An air conditioning system does more than just pump cold air into your home. Many systems contribute to purifying your air quality. As the air is moved through the system and into the home, it passes through a filtration system. When the system doesn't receive regular cleanings or maintenance, those filters begin to fill up. The more they filter out, the more that junk stays inside the system. Eventually, so much build-up can accumulate and malfunction the system. A dirty air filter can do the opposite of its intended purpose by putting contaminants in the air. An AC repair service will make sure all filters look clean and clear to allow for better air to enter the house.