What Causes Poor Air Conditioning Cooling in Civic?

[DiCaden]

Civic's air conditioning may have poor cooling performance due to the following reasons: 1. Prolonged use of external air circulation: Some cooling issues stem from incorrect AC usage habits, such as running the AC while keeping the external air circulation on continuously. Using AC with external circulation essentially draws hot outside air into the cabin, naturally reducing cooling efficiency. During hot weather, it's advisable to switch back to internal circulation shortly after ventilating with external air. However, don't maintain internal circulation indefinitely either, as prolonged lack of air exchange may lead to carbon monoxide buildup. The best practice is to alternate between internal and external circulation. 2. Cabin air filter: The cabin air filter's function is to trap impurities from outside air, such as dust and pollen. With extended AC operation, the filter inevitably accumulates a thick layer of debris. Failure to replace or thoroughly clean it will result in reduced airflow and diminished cooling performance. It's recommended to replace or clean the filter during every vehicle maintenance service.