Common causes of air conditioner failure include lack of maintenance, dirty air filters, refrigerant leaks, electrical issues, thermostat problems, and compressor failures. These issues can lead to reduced cooling efficiency, increased energy consumption, and even complete system breakdowns. Regular maintenance and prompt repairs can help prevent these issues and extend the lifespan of your air conditioner. So if you want to know more about why is ac running but not cooling, then must read our blog post.