One of the biggest issues with the outdated and old air conditioner is that it can harm the indoor air quality of a property. Besides, things like dust, pollen, pet dander, and other harmful particles can develop in the system. And when you switch on the AC, these things get released to the air supply and cause different symptoms. In this case, professional AC servicing can help to get rid of the issue by checking the air filter and removing the debris buildup.