Description
Heating and air conditioning control for Citroën Xsara Picasso vehicles.
This climate control unit (part numbers 96314105ZR, 6451FJ, 6451LV, 6451HP, NFP) is a direct-fit HVAC controller for Citroën Xsara Picasso models. Frequently searched by OE numbers, it restores reliable fan speed regulation, temperature selection and mode control for workshops and DIY mechanics. Practical design and straightforward replacement make it a common repair item when the heater or air conditioning user interface stops responding or shows intermittent behaviour.
Technical Information
- Manufacturer: Citroën (Stellantis)
- Model: Xsara Picasso (production years 1999–2012)
- Product Codes: 96314105ZR, 6451FJ
- Additional Numbers: 6451LV, 6451HP, NFP
Replacement Procedure
Typical replacement is straightforward for a competent technician or experienced DIYer:
- Disconnect the negative battery terminal to prevent short circuits and protect vehicle electronics.
- Remove the centre fascia trim using plastic trim tools to avoid damaging clips and finish.
- Unscrew the retaining screws for the HVAC control module and carefully slide the unit forward.
- Disconnect the electrical connector(s) and any cable linkages. Inspect connectors for corrosion or bent pins.
- Install the replacement controller, reconnect connectors, secure screws and refit the fascia trim.
- Reconnect the battery and test all HVAC functions: blower speeds, temperature adjustment, air distribution, recirculation and AC compressor engagement.
Installation Recommendations
- Always disconnect the battery before starting work to avoid electrical damage.
- Use non-marring trim tools to remove panels and preserve factory clips.
- Inspect wiring and connector terminals for heat damage, corrosion or torn insulation—repair before fitting the new unit.
- After installation, verify operation across all modes and fan speeds; if functions are intermittent, re-check connector seating and pin condition.
- Keep replacement screws and clips organized to ensure correct reassembly and prevent rattles.
Most Common Failure Reasons
- Wear of internal potentiometers and switches caused by frequent use, resulting in intermittent or non-responsive controls.
- Moisture ingress or condensation leading to corrosion on PCB traces or connectors.
- Thermal cycling and ageing that cause cracked solder joints or failing electronic components.
- Broken knobs, worn actuators or damaged mechanical linkages preventing proper mode selection.
- Connector corrosion or poor contact causing loss of signals to blower motor or actuators.
Notes
The unit is often located behind the centre dash fascia and is a common service item for heating and ventilation faults on the Xsara Picasso. Customers and technicians commonly search using the OE numbers listed above—including 96314105ZR and 6451FJ—to find the correct replacement quickly.
