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Part #: SW9977C

Universal Air SW9977C A/C Refrigerant Temperature Sensor

Refrigerant Temperature Sensor
⚙️ 9 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Refrigerant Temperature Sensor
🚗Fitment: Mercedes-Benz, ML350, ML500, and ML320
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Reliable A/C Refrigerant Temperature Sensor for Mercedes-Benz ML Models

The Universal Air Refrigerant Temperature Sensor SW9977C is designed to provide accurate temperature readings for the air conditioning system in select Mercedes-Benz vehicles. This sensor helps maintain optimal HVAC performance by monitoring refrigerant temperature in real time.

  • Compatible with Mercedes-Benz ML320, ML350, and ML500 models
  • Part number SW9977C ensures precise fit and function
  • Monitors refrigerant temperature to support efficient A/C system operation
  • Direct replacement sensor for HVAC system diagnostics and control
  • Manufactured by Universal Air, a trusted brand in automotive HVAC components

About the Universal Air Refrigerant Temperature Sensor Line

The Refrigerant Temperature Sensor product line from Universal Air focuses on delivering reliable sensors specifically engineered for automotive HVAC systems. These sensors are designed to accurately measure refrigerant temperature, which is critical for regulating the air conditioning system's performance and preventing system faults. The SW9977C is part of this line, tailored for Mercedes-Benz ML series vehicles to ensure compatibility and consistent operation.

Product Details and Functionality

The SW9977C A/C Refrigerant Temperature Sensor plays a vital role in the HVAC system by detecting the temperature of the refrigerant circulating through the air conditioning system. Accurate temperature data allows the vehicle's climate control module to adjust compressor cycling and airflow, maintaining cabin comfort and system efficiency. This sensor is engineered to meet OEM specifications for the Mercedes-Benz ML320, ML350, and ML500 models, providing a direct fit replacement that integrates seamlessly with existing HVAC components.

Common Issues Addressed by the SW9977C Sensor

  • Inaccurate refrigerant temperature readings causing improper A/C cycling
  • HVAC system failure to maintain desired cabin temperature
  • Compressor cycling issues leading to premature wear
  • Erratic air conditioning performance or inconsistent cooling
  • Diagnostic trouble codes related to refrigerant temperature sensor faults

Installation Notes and Tips

  • Ensure vehicle compatibility with Mercedes-Benz ML320, ML350, or ML500 before installation
  • Disconnect the battery prior to sensor replacement to avoid electrical issues
  • Locate the refrigerant temperature sensor within the HVAC system as per vehicle service manual
  • Handle the sensor carefully to avoid damage to the sensing element
  • Verify proper electrical connections and sensor calibration after installation

Quality Assurance and Warranty

Universal Air manufactures the SW9977C sensor to meet industry standards for durability and performance. While specific warranty details may vary, Universal Air products typically come with a limited warranty covering defects in materials and workmanship. This ensures that the Refrigerant Temperature Sensor maintains reliable operation throughout its service life when installed correctly in compatible Mercedes-Benz ML models.

This part fits 9 vehicles. Search below:

YearMakeModelPositionNotes
2005Mercedes-BenzML350N/ARefrigerant Temperature Sensor
2005Mercedes-BenzML500N/ARefrigerant Temperature Sensor
2004Mercedes-BenzML350N/ARefrigerant Temperature Sensor
2004Mercedes-BenzML500N/ARefrigerant Temperature Sensor
2003Mercedes-BenzML320N/ARefrigerant Temperature Sensor
2003Mercedes-BenzML350N/ARefrigerant Temperature Sensor
2003Mercedes-BenzML500N/ARefrigerant Temperature Sensor
2002Mercedes-BenzML320N/ARefrigerant Temperature Sensor
2002Mercedes-BenzML500N/ARefrigerant Temperature Sensor

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.