Description
Interior Temperature and Humidity Sensor for Citroën and Peugeot
Overview
This interior cabin temperature and humidity sensor is designed for a range of Citroën and Peugeot models. It supplies the climate control unit with precise temperature and relative humidity data so the HVAC system can maintain comfortable cabin conditions, optimize compressor operation and improve demisting/defogging performance. The part is often searched by its product codes, so check the numbers below when ordering or replacing.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C2, C3, C3 Pluriel, C5 II, C6, C8, Xsara, Xsara Picasso; Peugeot 307, 407, 607, 807
- Product Codes: 9637937380, 6445HT
- Other Numbers: 52513D NFP
Function
The sensor measures cabin air temperature and relative humidity and sends the signal to the vehicle’s climate control module. Accurate readings allow the automatic HVAC system to regulate blower speed, blend doors and compressor engagement for stable cabin temperature, improved comfort and efficient defogging of windows.
Compatibility And Notes
Compatible with many Citroën and Peugeot models listed above. Buyers frequently search using the OEM product codes (9637937380, 6445HT, 52513D NFP), so include these numbers when looking up or ordering the part.
Replacement Procedure
Typical replacement steps (may vary by model):
- Locate The Sensor: Usually mounted inside the passenger compartment HVAC housing or behind dashboard trim, often near the center vents or glovebox area.
- Access: Remove the necessary trim panels or glovebox to reach the sensor. Keep fasteners and clips organized for reassembly.
- Disconnect: Unplug the electrical connector from the sensor. Inspect connector and wiring for corrosion or damage.
- Remove And Install: Unscrew or release the sensor from its housing and fit the replacement. Ensure the sensor sits correctly and seals if required.
- Reconnect And Test: Reconnect the electrical connector, reassemble trim, then start the vehicle and verify HVAC operation and temperature readings.
How Often It Fails
Cabin temperature/humidity sensors are generally durable and often last many years. Failures are more common on older vehicles or in cars exposed to moisture, dust or contaminated cabin air. You may notice issues after several years or high mileage, when the sensor gives unstable or incorrect temperature/humidity readings causing the automatic climate control to behave erratically.
Why The Part Most Commonly Fails
- Moisture Ingress: Prolonged exposure to high humidity or water leaks can corrode internal components.
- Contamination: Dust, soot or aerosols deposited on the sensing element degrade accuracy.
- Connector/Wiring Damage: Corroded or loose connectors cause intermittent signals.
- Age And Thermal Cycling: Long-term exposure to temperature variations can alter sensor characteristics.
Installation Recommendations
- Follow Manufacturer Procedures: Consult the vehicle’s repair manual for exact removal and installation steps specific to the model.
- Inspect Wiring And Connector: Replace corroded connectors or damaged wiring to avoid recurring faults.
- Handle The Sensor Carefully: Avoid touching the sensing element directly and protect it from contamination during fitting.
- Test After Installation: Verify automatic climate control response and check for diagnostic trouble codes related to HVAC sensors.
