Compare the temperature sensor characteristic curve or characteristic value table to determine whether it is normal. When the temperature sensor is aging, the characteristic drifts, that is, the corresponding relationship between temperature and resistance value changes, a new temperature sensor should be replaced. Electronic temperature controllers or fully intelligent air conditioners use temperature sensors as temperature sensor components.

A temperature sensor is a component whose resistance changes significantly with temperature. The temperature sensor used to measure the air supply temperature of an air conditioner generally has a negative temperature coefficient: the resistance decreases with increasing temperature. When it comes to temperature sensors used in certain types of air conditioners, the characteristics of its resistance changing with temperature are usually made into a data chart in any specification for inspection.During the inspection, measurements can be performed using a semiconductor thermometer and a digital multimeter in a certain environment.

If it is blocked, it may be that the temperature sensor agent is leaking. Whether it is leaking can be checked mainly by appearance inspection, such as whether the ultrasonic mold of the temperature sensor head is broken, whether the temperature sensor package has damage and cracks, whether the temperature sensor tube has bending marks, etc. Then put the temperature sensor package in 30-40°C warm water to check whether the contact point is closed. If the contact point is still not closed.