Description
Heating and air conditioning blower fan for Citroën C5 and Peugeot 407
Direct-fit electric blower motor and fan assembly designed for Citroën C5 II and Peugeot 407 HVAC systems. This replacement unit (references 4PUH-18456-BA / 6441S3) restores proper airflow for heating and air conditioning, reduces cabin noise compared with worn originals, and brings reliable ventilation performance for workshop repairs or DIY maintenance. Suitable for professional mechanics and skilled enthusiasts looking for a straightforward swap to fix weak airflow, loud bearings, or intermittent fan operation.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C5 II, Peugeot 407
- Product Codes: 4PUH-18456-BA, 6441S3
- Other Numbers: NFP
Function And Benefits
The blower fan supplies conditioned air from the heater core or evaporator into the passenger compartment. A healthy blower ensures even cabin temperature, efficient defogging, and proper operation of the climate system. Replacing a failing blower restores full fan speed range, eliminates bearing or brush noise, and prevents overheating of related components such as the blower resistor or HVAC control module.
Replacement Procedure (Overview)
Typical replacement is performed from the passenger-side footwell. Steps usually include: disconnect the vehicle battery; remove the glovebox or lower dash trim to access the blower housing; unplug the electrical connector; remove the retaining screws or clips; extract the old motor with fan wheel and fit the new unit; reconnect the electrical connector and reassemble trims. Torque fasteners to manufacturer specifications and check for electrical connector seating and free rotation of the fan wheel before final assembly.
Installation Recommendations
- Always disconnect the battery before starting work to avoid short circuits and to protect HVAC electronics.
- Inspect and clean the HVAC intake area for debris, leaves or accumulated dust that can damage the new fan wheel.
- Check the condition of the blower resistor and wiring harness if fan speeds are limited or intermittent; replace damaged connectors or fuses as needed.
- Verify that the fan wheel spins freely after installation and that no rubbing occurs against the housing or mounting points.
- Test all fan speeds and HVAC functions before reassembling the dash completely.
Most Common Failure Reasons
Failures typically result from worn bearings or brushes in the motor, accumulation of debris in the fan wheel, water ingress from clogged drains, or overheating due to restricted airflow. Symptoms include unusual grinding or rattling noises, reduced airflow, loss of certain fan speed settings, or complete loss of blower function. In some cases, the blower resistor or control electronics can be the root cause, so a thorough diagnosis is recommended.
Compatibility Notes
This blower is referenced by OEM codes 4PUH-18456-BA and 6441S3 and fits Citroën C5 II and Peugeot 407 models that use these part numbers. Using the correct reference number ensures direct fit and correct electrical connections for service or replacement.
