Unit runs but airflow from indoor unit is very weak even at high fan speed.

Safety first: Turn off power before deep cleaning.

• Step 1 – Clean or replace filters: Wash filters thoroughly or replace if damaged.
• Step 2 – Inspect blower wheel: With filters removed, inspect the blower wheel. If the blades are packed with dust, carefully brush and vacuum them.
• Step 3 – Check louvers: Ensure the horizontal and vertical louvers are open and not obstructed by curtains or furniture.
• Step 4 – Check return air: Make sure nothing is blocking the air intake at the top or front of the indoor unit.
• Step 5 – Technician cleaning: For severe contamination, a professional chemical wash of the indoor unit may be required.