Indoor unit shows E24; the unit may stop after running for some time.

Safety: Turn off the unit before cleaning.

Steps:

• 1. Clean filters: Remove and wash indoor air filters with mild detergent. Dry completely before reinstalling.
• 2. Clean the evaporator coil: Use a soft brush or coil cleaner to remove dust from the indoor coil fins.
• 3. Check fan speed: Run the unit and verify that airflow is strong at all fan settings. Weak airflow may indicate a failing fan motor.
• 4. Observe for ice: If ice forms on the coil, turn off the unit and allow it to thaw. Persistent icing suggests low refrigerant or airflow issues, requiring a technician.