals into controlled rotational movement to position the flaps precisely and modulate cabin temperature and airflow distribution.
Typical Symptoms Indicating Replacement Is Needed
- Incorrect cabin temperature or inability to change temperature smoothly.
- Unusual clicking, grinding or intermittent operation from behind the dash, especially when changing HVAC settings.
- Airflow stuck to one mode (e.g., only defrost or only feet vents) or poor distribution of air.
- Complete loss of function of a specific vent or blend function.
Why The Part Fails Most Often
Failure is commonly caused by worn internal plastic gears or gearbox bearings, fatigue of potentiometer or position sensor elements, moisture ingress, or debris in the heater box that jams the mechanism. Repeated forced movement (for example trying to move a frozen flap) accelerates gear wear and can strip teeth, producing the characteristic clicking sound. Heat cycles and age also degrade internal components over time.
Installation Recommendations
– Preparation: Park vehicle with ignition off and follow basic safety precautions. For general safety, isolate the electrical system according to manufacturer guidance before beginning work.
– Access: In most C4 II and 308 (T7) applications the servo is located in the HVAC unit behind the glovebox or lower dash on the passenger side. Remove glovebox and lower trim panels to reach the actuator housing.
– Replacement: Unplug the electrical connector, remove mounting screws, extract the old servo and transfer any mechanical linkages or splined fittings if necessary. Fit the new servo in the same orientation, secure with screws and reconnect the plug.
– Final Check: Test operation through the vehicle’s HVAC controls across full range (mode, temperature, recirculation) and listen for smooth, silent movement. If available, run a diagnostic HVAC actuator test or cycle the controls to confirm correct calibration.
Technical Information
- Manufacturer: Valeo
- Model: Citroën C4 II; Peugeot 308 (T7)
- Product Codes: T1009914P; A 6479E7
- Other Numbers: T1009914P, A 6479E7
Notes For Mechanics And DIYers
This is a used replacement servo intended for competent technicians and experienced DIY enthusiasts. Ensure gears and linkages on the replacement move freely before installation. If the HVAC system exhibits multiple faults (actuator plus flap damage or contaminated heater box), inspect and clean the box and flaps to prevent premature failure of the new unit. When reinstalling trim, avoid over-tightening fasteners that could deform the housing or bind the actuator linkage.
