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Will a car's air conditioning not cool if the sensor is broken?

1 Answers

MaryLynn

07/30/25 1:07am

The air conditioning can still cool even if the sensor in a small car is broken. Detailed introduction: The air conditioning cooling effect is still good, but the air volume is very small. In this case, replacing the air conditioning filter can solve the problem, as a dirty air conditioning filter prevents fresh air from being blown in. Specific situation: Initially, the air conditioning cooling effect is good, and the air volume is large. However, after driving for a while, the air volume decreases. This may be due to the failure of the air conditioning evaporator temperature sensor. The air conditioning evaporator is where heat exchange occurs. The refrigerant changes from liquid to gas inside the evaporator, and the liquid vaporization absorbs a large amount of heat from the surroundings, causing the evaporator temperature to drop. Outside air passes through the evaporator, and the air temperature decreases. When the evaporator temperature sensor fails, the vehicle's computer cannot control the compressor's start and stop, causing the compressor to keep working. This leads to frost formation on the evaporator, preventing outside air from passing through. As a result, the air volume from the car's air conditioning vents decreases. After the vehicle is turned off for a while, the frost on the evaporator melts, and the cooling effect can be restored. However, after driving for a while, the air volume from the air conditioning vents decreases again. In this case, replacing the evaporator temperature sensor may solve the problem.

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