What Causes a Car Air Conditioner to Not Cool?

1 Answers
McMaya
07/29/25 11:38am
Car air conditioner not cooling can be caused by refrigerant issues, clogged filters, or saturated dryer tanks. Below is a detailed explanation of why a car air conditioner may not cool: Refrigerant Issues: Sometimes, the reason a car air conditioner does not cool is due to problems with the refrigerant in the air conditioning system. Clogged Filters: At times, excessive impurities in the refrigerant or the presence of too much debris in the refrigeration oil can clog the filter screen, reducing cooling efficiency. This increases resistance and decreases the flow of refrigerant to the expansion valve, resulting in the air conditioner not cooling. Saturated Dryer Tank: The car air conditioning system includes a dryer tank, whose main function is to absorb moisture from the refrigerant and prevent excessive moisture from reducing cooling capacity. When the desiccant in the dryer tank becomes saturated, it can no longer filter out moisture.
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