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LEMON BLOG

How to Set the KIA Optima (2004–2008) Air Conditioning to Use Internal Airflow by Default on Engine Start

If you own a KIA Optima manufactured between 2004 and 2008, you might have noticed that the air conditioning system doesn't always remember your last setting for internal air circulation. This can be annoying, especially if you prefer the cabin to recirculate air by default when starting the engine—particularly in hot, dusty, or polluted environments.

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