The Proton Wira Thermistor Sensor (Denso 077500-0690) is the original temperature probe used in Wira models equipped with Denso cooling systems. It is a precision component that sends temperature data to the AC amplifier to regulate the compressor and prevent evaporator icing.
 

• Part Number: 077500-0690
• Brand: Denso (100% Genuine Japan)
• Connector: 2-Pin socket
• Application:
  • Proton Wira (1.3 / 1.5 / 1.6 / 1.8)
  • Proton Satria (Old models)
  • Proton Putra
• Function: Monitors the cooling coil's surface temperature to prevent the system from freezing.

Technical Verification

• Denso vs. Sanden: Before buying, check your cooling coil brand. If your Wira uses a Sanden system, you likely need a different thermistor (often integrated with the Sanden amplifier). The 077500-0690 is strictly for Denso-spec setups.
• Failure Signs: If your AC blows mist or the air volume drops to almost nothing during long drives (icing), but returns to normal after the car sits for 30 minutes, this sensor is likely out of calibration.