High-quality replacement heating servo motor (blend door actuator) designed for Citroën and Peugeot vehicles with mechanical/manual climate control. This unit from Magneti Marelli restores precise control of airflow and temperature mix in HVAC systems, eliminating common symptoms such as stuck flaps, incorrect cabin temperature and grinding noises. Frequently searched under part numbers A21900100 and 6447KF, this servo is a practical choice for professional workshops and DIY car owners who need a reliable, direct-fit solution for affected Stellantis Group models.

Technical Information

• Manufacturer: Magneti Marelli
• Model: Citroën, Peugeot (e.g., Peugeot 307 II)
• Product Codes: A21900100, 6447KF
• Other Numbers: NFP

Function

The servo motor drives the HVAC blend/air distribution flaps in vehicles with manual climate control. It converts electrical pulses into mechanical movement to position heater/ventilation flaps, regulating air flow path and cabin temperature. Smooth and accurate flap movement is essential for passenger comfort and proper operation of the heating system.

Fitment And Replacement

Replacement is typically performed from under the dashboard or from the glovebox area depending on the vehicle model. General steps: disconnect battery, remove the necessary trim or glovebox to access the HVAC housing, unplug the electrical connector, remove the fasteners securing the servo, replace the unit and reassemble. After installation, verify correct flap movement across all control settings and listen for abnormal noise. Use caution with fragile plastic gears and linkages when fitting the new servo.

Why The Part Fails

Common failure modes include worn or broken plastic gears, motor burnout from overload or age, and contamination or moisture ingress that impedes movement. Symptoms of a failing servo are audible grinding or clicking, intermittent or no flap movement, and inability to change cabin temperature distribution. Failures are more common on higher-mileage cars and in environments with prolonged humidity exposure.

Installation Recommendations

• Disconnect The Battery Before Any Work And Follow Manufacturer Procedures To Avoid Damage.
• Handle Plastic Gears And Linkages Carefully To Prevent Breakage.
• Test The Unit Before Reassembling Trim Panels: Cycle The HVAC Controls Through All Positions.
• If Fitment Requires Access Behind The Dashboard, Use Proper Tools And Work Lighting; Consider Workshop Assistance If Access Is Difficult.

Order By Part Number A21900100 Or 6447KF For Faster Identification. Suitable For Mechanics And Experienced DIYers Working On Citroën And Peugeot Vehicles With Manual Climate Control.

This BEHR heater servo motor (HVAC actuator) is designed to control the heating/ventilation flap movement in the climate box of Citroën C4 and Peugeot 307 II models. A direct-fit replacement for worn or noisy actuators, it restores precise control of airflow direction and blend temperature. The unit is suitable for professional workshops and experienced DIY mechanics who maintain Stellantis vehicles and often search by part number (e.g. 6447RF, 6447RZ, H1959).

Key Features

• Direct replacement for original HVAC flap actuators on Citroën C4 and Peugeot 307 II.
• Controls blend/mode/recirculation flaps depending on vehicle configuration.
• Improves climate control responsiveness and removes clicking or grinding noises from the dashboard area.
• Supplied with electrical connector compatible with the original harness (check product codes for exact fit).

Replacement Procedure

Typical replacement is straightforward for trained mechanics and competent DIYers with basic tools. General steps:

• Disconnect the negative battery terminal before starting work.
• Gain access to the actuator location (commonly behind the glovebox or lower dashboard panel depending on model).
• Remove necessary trim panels and the glovebox to expose the HVAC housing.
• Unplug the electrical connector and remove mounting screws securing the actuator to the heater box.
• Fit the new actuator in the correct orientation, secure with screws, reconnect the electrical connector and reassemble trim.
• Reconnect the battery and cycle the ignition/AC controls to confirm correct operation and allow any automatic flap calibration sequence.

Installation Recommendations

• Always disconnect the battery before disassembly to avoid short circuits and protect vehicle electronics.
• Keep the work area clean to prevent debris entering the HVAC housing; replace the cabin filter if contaminated.
• Handle the actuator gears gently; plastic gear teeth can be brittle after long service life.
• After installation, verify full range of movement for the controlled flaps and check for unusual noises or binding.
• If the actuator is part of a multi-motor HVAC system, ensure other actuators operate correctly to avoid incorrect feedback during calibration.

Common Failure Causes

• Plastic Gear Wear: Repeated movement and age cause teeth to wear or strip, producing clicking or grinding sounds and loss of position control.
• Motor Burnout: Internal DC motor or gearbox failure from prolonged use or electrical faults.
• Water Ingress and Corrosion: Leaks or high humidity can corrode connectors and internal components.
• Obstruction and Debris: Foreign objects or degraded insulation/cabin filter fragments can jam flaps and overload the actuator.
• Connector/Cable Issues: Poor electrical contact or broken wires lead to intermittent operation.

Typical Lifespan

Service life depends on usage, climate and maintenance. Actuators commonly begin to fail after several years of service—many vehicles experience issues in the 8–12 year range or after high mileages—though this varies by usage and environment.

How Failures Manifest

• Clicking or grinding noises from the dashboard area when changing temperature or air distribution.
• Inability to change temperature accurately or to direct airflow to selected vents.
• Stuck flaps or limited range of movement causing inconsistent heating/cooling performance.
• Possible HVAC fault codes or warning messages on some dashboards.

Technical Information

• Manufacturer: BEHR
• Model: Citroën C4; Peugeot 307 II
• Product Codes: 6447RF, 6447RZ, H1959, U b 14
• Additional Numbers: EAD512

Compatibility Notes

This actuator is commonly referenced by the part numbers shown above and fits HVAC systems used on Citroën C4 and Peugeot 307 II variants. Always confirm the part number match against the unit being replaced before installation.

The BEHR Heater Servo Motor with Gasket is designed specifically for maintaining optimal climate control in Citroën and Peugeot vehicles. It fits models such as the Citroën C4 and Peugeot 307 II. This servo motor is equipped with product code EAD512 and includes a plastic intermediate piece ensuring a precise fit.

Function and Importance

This heater servo motor controls the blend door inside the HVAC (Heating, Ventilation, and Air Conditioning) system. It regulates the flow of hot air from the heater core into the vehicle cabin, enabling accurate temperature adjustments. Over time, these servo motors may fail due to mechanical wear or electrical issues, leading to inconsistent heating or failure to adjust the cabin temperature properly.

Replacement and Maintenance

Replacing the servo motor is typically straightforward and can be done by experienced DIY mechanics or professional technicians. The unit is mounted inside the dashboard, connected to the HVAC control system. Proper diagnosis should confirm servo motor failure before replacement. Regular inspection is advised if heating malfunctions occur, especially in vehicles frequently used in colder climates.

Technical Information

• Manufacturer: BEHR
• Models: Citroën C4, Peugeot 307 II
• Product Codes: EAD512, 6447RF
• Additional Codes: H1959 Ub 21, B5783 Ua 42

Why Choose This Product?

This genuine BEHR servo motor offers reliable performance and precise operation essential for maintaining a comfortable cabin environment. With its durable construction and plastic intermediate piece, it provides easy installation and long-lasting function, ensuring your Citroën or Peugeot’s heating system operates efficiently.

This Heater Servo Motor BEHR EAD511 H1961 Ua 12 is designed specifically for Citroën and Peugeot vehicles, including popular models such as the Citroën C4 and Peugeot 307 II. This component plays a crucial role in managing the airflow within the car’s heating, ventilation, and air conditioning (HVAC) system, enabling precise temperature control and ensuring passenger comfort.

Located inside the HVAC unit, the servo motor drives the actuator that adjusts the position of the heater flap. Over time, this motor can wear out due to continuous operation, dust, or mechanical obstruction, leading to irregular heating performance or failure to switch airflow correctly. Regular inspection and replacement are advised if you notice inconsistent climate control or error codes related to HVAC system malfunction.

Replacing the servo motor involves removing the dashboard panel to access the HVAC unit. Once removed, the old motor is disconnected and replaced with this BEHR EAD511 unit, restoring full functionality to the heating system. This part is essential for both professional mechanics and DIY enthusiasts aiming to maintain or repair their PSA Group vehicles’ climate control systems.

Technical Information

• Manufacturer: BEHR
• Model: Citroën C4, Peugeot 307 II
• Product Codes: EAD511, H1961 Ua 12
• Additional Numbers: 146447VA

Ensure compatibility by verifying product codes before purchase. This genuine-quality servo motor ensures optimal heater flap movement for accurate temperature regulation, contributing to your vehicle’s overall driving comfort and safety.

Searching for a reliable, high-quality car part for your Citroën or Peugeot vehicle? The BEHR EAD511 B8036 U14 heating servo motor is an ideal choice for owners of Citroën C4 and Peugeot 307 II models. This used part guarantees excellent functionality and durability due to thorough pre-sale inspection.

The heating servo motor plays a vital role in regulating the interior temperature of your vehicle, especially important during cold winter months. Designed to provide a comfortable and pleasant driving environment, this component is essential for the proper operation of your car’s heating system.

Technical Information

Manufacturer: BEHR
Models: Citroën C4, Peugeot 307 II
Product Codes: EAD511, B8036, U14
Additional Numbers: 6447VA

Installing this heating servo motor is relatively straightforward and can be performed either by a professional mechanic or as a DIY project. On average, replacement takes between one to two hours depending on your technical skills and experience.

Experience the quality and reliability of our used automotive parts. Investing in the BEHR EAD511 B8036 U14 heating servo motor for your Citroën C4 or Peugeot 307 II is an investment in your driving comfort and vehicle dependability. Order now and enjoy warmth and comfort on every journey!

Searching for a reliable replacement part for your Citroën or Peugeot vehicle’s heating system? The BEHR B5783 U heating servo motor is the perfect choice for Citroën C4 and Peugeot 307 II owners. This high-quality automotive part ensures optimal functionality to meet demanding technical requirements.

The heating servo motor is a crucial component of the vehicle’s heating system, responsible for precise temperature regulation and air distribution inside the cabin. This guarantees fast and efficient warming on cooler days, enhancing passenger comfort and safety.

Technical Information

• Manufacturer: BEHR
• Model: Citroën C4, Peugeot 307 II
• Product Codes: 6447RF, EAD512, B5783 U and 44
• Additional Numbers: 6447RZ

You can replace this heating servo motor yourself or seek assistance from a professional mechanic. The part is usually accessible from the vehicle’s interior, which simplifies installation. For optimal performance, regular inspection and maintenance of the entire heating system are recommended.

Before purchasing, please verify product compatibility with your vehicle’s model and product codes to ensure full functionality. Should you have any questions regarding installation or the part’s operation, feel free to contact us. We are here to support you in maintaining smooth operation of your vehicle.

This BEHR Heater Servo Motor with Gasket is specifically designed for use in heating systems of Citroën and Peugeot vehicles, including Citroën C4 and Peugeot 307 II models. It plays a crucial role in regulating the airflow by controlling the heater flap position, ensuring optimal cabin temperature and comfort.

Function and Common Issues

The servo motor operates by receiving signals from the climate control unit to adjust the blend door or heater valve within the HVAC system. Over time, wear and tear or electrical faults can cause the motor to malfunction, resulting in poor or no temperature control, unusual noises, or unresponsive climate settings. Regular maintenance and timely replacement enhance vehicle comfort and prevent further HVAC system damage.

Installation Information

Replacing the heater servo motor involves accessing the HVAC housing inside the dashboard, unfastening the faulty servo motor, and installing the new unit along with its gasket to ensure airtight sealing. It is recommended to disconnect the battery before starting the replacement to avoid electrical issues. This process is suitable for experienced mechanics or skilled DIYers familiar with vehicle HVAC systems.

Technical Information

• Manufacturer: BEHR
• Model Compatibility: Citroën C4, Peugeot 307 II
• Product Codes: EAD512, H1959 Ub 43, 6447RF
• Additional Codes: H1959

Why Choose This Part?

Manufactured by BEHR, a leading supplier of automotive cooling and heating components, this servo motor guarantees precision fit and reliable performance. Its durable plastic intermediate piece ensures smooth operation and reduces mechanical wear. Perfect for professional repair shops and vehicle owners performing self-maintenance.

This heating servo motor is designed specifically for Citroën C4 and Peugeot 307 II models, ensuring optimal performance within the vehicle’s HVAC (Heating, Ventilation, and Air Conditioning) system. Manufactured by BEHR, the EAD511 H1961 Ua 2 model effectively controls the position of the heating blend door, regulating cabin temperature by directing airflow through the heater core.

Function and Importance

The servo motor plays a crucial role in maintaining comfortable interior conditions by adjusting the mix of hot and cold air. Over time, these motors can fail due to wear or electrical issues, resulting in inconsistent temperature control or the inability to change heating settings. Common symptoms of failure include unusual noises from the dashboard area, sluggish response, or complete loss of heater function.

Installation and Maintenance

Replacement of this heating servo motor is straightforward for experienced mechanics and capable DIY enthusiasts. It typically involves removing the dashboard panel to access the HVAC system, disconnecting the faulty motor, and fitting the new BEHR EAD511 part. Using the correct replacement ensures proper integration with the vehicle’s electronics and control system, avoiding potential faults.

Technical Information

• Manufacturer: BEHR
• Models: Citroën C4, Peugeot 307 II
• Product Codes: EAD511, H1961 Ua 2
• Additional Numbers: 6447VA

Why Choose This Part?

Selecting this genuine or OEM-equivalent servo motor guarantees compatibility and durability, ensuring your vehicle’s heating system performs reliably across all conditions. Whether you are a professional mechanic or a car owner performing your own repairs, this heating servo motor is a vital component to restore HVAC functionality and maintain driving comfort.

Description

This replacement heater servo motor (HVAC actuator) is designed for Citroën C4 and Peugeot 307 II climate systems. Supplied with common manufacturer and aftermarket references (Behr / EAD512 / 6447RF / 6447RZ / H1959), the unit drives the internal flaps that control airflow direction and temperature mixing inside the dashboard. The part is often searched by its product codes, so listing OE and reference numbers helps mechanics and DIY enthusiasts find the correct item quickly.

Application And Function

The servo motor operates the blend/mode flaps in the heater and ventilation box, enabling correct distribution of warm or cold air to the cabin (footwell, face vents, windshield) and mixing of hot/cold air to achieve set temperatures. Proper operation is essential for climate comfort and windshield demisting. Typical fitment vehicles: Citroën C4 and Peugeot 307 II (verify part number compatibility with your vehicle’s listed codes).

Symptoms Of Failure

• Clicking or knocking noises from the dashboard when changing HVAC settings.
• No airflow from selected vents or inability to change vent mode.
• Incorrect cabin temperature due to failed blend control.
• Intermittent operation or complete loss of actuator movement.

Recommended Installation

Installation is straightforward for a trained mechanic but typically requires partial dashboard access. Typical procedure:

• Disconnect the battery before starting to avoid short circuits and protect vehicle electronics.
• Access the actuator by removing glovebox or lower dash panels as required for your model.
• Unplug the electrical connector and remove the mounting screws holding the old servo motor.
• Fit the new unit in the same orientation, secure with screws, and reconnect the connector.
• Reinstall trim panels and reconnect the battery. Cycle the HVAC controls through full range to allow the mechanism to settle; if required, perform an actuator calibration or adaptation using diagnostic equipment.

For workshop technicians: if the HVAC system does not return to correct operation after mechanical replacement, perform an adaptation procedure with a compatible diagnostic tool. Follow manufacturer removal/installation sequences to avoid damaging plastic gears or cables.

Why The Part Most Often Fails

• Plastic Gear Wear Or Breakage: Internal plastic gears can wear or snap over time, causing loss of movement or noisy operation.
• Motor Burnout Or Electrical Faults: Motor windings or electronics may fail due to age or voltage spikes.
• Contamination And Moisture: Dust, debris, or moisture ingress can seize gearing or corrode connectors.
• Mechanical Strain: Stiff or obstructed flap mechanisms increase load on the servo and accelerate wear.

Technical Information

• Manufacturer: Behr
• Model: Citroën C4; Peugeot 307 II
• Product Codes: 6447RF; 6447RZ; H1959; EAD512
• Additional Numbers: H1959 U b 21; EAD512 6447RF

Notes For Buyers

This servo motor is commonly searched by its reference numbers—listing these codes in your search will increase the chance of finding the correct unit. Suitable for technicians and skilled DIYers comfortable with dashboard disassembly. Always follow safety procedures and vehicle-specific instructions during replacement.

Description

This high-quality heater servo motor (climate control actuator) is designed for precise control of the HVAC flaps in Citroën C4 Picasso and Grand C4 Picasso models (first generation, up to 2013). The unit houses a geared DENSO motor that moves temperature and distribution flaps in the heater box, restoring accurate airflow direction and temperature regulation. Ideal for professional workshops and experienced DIY mechanics who need a direct-fit replacement that is commonly searched by product codes such as EAB251 or 6447WZ.

Benefits

– Restores Correct Airflow And Temperature Control: Eliminates uneven cabin heating, stuck flaps, and incorrect vent positions.

– Direct Fit For Targeted Models: Designed to match the original mounting and electrical interface for easy replacement.

– Practical For Mechanics And DIYers: Commonly referenced by OE and aftermarket codes, making fast sourcing and ordering simpler.

Technical Information

• Manufacturer: DENSO
• Model: Citroën C4 Picasso; Grand C4 Picasso (Up To 2013)
• Product Codes: EAB251; 6447WZ; A 21200500
• Additional Numbers: 21200500; Stellantis Citroën/Peugeot References
• Operating Voltage: 12 V (Standard Automotive Electrical System)

Installation Recommendation

Before Starting: Always disconnect the negative terminal of the battery and follow the vehicle manufacturer’s safety steps to avoid electrical damage. Typical Replacement Steps:

• Access The HVAC Housing: Usually requires removal of the glovebox or lower dashboard panels to reach the heater box.
• Disconnect Electrical Connector: Unplug the actuator connector carefully to avoid damaging pins.
• Remove Fasteners: Unscrew retaining screws or release clips holding the actuator to the heater box.
• Fit New Unit: Install the new servo motor in the correct position, ensuring the spline/gear meshes with the flap shaft without forcing.
• Test Function Before Reassembly: Reconnect the battery, cycle the HVAC system through different modes and temperatures to confirm correct movement of flaps, then reassemble interior panels.

Additional Tips: Check for foreign objects or broken airflow vanes inside the heater box before fitting the new actuator. If flaps are stiff or damaged, replace them to avoid premature failure of the new motor.

Why This Part Fails Most Often

– Worn Plastic Gears: Repeated use and mechanical wear of the internal reduction gears can cause slipping or loss of movement.

– Debris Or Foreign Objects: Leaves, small parts, or accumulated dust inside the heater box can jam the flaps and overload the motor.

– Water Ingress Or Condensation: Moisture entering the actuator can corrode internals and cause electrical faults.

– Motor Wear: Internal brushes or motor windings degrade over time, reducing torque until the actuator stops responding.

There Is No Fixed Replacement Interval; Replace The Actuator When Symptoms Appear (Clicking, Stuck Flaps, Incorrect Temperature Or Fault Codes Related To HVAC).

Compatibility And Ordering

Commonly Searched By Codes: EAB251, 6447WZ, A 21200500, 21200500. Confirm Fitment By Matching Physical Connector And Mounting Location On The Vehicle. This unit Is Intended For Citroën C4 Picasso And Grand C4 Picasso (First Generation, Up To 2013).

Final Note

Designed For Professional Use And Skilled DIY, This DENSO Heater Servo Motor Offers A Reliable Way To Restore HVAC Functionality In Affected C4 Picasso Models. Order Using The Product Codes Above For Faster Identification And Delivery.