Sensors

Category Overview

Air conditioner sensors act as the "sense organs" of split and VRF systems. They measure the room temperature and the evaporator and condenser pipe temperatures in real time and send the data to the main control board electronics; the compressor run time, fan speed and defrost cycle are determined by this data. If an NTC thermistor with the correct kΩ value and correct probe type is not selected, the air conditioner reads the wrong temperature, keeps stopping and starting, or goes into fault with sensor error codes such as E1, E2 or E5. The Yedepa.com Sensors category brings together the room and pipe thermistors that technicians and service companies need most often in the field; with original-equivalent parts it lowers the repair cost and shortens installation time.

Products You Can Find in This Category

The category includes NTC sensor types with different resistance values and different probe materials. Copper-probe models are generally used on the pipe, while plastic-probe models are preferred for the room reading inside the indoor unit. Featured products in stock:

• Air Conditioner Copper-Probe Room Sensor NTC - 50kΩ — high resistance, used for the room reading in most upper-segment indoor units.
• Air Conditioner Plastic-Probe Room Sensor NTC - 10 kΩ — the most common value; the standard replacement for mono split indoor units.
• Gree 47cm Dual-Probe Air Conditioner Sensor, Room and Pipe Thermistor (15K + 20K) — a combined probe for Gree and equivalent brands that measures both room and pipe temperature from a single connector.
• Air Conditioner Copper-Probe Room Sensor NTC - 10 kΩ — clipped to the pipe line to read the evaporator/condenser temperature.
• Air Conditioner Plastic-Probe Room Sensor NTC - 5 kΩ — a low-resistance model used in some older series and certain boards of Chinese origin.

Selection Criteria and Tips

Three parameters are decisive in sensor selection: resistance value (kΩ), probe type and cable length. The wrong kΩ value (for example fitting 5 kΩ instead of 10 kΩ) causes the air conditioner main board to read the temperature with an 8-12°C deviation and the compressor to cut in and out at the wrong time. A copper probe speeds up heat transfer from the pipe surface, so it is critical for defrost and overheating protection; a plastic probe reads the air temperature inside the indoor unit and is not fitted directly to the pipe. In dual-probe combo sensors (such as 15K + 20K), the two thermistors are combined in a single connector, so the cable length and colour code must also match. For fault diagnosis, measuring the sensor with a multimeter at room temperature (a 10 kΩ NTC should read approximately 10 kΩ at ~25°C) is a fast and reliable verification method.

Sensors at Yedepa.com

Yedepa.com does not just sell products in the air conditioner spare parts category; it aims to deliver the right part with the right description to technicians and service companies who have spent years in the field. All NTC thermistors in the Sensors category are listed in stock, the resistance value and probe type are clearly stated in the title, and equivalent-use information is shared in the descriptions. Pricing support is offered on bulk purchases for dealers and service companies. If you are unsure which sensor is suitable based on the air conditioner brand, model or error code, you can reach our technical support team via the Yedepa customer line and request a quick match using a photo or an image of the connector.