Evaporator Temperature Sensor

Evaporator Temperature Sensor for Ford, Honda, BMW | Auto AC Parts

Product Description

Evaporator temperature sensor is a precision NTC thermistor sensor used to monitor the evaporator core temperature in automotive and HVAC air‑conditioning systems. Designed to replace OEM‑style sensors, it ensures accurate feedback to the AC control module, prevents evaporator freezing, and optimizes cooling performance.

By continuously detecting the temperature of the evaporator fins, our sensor helps:

• Avoid ice‑up of the evaporator core, which can damage the blower and reduce cooling efficiency.

• Prevent short‑cycling or compressor cut‑off faults caused by incorrect temperature signals.

• Maintain consistent cabin temperature control and energy‑efficient operation in passenger cars, trucks, buses, and commercial HVAC units.

You can rely on our sensors as a key component for the diagnostics and long-term reliability of your air conditioning system, especially in harsh environments where inaccurate readings can lead to frequent malfunctions and costly repairs.

Main Types of Evaporator Temperature Sensors

Our evaporator temperature sensors are widely used in automotive air conditioning systems, compatible with Ford, Honda, Chevrolet, Mercedes-Benz, Dodge, Hyundai, BMW, Volvo, and more.

• Evaporator Coil Temperature Sensor
• Air Conditioning Evaporator Temperature Sensor
• Bypass Evaporator Temperature Sensor
• Evaporative Air Temperature Sensor
• Evaporator Core Temperature Sensor
• Evaporator Discharge Air Temperature Sensor

Why Choose Our Evaporator Temperature Sensors?

• High reliability for after‑sales & repair networks

Our sensors are built to OEM‑equivalent standards, so they fit existing HVAC and AC ducts without modification, reducing installation time and service errors. This makes them ideal for spare‑part distributors, repair shops, and fleet maintenance centers.

• Prevent costly evaporator icing and compressor damage

Inaccurate evaporator sensors cause frequent compressor cut‑offs, frost buildup, and reduced airflow. Our high‑accuracy NTC design minimizes these failures, improving customer uptime and reducing warranty claims.

• Factory‑direct pricing with volume‑friendly MOQs

As a professional temperature sensor manufacturer with in‑house production, we offer competitive FOB / EXW pricing for distributors, OEMs, and aftermarket brands, with flexible MOQ and fast lead time.

• International compatibility and easy integration

Our sensors follow standard NTC R‑vs‑T curves and common connector types (pigtail, blade, molded plug), making them compatible with most global HVAC and automotive control modules. Documentation and specifications are available in English for easy integration into your documentation and catalogs.

Evaporator Temperature Sensor Technical Specifications

Typical Applications of  Evaporator Temperature Sensor

• Automotive AC systems

Used in passenger cars, SUVs, trucks, and buses to monitor evaporator core temperature and prevent icing while protecting the compressor from frequent short‑cycling.

• Commercial vehicles & fleet HVAC

Fitted into heavy‑duty AC units for buses and commercial trucks, where long‑run operation and reliability are critical for driver comfort and uptime.

• Light‑commercial HVAC and air handlers

Applied in small‑to‑medium HVAC units, air handlers, and cooling coils where evaporator temperature feedback is required for economizer or defrost control.

• Aftermarket spare‑parts & repair market

Sold as direct‑fit replacement for OEM‑style evaporator sensors, supporting fast turnover in repair shops and distribution warehouses.

FAQ

1. What is an evaporator temperature sensor?

An evaporator temperature sensor is a small electronic device that measures the temperature of the evaporator coil in an air‑conditioning or refrigeration system. It helps the control unit manage compressor operation and prevent the evaporator from freezing.

2. Where is the evaporator temperature sensor located?

In vehicles, the sensor is usually mounted near the evaporator core inside the HVAC housing, often behind the dashboard or glove box. In home and commercial AC units, it is typically attached to the evaporator coil or installed in the air duct near the evaporator outlet.

3.What is the function of the evaporator temperature sensor?

The evaporator temperature sensor continuously monitors evaporator temperature and sends this data to the AC control unit. The control unit then uses this signal to turn the compressor on or off, keeping the evaporator temperature in a safe range and maintaining stable cooling.

4. What is the purpose of the evaporator temperature sensor?

The main purpose is to prevent the evaporator from getting too cold and forming frost or ice. It also helps the system run more efficiently, improves comfort, and protects the compressor and other components from damage caused by overcooling or frequent cycling.

5. What are common evaporator temperature sensor symptoms?

Typical symptoms of a bad evaporator temperature sensor include weak or no cooling, erratic compressor operation, frequent cycling, and frost or ice buildup on the evaporator or inside the air‑conditioning box. In some vehicles or systems, relevant fault codes may appear in the diagnostic scans.

6. How do you test an evaporator temperature sensor?

To test the sensor, first disconnect it and measure its resistance with a multimeter at different temperatures. Compare the readings to the manufacturer’s resistance‑temperature chart. You can also monitor the evaporator temperature value in the AC diagnostic data and check whether it changes logically when the system is turned on and off.

7. How do you replace an evaporator temperature sensor?

To replace the sensor, remove or move the dashboard or HVAC cover to access the evaporator area, then disconnect the sensor plug and remove the old sensor. Install the new sensor in the same position, reconnect the connector, and reassemble the interior parts. After installation, test the AC system to confirm normal cooling and no error codes.

8. How much does evaporator temperature sensor replacement cost?

The sensor part itself usually costs between about $20 and $100, depending on the brand and vehicle or system type. Labor can be higher because the evaporator and dash or HVAC housing often need partial disassembly. Total replacement cost commonly ranges around $200–$700, depending on the model, location, and service shop.

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