Description
Interior Air Temperature Sensor for PEUGEOT 308 T7 and Citroën C3 Picasso. Evaporator Sensor.
This Valeo interior/evaporator temperature sensor is an exact-fit electrical component designed for climate control systems in selected Citroën and Peugeot models. Ideal for professional workshops and experienced DIY mechanics, the sensor ensures accurate measurement of evaporator or cabin air temperature so the HVAC unit can regulate compressor engagement and maintain cabin comfort. Frequently searched by product numbers T1000210Q and 643665, this part improves air-conditioning reliability and prevents uncontrolled evaporator icing that leads to poor cooling performance.
Benefits: Fast, vehicle-specific replacement that restores correct temperature feedback to the climate control module; improved AC efficiency; reduced risk of evaporator freeze-ups; straightforward connector and clip fitment for quicker workshop turnaround. Recommended for garages and owners wanting a reliable OEM-quality sensor replacement for Citroën C3 Picasso and Peugeot 308 T7 installations.
Technical Information
- Manufacturer: Valeo
- Model: Peugeot 308 T7; Citroën C3 Picasso
- Product Codes: T1000210Q; 643665
- Other Numbers: Stellantis Citroën / Peugeot References
Installation Recommendations
Before starting, always disconnect the vehicle battery to avoid electrical short circuits. The sensor is typically mounted in the HVAC housing near the evaporator core or inside the cabin air plenum. Access commonly requires removal of the glovebox or lower dash panels. Steps: disconnect battery → remove necessary trim or glovebox → unplug the sensor electrical connector → unclip or unscrew the sensor from the HVAC housing → install the new sensor in the correct orientation → reconnect the connector and reassemble panels. After replacement, verify HVAC function and check for error codes using standard diagnostic tools. Take care handling connectors and plastic clips to avoid damage.
Why This Part Fails Most Often
- Moisture Ingress And Corrosion: Exposure to condensate or leaks can corrode terminals or sensor element.
- Contamination And Debris: Dust and particulate buildup in the HVAC system can impair sensor readings.
- Electrical And Connector Issues: Loose connections, broken wires, or connector corrosion cause intermittent or failed signals.
- Thermal Cycling And Ageing: Repeated temperature changes over years can degrade the sensor element.
- Damage During Servicing: The sensor or its housing can be accidentally damaged during evaporator or HVAC repairs.
Search Tip: Many technicians and DIYers locate this sensor by entering the part numbers T1000210Q or 643665 when ordering or checking fitment lists, which speeds sourcing and reduces downtime.
