Indoor unit runs but airflow is very weak even at high fan speed.

Safety: Turn off power before cleaning or touching the blower.

Steps:

• Clean filters: Wash and dry filters thoroughly.
• Inspect coil: Look at the evaporator coil behind the filters. If heavily dust-laden, gently vacuum or use a coil cleaner.
• Check fan speed setting: Ensure the remote is set to HIGH fan, not LOW or QUIET mode.
• Inspect blower wheel: If accessible, check for heavy dust buildup on the blower blades and clean carefully.

Technician recommended: If airflow remains weak, the indoor fan motor may be failing or the coil may need professional cleaning.