What are the reasons for the Nissan Sylphy Classic's AC not cooling?

1 Answers
ArthurLynn
07/24/25 12:04pm
Here are the reasons why the Nissan Sylphy Classic's AC is not cooling: 1. Air filter: A dirty air filter reduces airflow and decreases AC efficiency; 2. Compressor: Insufficient refrigerant in the compressor. Cars older than 5 years should have their compressor refrigerant checked promptly; 3. Radiator and condenser: Poor heat dissipation from a dirty radiator or condenser can cause engine overheating. Below are four common reasons for a car AC not cooling: 1. Long-term use of external circulation: External circulation draws in hot outside air through the condenser, while internal circulation recirculates the inside air. Prolonged use of external circulation reduces cooling efficiency compared to internal circulation. 2. Dirty air filter reducing airflow: The air filter blocks impurities in the AC system. Over time, it can get clogged with dust, pollen, leaves, or insects, reducing airflow and AC performance, and possibly causing odors. 3. Insufficient compressor refrigerant: If the above issues are ruled out, check if the compressor lacks refrigerant, especially in cars older than 5 years. 4. Poor heat dissipation: The radiator and condenser are crucial for heat dissipation. If they are too dirty, it can lead to engine overheating and directly impact AC cooling performance.
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