Observe the functionality & appearance of the electric fan

Does it require cleaning?

Disassemble parts (make sure to take note of assembly process) & clean each part according to proper protocol

Is the fan lacking in functionality? (weak airflow)

Check each part of the electric fan (buttons, blades, motor, wiring connections, knobs that keep the blades in place)

Is there any damaged parts?

Replace parts (find a shop that sells the parts & make sure of the specifications of the parts, bring said parts if needed)