Description
Heater servo motor for Citroën C4 and Peugeot 307 II vehicles
This BEHR heater servo motor (heater actuator) is designed for Citroën C4 and Peugeot 307 II HVAC systems. It replaces faulty or noisy blend/air flap actuators and restores precise control of cabin temperature and airflow distribution. Commonly referenced under product codes such as EAD512, 6447RZ / 6447RF and H1959 U b 13, this unit is suitable for mechanics and DIY enthusiasts who need a reliable replacement part that fits Stellantis platforms used by Citroën and Peugeot.
Why Choose This Heater Servo Motor
High-Quality Construction: Produced by BEHR, a recognised supplier of thermal management components, the actuator offers consistent movement and accurate positioning of HVAC flaps. Fast Identification: Frequently searched by part numbers (EAD512, 6447RZ, 6447RF, H1959), making it easy to find the correct part for repairs.Designed For Repair Professionals And DIYers: Clear fitment for Citroën C4 and Peugeot 307 II models and a straightforward replacement process make this part suitable for garage technicians and experienced home mechanics.
Function And Typical Faults
The heater servo motor controls the position of the blend or air distribution flaps inside the heater/air conditioning unit, enabling temperature regulation and directing airflow to windscreen, face vents, or footwell. Typical failure modes include worn or stripped plastic gear teeth, motor winding wear, internal bearing seizure, or intermittent electrical connection. Symptoms of a failing actuator are clicking noises behind the dash, incorrect temperature, non-responsive vent position changes, or constant motor running.
Replacement Procedure (Overview)
- Locate Unit: Usually mounted on the heater box behind the glovebox or lower dashboard on Citroën C4 and Peugeot 307 II.
- Access: Remove glovebox or lower trim panels to reach the actuator—keep fasteners organised.
- Disconnect: Unplug the electrical connector and remove securing screws or clips.
- Swap: Fit the new actuator, secure with original fasteners, and reconnect the wiring.
- Test: Power up the HVAC system and cycle through modes to confirm correct flap movement and absence of abnormal noises.
Installation Recommendations
- Work Safely: Disconnect the battery before starting work to avoid short circuits and accidental airbag deployment where applicable.
- Compare Parts: Always compare the new unit with the removed actuator to confirm matching connector and mounting points.
- Gentle Handling: Avoid forcing plastic gears; align the actuator spline carefully when fitting.
- Calibration: After installation, cycle the HVAC through full range to allow the actuator to self-position; follow vehicle manufacturer procedures if specific calibration steps are required.
- Use Appropriate Tools: Use correct screwdrivers and torque settings to avoid damage to plastic housings and mounting points.
Technical Information
- Manufacturer: BEHR
- Model: Citroën C4; Peugeot 307 II
- Product Codes: EAD512; H1959 U b 13
- Other Numbers: 6447RZ; 6447RF
Reason This Part Most Commonly Fails
Most failures are caused by mechanical wear of internal plastic gears and linkages, exposure to moisture or debris that leads to seized bearings, or electrical motor wear after many years of operation. Repeated stall conditions (blocked flaps or excessive resistance) can overheat and damage the motor. Regular inspection of HVAC components and prompt replacement of noisy or intermittent actuators help prevent secondary damage to the heater box mechanisms.
Note: This listing is intended to help identify and replace the heater servo motor on compatible Citroën C4 and Peugeot 307 II models. Many customers search using the codes shown above (EAD512, 6447RZ / 6447RF, H1959 U b 13), so verify fitment visually before installation.
