Function: The heater fan (blower motor) pushes warm air from the heater core into the passenger compartment and distributes airflow across vents. Proper blower operation is essential for rapid cabin warm-up, demisting the windshield and maintaining passenger comfort.

Common Failure Modes: Blower motors typically fail due to bearing wear, motor winding degradation, foreign debris lodged in the fan wheel, or electrical issues such as corroded connectors or a faulty speed regulator/resistor. Signs of failure include unusual noise, reduced airflow, intermittent operation or complete stop.

Replacement And Installation Notes: Before starting, disconnect the vehicle battery. Access to the rear-left heater fan on the first-generation C4 Picasso usually requires removal of interior trim panels or the glovebox area to reach the blower housing. Remove electrical connectors and fasteners securing the unit, extract the old fan module and install the replacement in reverse order. Verify connector condition, clean ducting of debris and test all fan speeds after installation. If the fan still operates only on certain speeds or not at all, the speed regulator/resistor may need replacement; this regulator is sold separately.

Technical Information

• Manufacturer: Citroën
• Model: Citroën C4 Picasso (first generation)
• Product Codes: 9688094980, 6441X4
• Other Numbers: 9650872580

Choosing this used replacement part can reduce repair costs while restoring heating performance. It is recommended to inspect wiring and the speed regulator during replacement to ensure long-term, quiet operation of the heating system.

High-quality used heater blower fan designed for the Citroën C4 Picasso first generation. This left-rear heater fan restores heating performance and cabin airflow, ensuring passenger comfort during colder months. It is commonly referenced by OE part numbers and sought after by professional mechanics and DIY enthusiasts repairing PSA vehicles.

Key Functions

The blower fan circulates warm air from the heater core into the cabin. Proper operation supports interior comfort and helps maintain efficient defogging and demisting of windows. If the blower underperforms, airflow is reduced and cabin heating and ventilation are compromised.

Common Failure Modes and Causes

• Wear of motor brushes or bearings leading to noisy operation or complete stoppage.
• Accumulation of debris or trapped objects that impede the fan wheel.
• Electrical issues such as poor connections, blown fuses, or a failed speed regulator/resistor.
• Moisture ingress causing corrosion and accelerated wear.

Replacement And Installation Notes

Installation is straightforward for an experienced technician or competent DIYer. Basic procedure: disconnect the vehicle battery, remove the relevant interior trim or access panel, disconnect the electrical connector, unfasten the mounting screws, extract the old blower unit and install the replacement. Reconnect the wiring and test all blower speeds before reassembling trim. Always observe basic safety precautions and, where applicable, consult a repair manual for vehicle-specific access points on the C4 Picasso.

Maintenance Tips

• Inspect the blower wheel for debris and clean periodically to prolong life.
• Check the blower resistor/speed regulator and fuses when diagnosing intermittent speeds.
• Lubrication is not typically required for sealed motors; replace if bearings are worn or noisy.

Accessories

The speed regulator (blower resistor/speed control module) is not included and can be purchased separately to restore full speed control when required.

Technical Information

• Manufacturer: Citroën
• Model: C4 Picasso (First Generation)
• Product Codes: 9650872580, 9688094980, 6441X4
• Additional Numbers: 9650872580 (other possible variants may apply)

Choose this used heater blower fan if you need a direct-fit replacement for the Citroën C4 Picasso I. The unit is a practical option for restoring reliable cabin airflow; mechanics and DIY owners appreciate its OEM compatibility and straightforward installation.