There can be many reasons for the inability of the aircon to provide efficient cooling. Some of these reasons include:
• Windows and doors might not be closed properly
• Outdoor condenser or indoor fan coil is not clean
• The temperature of the aircon can be too high
• Some parts of the aircon may be faulty
• There might be insufficient refrigerant in the aircon system
• The aircon’s size must be too small for the entire room