Description
Heater servo motor for CITROËN and PEUGEOT vehicles. You may receive a direct replacement. Climate control gearmotor.
Product Overview
This Valeo-style heater servo motor (HVAC actuator / gearmotor) is designed for controlling airflow flaps and blend doors in Citroën and Peugeot climate systems. It is a direct-fit replacement for many Stellantis models and restores precise flap movement for reliable cabin temperature control. Commonly referenced by product codes T1006419G, 3006121B or 6447NL, this servo motor is a frequently searched spare part by mechanics and DIYers repairing HVAC systems.
Key Features & Benefits
- Direct Replacement: Designed to fit original mounting points and electrical connectors on compatible Citroën and Peugeot models.
- Precise Control: Replaces worn actuators to restore accurate flap positioning and improve climate control response.
- Durable Construction: Electric motor with integrated gearset for reliable operation under normal conditions.
- Easy Identification: Often referenced by part numbers T1006419G, 3006121B and 6447NL for fast lookup and ordering.
Installation Guide
Replacement of a heater servo motor is a moderate task for experienced DIYers and routine for professional mechanics. Typical replacement steps:
- Disconnect Battery: Always isolate vehicle battery before starting work to avoid short circuits and protect vehicle electronics.
- Access Actuator: Depending on model, actuator is usually located on the HVAC housing behind the glovebox or under the dashboard on the passenger side. Remove trim or glovebox as required to reach the unit.
- Disconnect Connector: Unplug the electrical connector and note the actuator orientation before removal.
- Remove Fasteners: Unscrew the mounting screws/bolts securing the actuator to the heater box and remove the actuator gently from the gear boss.
- Install Replacement: Fit the new servo in the same orientation, secure fasteners, reconnect the electrical plug and reassemble interior panels.
- Function Check: Reconnect the battery, cycle the ignition and run the climate system through modes to confirm correct movement. Some systems perform automatic self-calibration on first power-up.
Installation Recommendations
- Use Appropriate Tools: Small Torx or Phillips drivers and a flashlight help with confined spaces behind the dash.
- Protect Trim And Airbags: Take care when removing panels near airbag modules. Follow manufacturer procedures for trim removal.
- Verify Connector And Gear Engagement: Ensure the actuator drive spline meshes fully with the HVAC gear boss to avoid stripped teeth or misalignment.
- Test Before Reassembly: Power the actuator briefly to confirm correct rotation and end stops before refitting all trim pieces.
Why The Part Most Often Fails
- Plastic Gear Wear Or Breakage: Most common cause is fractured or stripped plastic gear teeth in the small internal gearbox.
- Electrical Motor Wear: Brushes or motor windings can degrade over time, causing intermittent or no movement.
- Corrosion And Moisture Ingress: Moisture or debris in the HVAC box can accelerate wear or block movement.
- Obstacle Or Mechanical Binding: Debris or a warped flap can overload the actuator, leading to premature failure.
Technical Information
- Manufacturer: Valeo
- Model(s): Citroën C2, Citroën C3, Citroën C4 II, Peugeot 308 (compatibility depends on year/variant)
- Product Codes: T1006419G, 3006121B
- Additional Numbers: 6447NL
- Type: Heater Servo Motor / HVAC Gearmotor
- Location: HVAC Unit (behind glovebox / passenger-side of dashboard)
Notes For Mechanics And DIYers
This servo is a commonly replaced HVAC component on affected Citroën and Peugeot models. When ordering, using the part codes (T1006419G, 3006121B, 6447NL) improves the chance of a correct fit. After installation, verify full range of motion across all climate settings. If the system shows error codes or requires initialization beyond simple cycling, use dealer-level diagnostic tools or consult technical documentation for the vehicle.
