Description
Evaporator Temperature Sensor for Citroën and Peugeot Vehicles.
This Evaporator Temperature Sensor (OE Reference 6445NZ) is a direct-fit replacement for select Citroën and Peugeot models. Designed for professional workshops and experienced DIYers, it restores proper HVAC control by accurately monitoring the evaporator core temperature to prevent freezing and to ensure reliable air conditioning performance. Ideal for mechanics who frequently search by product code, this sensor offers a straightforward install and dependable operation when matched to the correct vehicle applications.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C8; Peugeot 807
- Product Codes: 6445NZ
- Additional Numbers: Not Specified
Function
The Evaporator Temperature Sensor continuously measures the temperature of the A/C evaporator core and sends that information to the vehicle’s HVAC control module. The control unit uses this input to regulate compressor cycling and blend/recirculation strategies, preventing evaporator icing, maintaining cabin comfort and protecting the system from damage caused by overcooling.
Installation Recommendations
- Safety First: Disconnect the battery before starting work on the HVAC electrical connections.
- Access: The sensor is typically mounted in the evaporator housing behind the dashboard. Partial dash removal or access through a service port may be required depending on model.
- Removal: Unplug the electrical connector, release any retaining clip and gently withdraw the sensor from the evaporator tube or pocket. Avoid excessive force to prevent damage to the housing.
- Fitment: Inspect the sensor seating and O-ring (if present). Lightly lubricate new O-ring with system-safe grease and insert the sensor until it clicks or seats fully. Reconnect the electrical connector securely.
- Post-Install: Restore battery power, run A/C system to verify normal operation and confirm no intermittent cycling or unusual temperature behavior.
Replacement Procedure (Overview)
1. Remove necessary dash panels or access covers to reach the evaporator housing. 2. Disconnect the sensor connector and remove the sensor retaining clip. 3. Withdraw the old sensor and compare to the new unit (check connector type and length). 4. Install the new sensor, secure the clip, reconnect the plug and reassemble panels. This is a moderate-difficulty job—recommended for experienced technicians or competent DIYers with basic dash removal skills.
Common Failure Causes
- Moisture Ingress And Corrosion: Condensation and trapped moisture can corrode terminals or degrade the sensor element over time.
- Electrical Problems: Damaged wiring, broken connector pins or poor grounding lead to intermittent readings or complete failure.
- Physical Damage: Mishandling during previous repairs or debris in the evaporator housing can damage the sensor tip or housing.
- Age And Environmental Stress: Thermal cycling and long-term exposure to refrigerant/oil residues accelerate wear.
Service Life And Symptoms
There Is No Scheduled Replacement Interval; Service Life Varies With Use And Environment. Typical Symptoms Of A Faulty Sensor Include Rapid A/C Compressor Cycling, Reduced Cooling Performance, Evaporator Ice Formation Or Inaccurate Temperature Regulation Inside The Cabin. When These Symptoms Appear, Inspect The Sensor And Wiring As Part Of The HVAC Diagnostic Procedure.
Buy This Evaporator Temperature Sensor (6445NZ) To Restore Accurate Evaporator Monitoring And Reliable A/C Performance On Compatible Citroën And Peugeot Models. The Product Code Makes It Easy To Locate The Correct Part Quickly In Workshops And Online Catalogs.
