Maintenance of cooling fans mainly includes regular cleaning, bearing inspection, and lubrication. Regular cleaning prevents the accumulation of dust and debris, which can affect the fan's cooling performance and lifespan. Bearing inspection helps identify wear and damage early, avoiding fan failure due to bearing issues. Lubrication reduces friction in the bearings, extending the fan's lifespan. Additionally, attention should be paid to the fan's installation and operating environment to avoid the adverse effects of high temperatures, high humidity, and dust.