Universal Air SW9977C A/C Refrigerant Temperature Sensor

Refrigerant Temperature Sensor for Mercedes-Benz HVAC

Universal Air SW9977C is an A/C refrigerant temperature sensor for Mercedes-Benz ML-Class applications. It is listed for specific ML320, ML350, and ML500 model years and is used in HVAC temperature monitoring within the refrigerant circuit.

Key Features

• Brand: Universal Air
• Part number: SW9977C
• Product line: Refrigerant Temperature Sensor
• Category: HVAC sensors
• Direct fitment listed for select Mercedes-Benz ML-Class vehicles
• Supports refrigerant temperature sensing for A/C system control

Product Details

The Universal Air Refrigerant Temperature Sensor, part number SW9977C, is a replacement HVAC sensor for select Mercedes-Benz ML-Class vehicles. It is listed for 2002-2003 Mercedes-Benz ML320, 2003-2005 Mercedes-Benz ML350, and 2002-2005 Mercedes-Benz ML500 applications. If you are searching for a Mercedes-Benz ML350 refrigerant temperature sensor or an A/C refrigerant temperature sensor for a Mercedes-Benz ML500, SW9977C is the referenced part number for these fitments.

This sensor is used by the climate control system to monitor refrigerant temperature and support proper A/C operation. The SW9977C part number is also useful when cross-checking replacement options for Mercedes-Benz ML320 HVAC sensor service.

Common Issues This Part May Address

• Inaccurate refrigerant temperature readings
• A/C cycling concerns related to sensor input
• Climate control performance issues tied to sensor failure
• HVAC diagnostic trouble codes involving refrigerant temperature monitoring
• Intermittent compressor operation caused by faulty sensor data

Installation Notes and Tips

Verify the vehicle year, model, and HVAC sensor location before ordering. Confirm connector style and sensor placement against the original part on the vehicle. For best results, inspect the surrounding refrigerant circuit components and clear any stored HVAC fault codes after installation.

Quality Assurance

Universal Air supplies HVAC replacement components for automotive air conditioning service. Part number SW9977C is cataloged for the listed Mercedes-Benz ML-Class applications and should be matched to the vehicle’s original sensor specification before installation.