Regularly checking and replacing the air filter helps keep the indoor coil clean and extends the life of the AC system. The rate of filter replacement may vary depending on factors like pets, humidity, home size, and climate. It is recommended to check and replace the air filter every few months. Getting seasonal tune-ups can catch small problems early before they become more serious and costly issues. Tune-ups check that the drain is clear, Freon levels are normal, components are in good shape and secured properly. Performing maintenance raises efficiency, reduces energy usage, and lengthens the life of the air conditioner.