Description
Interior Air Temperature Sensor For Citroën And Peugeot Vehicles
Evaporator Probe
Product Overview
The Interior Air Temperature Sensor (evaporator probe) with reference 6445YY is designed for Citroën and Peugeot HVAC systems. It measures the temperature of the air around the evaporator or inside the ventilation ducts and provides the climate control unit with the data needed to regulate cabin temperature and compressor cycling. Frequently searched under code 6445YY, this sensor is a common replacement part for vehicles experiencing incorrect cabin temperature readings or air conditioning control faults.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Interior Air Temperature Sensor / Evaporator Probe
- Product Codes: 6445YY
- Other Numbers: Not Available
Compatibility
- Citroën C3 II
- Citroën C4
- Citroën C5 X7
- Peugeot 3008 I
- Peugeot 307
- Peugeot 407
- Peugeot 5008 I
Function And Location
The sensor monitors the temperature of air passing over or immediately adjacent to the evaporator core and sends this information to the climate control module. Based on its signal, the system adjusts blower speed, flap positions and compressor engagement to maintain the set cabin temperature. The sensor is typically mounted in the evaporator housing or air ducting behind the glovebox or lower dashboard area.
Symptoms Of A Faulty Sensor
- Incorrect Cabin Temperature Compared To Set Value
- Automatic Climate Control Cycling Erratically Or Not Maintaining Temperature
- Intermittent Air Conditioning Performance
- Error Messages Or Fault Codes Related To Climate Control Sensors
Why The Part Fails Most Often
Failures are most commonly caused by moisture ingress and corrosion at the sensor tip or connector, contamination from dust and debris, mechanical damage during servicing, or gradual degradation of the sensing element with age. Poor electrical contact or wiring harness damage can also produce intermittent or incorrect readings.
Replacement Procedure
- Park Vehicle On Level Surface And Switch Off Ignition.
- Disconnect The Negative Battery Terminal To Prevent Short Circuits.
- Gain Access To The Sensor By Removing The Glovebox Or Lower Dash Trim As Required.
- Locate The Sensor On The Evaporator Housing Or Air Duct, Release Any Retaining Clip And Unplug The Electrical Connector.
- Remove The Old Sensor And Fit The New Unit In The Same Orientation; Ensure A Secure Mechanical Fit And Good Electrical Connection.
- Reassemble Trim, Reconnect Battery And Start The Vehicle. Verify Climate Control Operation And Clear Any Stored Fault Codes With A Diagnostic Tool If Necessary.
Recommended Installation
Handle The Sensor Tip Carefully And Avoid Contaminating It With Oils Or Debris. Inspect Connector And Wiring For Corrosion Or Damage; Replace Damaged Clips Or Seals To Prevent Water Ingress. Use OEM-Type Connector Clips When Reassembling. After Installation, Run The Climate System Through Several Modes To Confirm Proper Response. For Vehicles With Stored Climate Control Faults, Use A Diagnostic Tool To Read And Clear Codes.
Notes
This sensor is an essential component of automatic climate control; replacing a failed unit typically restores accurate temperature regulation. Because it is commonly searched by its code, enter 6445YY when looking for this part to speed up identification.
