Description
Climate Control Heating Unit for Citroën C4 Picasso and Grand C4 Picasso up to 2013. Tested – functional.
Description
Reliable replacement HVAC control panel designed for Citroën C4 Picasso and Grand C4 Picasso vehicles (models up to 2013). This unit manages heating, ventilation and air conditioning functions—fan speed, temperature selection, air distribution, recirculation and air conditioning engagement—providing intuitive control for driver and passengers. Ideal for mechanics and DIY enthusiasts searching by part numbers 9659796977 or 6451XH.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4 Picasso, Grand C4 Picasso (up to 2013)
- Product Codes: 9659796977, 6451XH
- Other Numbers: NFP
Installation Recommendations
Before starting work always disconnect the negative battery terminal. Typical replacement procedure:
- Disconnect the battery to prevent short circuits and protect vehicle electronics.
- Remove the centre fascia trim around the radio and climate unit using trim tools to avoid damage to clips and panels.
- Unscrew the retaining screws securing the climate control module and carefully pull the unit forward.
- Unplug all electrical connectors and any vacuum or temperature sensor lines (if present) from the rear of the unit.
- Fit the replacement unit, reconnect connectors securely and reassemble the trim in reverse order.
- Reconnect the battery and verify all HVAC functions: fan speeds, temperature control, A/C engagement, recirculation and vent selection.
Use correct torque on fasteners and avoid forcing connectors. If the unit has visible damage or corrosion on mating connectors, clean contact points before installation.
Why This Part Commonly Fails
- Wear of mechanical switches or rotary potentiometers from frequent use—leading to unreliable fan speed or temperature response.
- Electronics degradation due to heat cycling, moisture ingress or condensation inside the dashboard area.
- Corroded or loose connector pins causing intermittent operation or loss of certain functions.
- Internal LCD/display failure or backlight issues resulting in unreadable controls.
Practical Notes
Units with matching product codes 9659796977 and 6451XH are commonly searched by technicians and DIYers—keeping the original part number handy speeds up sourcing and fitment. In most cases the control unit is plug-and-play; after installation verify full HVAC function before returning the vehicle to service.
