How to Measure the Evaporator Temperature Sensor?

1 Answers
JocelynAnn
07/25/25 4:47am
Evaporator temperature sensor measurement method: Place the evaporator temperature sensor in cold water with ice cubes. While changing the water temperature, measure the resistance value at both ends of the connector. At the same time, use a thermometer to measure the water temperature. As the water temperature rises, the resistance value gradually decreases, and the current passing through becomes smaller, indicating that the evaporator temperature sensor is functioning properly. If the resistance value remains unchanged or increases, it indicates that the sensor's performance no longer meets the requirements and should be replaced. The function of the evaporator temperature sensor is to detect the temperature of the evaporator and regulate the operating time of the air conditioning system. Typically, after turning on the air conditioning, the evaporator continuously cools until the temperature reaches the set value, at which point a signal is sent to stop the compressor.
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