Description
Solar radiation intensity sensor suitable for Peugeot 307, 308, 406, 3008, 5008 and Citroën C4.
This solar radiation sensor (OE References 9833418780, 6445NH) measures incoming sunlight intensity and provides the climate control system with the data needed to automatically regulate cabin temperature and fan speed. It is compatible with a range of Stellantis vehicles listed below and is commonly used to restore correct automatic air-conditioning behavior when the original sun sensor fails or gives inconsistent readings.
Overview
Function: The Sun Sensor Detects Solar Radiation Intensity To Allow The Automatic Climate Control To Compensate For Direct Sunlight. By Measuring Light Intensity, The Sensor Helps The HVAC Module Adjust Fan Speed, Air Distribution, And Temperature Setpoints To Maintain Comfort Without Manual Intervention.
Typical Location: Mounted On The Top Of The Dashboard Near The Windshield (Often Under A Small Grille Or Housing At The Centre Of The Dash). On Some Models It Is Integrated Into The Climate Sensor Assembly.
Common Symptoms Of A Faulty Sensor: Incorrect Automatic A/C Behavior, Overcooling Or Overheating In Sunlight, Unusual Fan Cycling, Or Diagnostic Trouble Codes Related To Ambient Light Inputs.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 II; Peugeot 307, 308, 406, 3008 I, 5008 I
- Product Codes: 9833418780, 6445NH
- Other Numbers: 6445NH | 9833418780 (Tags/References)
Installation Recommendations
- Safety First: Disconnect The Battery Before Starting Work To Avoid Short Circuits And Electronic Faults. Follow Manufacturer Procedures When Removing Dashboard Trim.
- Tools Required: Trim Removal Tools, Small Screwdrivers, Torque Tools If Applicable.
- Removal Steps: Carefully Pry Off The Dash Trim Or Grille Covering The Sensor, Unplug The Electrical Connector, Remove Any Fasteners And Extract The Old Sensor.
- Installation Steps: Fit The New Sensor In Place, Secure Fasteners To Manufacturer Torque Where Specified, Reconnect The Electrical Connector And Refit Trim Panels Cleanly.
- Post-Installation: Start The Vehicle And Verify Automatic Climate Control Operation In Auto Mode Under Different Light Conditions. Some Systems Perform A Self-Adaptation; If Required, Follow The Vehicle Service Manual Procedure To Reset Or Calibrate The Climate Control Module.
- Recommendation For Professionals: Inspect Wiring And Connector Pins For Corrosion Or Damage While Replacing The Sensor To Prevent Repeated Failures.
Most Common Failure Causes
- Environmental Degradation: Prolonged UV Exposure, Heat Cycling, And Age Can Degrade The Sensor Element.
- Moisture Ingress: Water Entry Into The Housing Or Connector Causes Intermittent Operation Or Failure.
- Connector And Wiring Issues: Corroded Pins, Broken Wires, Or Poor Grounding Lead To Erratic Signals.
- Mechanical Damage: Dashboard Removal, Impact, Or Mishandling During Repairs Can Damage The Sensor Or Its Mounting.
Lifespan And Replacement Advice
There Is No Fixed Replacement Interval; A High-Quality Sun Sensor Can Last Many Years. Replace The Unit When Symptoms Appear (Erratic Climate Control Behavior Or Relevant Fault Codes). When Replacing, Also Check The Climate Control Module And Surrounding Wiring To Ensure The Root Cause Is Addressed.
Keywords For Search
Sun Sensor, Solar Sensor, Sunlight Intensity Sensor, Climate Control Sensor, Citroën Sun Sensor, Peugeot Sun Sensor, 9833418780, 6445NH
