Why is my Haier HSU-24HEA03 Air Conditioner not cooling well?
- DDiane HillAug 14, 2025
Several factors can cause poor cooling. Check if the air filter is dirty and clean it, normally every 15 days. Ensure there are no obstructions blocking the inlet and outlet. Verify that the temperature is set correctly. Make sure all doors and windows are closed. Block any direct sunlight with curtains. Reduce heat sources or the number of people in the room during cooling.