Why is my AC not cooling, cooling slowly, or giving weak airflow?

Start with the filter — a clogged filter is the single most common cause of all three symptoms, and it's something you can check and clean yourself in a few minutes. If the filter's clean and airflow is still weak, check that nothing's blocking the outdoor unit's airflow outside. If cooling is still poor after that, it likely needs a technician — don't attempt to check refrigerant levels yourself, since handling refrigerant requires certification.

📐 Calculated estimate Based on real BEE-certified data — see the exact numbers below.

These three symptoms usually share the same root causes, which is why we're answering them together rather than as separate problems. A dirty filter restricts airflow across the coil, which shows up as weak airflow, slower cooling, or both — cleaning it resolves a genuinely large share of "my AC isn't cooling well" complaints without needing a service call at all. If cleaning the filter doesn't help, that's the point to stop self-diagnosing and book a technician, since the remaining likely causes (low refrigerant, compressor issues) aren't safe or effective to check yourself.