Product Overview

This Denso heater blower with integrated regulator is designed for Citroën/Peugeot HVAC systems and delivers reliable cabin air circulation and precise fan speed control. Built by a leading HVAC supplier, the unit is suitable for professional workshops and DIY mechanics who need a direct replacement for ventilation faults in compatible Citroën models.

Key Benefits

• Direct fit design for straightforward replacement in compatible vehicles.
• Integrated regulator ensures smooth, step-free fan speed control in most HVAC systems.
• Robust Denso engineering for reliable airflow and low noise operation.
• Commonly cross-referenced by product codes for fast searching and ordering.

Technical Information

• Manufacturer: Denso
• Model: Citroën C4 Picasso (typical application), Citroën Xsara (possible application)
• Product Codes: 6441CG, 6441CE
• Other Numbers: Alternate notations 6441ce, 6441CG

Function

The blower motor circulates air through the vehicle’s heating, ventilation and air-conditioning (HVAC) system. The regulator modulates motor speed—either via resistor stages or an electronic control (PWM/transistor module depending on the car’s HVAC design)—allowing the driver to set fan intensity precisely.

Common Faults And Causes

Failure modes typically seen in blower assemblies include:

• Worn bearings or seized motor, causing noise or complete stoppage.
• Debris (leaves, dust) lodged in the fan cage, increasing load and wear.
• Electrical faults in the regulator or connector corrosion leading to intermittent or no fan speeds.
• Moisture ingress or overheating damaging the motor windings or control electronics.

Replacement Procedure (Overview)

Typical replacement steps for a trained mechanic or competent DIYer:

1. Disconnect the negative battery terminal before starting work to avoid electrical damage.
2. Gain access to the blower housing—this is commonly located behind the glovebox or under the passenger-side dashboard; remove trim panels and glovebox as required.
3. Disconnect the electrical connector and any wiring retainers.
4. Remove fasteners securing the blower assembly to the housing and extract the unit; note orientation for reinstallation.
5. If the regulator is separate, replace the regulator module; if integrated, replace the complete blower assembly.
6. Refit the assembly, reconnect connectors, reassemble trim and reconnect the battery. Test all fan speed settings and HVAC functions before handing the vehicle back.

Installation Recommendations

• Always disconnect the battery before removal to protect vehicle electronics and avoid short circuits.
• Inspect the blower housing and air intake for debris; clean the cabin filter and intake area to prevent premature wear of the new blower.
• Check electrical connectors and wiring for corrosion or damage; repair or replace corroded terminals to ensure reliable operation.
• After installation, verify all fan speeds and listen for unusual noises that could indicate installation misalignment or remaining debris.
• Allow installation by a trained technician if you are not familiar with interior trim removal—improper removal can damage clips and panels.

Why This Part Most Commonly Fails

The blower motor and its regulator are exposed to dust, leaves and moisture entering the HVAC intake. Accumulated debris increases mechanical load on the motor bearings and can obstruct the fan cage. Electrical wear on the regulator components and connector corrosion from moisture are frequent causes of loss of fan speed control or total failure. Regular cabin filter changes and keeping the intake area clean reduce risk of premature failure.

Notes For Professionals

Search by product codes 6441CG or 6441CE when ordering to find matching units quickly. Suitable for technicians performing HVAC repairs on Citroën C4 Picasso models and certain related vehicles; confirm fitment by matching the part code and vehicle application.