What are the symptoms of a clogged car air conditioning expansion valve?

[StChloe]

When the car air conditioning expansion valve is clogged, it increases the load required for the air conditioning compressor to operate, resulting in the air conditioning producing cool air but no airflow. The expansion valve is a crucial component of the car's cooling system, typically installed between the liquid reservoir and the evaporator. Here is the relevant information: 1. Definition of the expansion valve: The expansion valve allows medium-temperature, high-pressure liquid refrigerant to throttle into low-temperature, low-pressure wet vapor to achieve cooling effects. It controls the valve flow based on temperature changes at the evaporator's end, preventing insufficient utilization of the evaporator's surface area and knocking phenomena. 2. Function of the expansion valve: One is the throttling effect, and the other is controlling the flow of refrigerant. 3. Classification of the expansion valve: Thermal expansion valves can be divided into internal equalization and external equalization types based on the balancing method. In a car's refrigeration system, the expansion valve is one of the four major components, with the other three being the compressor, condenser, and evaporator.