Description
Overview
The BEHR Heater Servo Motor (heater actuator) is designed for Citroën C5 (X7) and compatible PSA vehicles. It controls the HVAC airflow doors that direct heating, ventilation and recirculation. This unit is commonly referenced by product codes EAD516, P1975001 and identification numbers U b 42 and 647949.
Function and Symptoms
The actuator moves blend, vent and recirculation flaps to regulate cabin temperature and airflow distribution. Typical failure symptoms include uneven or incorrect cabin temperature, stuck vents, clicking or grinding noises from behind the dashboard, and HVAC-related error messages on diagnostic tools. These signs help distinguish actuator problems from issues with the heater core or blower motor.
Replacement and Fitment
Replacement is straightforward for experienced mechanics: access the actuator via the glovebox or lower dash panel, disconnect the electrical connector, remove the securing screws or clips, and swap the unit ensuring correct spline alignment. Some vehicles require a simple calibration routine after installation (ignition cycles or HVAC control calibration). Always verify the product codes against your vehicle before fitting.
Durability and Causes Of Failure
Heater servo motors are wear items. Common causes of failure include plastic gear wear or breakage, contamination from debris or moisture, and connector or wiring faults. Lifespan varies with usage and climate; inspecting the HVAC door movement and wiring during replacement reduces the chance of repeat failures.
Technical Information
- Manufacturer: BEHR
- Model: Citroën C5 (X7)
- Product Codes: EAD516, P1975001, U b 42, 647949
- Additional Numbers: PSA, Citroën, Peugeot
Notes For Buyers
Use the listed product codes to confirm compatibility with your vehicle. If you are unsure, consult a parts specialist or check OEM cross-reference information. This part is suitable for professional workshops and competent DIYers comfortable with dashboard access and basic HVAC procedures.
