Poor cooling performance: the room does not reach the set temperature, run times are long, and the air is weakly cold.

Safety first: Turn off the power before cleaning coils or filters.

• Step 1 – Clean indoor filters and coil: Wash the filters and gently clean the evaporator fins with a soft brush or coil cleaner.
• Step 2 – Clean outdoor condenser: Remove debris and wash the fins from the inside out with low-pressure water.
• Step 3 – Check temperature settings: Set the thermostat to 22–24°C in COOL mode and medium fan speed. Ensure doors and windows are closed.
• Step 4 – Check for heat sources: Reduce internal heat loads (sunlight, ovens, many people) that may exceed the unit’s capacity.

When to call a technician: If performance remains poor after cleaning and optimizing usage, a refrigerant leak or mechanical fault is likely and requires professional service.