Air filters play an essential role in a home's air conditioning system. Air filters help to keep the air clean and clear of dust, pollen, and allergies. To make sure your air filter is working properly and not blocked by dirt or debris, remember to inspect it regularly. Figuring out how often you should check your air filter depends on the type of filter, how much you use your air conditioner, and what the manufacturer recommends.
An overall rule of thumb: For disposable filters, it is recommended to check them at least once a month and replace them when they become dirty or clogged. If you have a reusable filter, then it should be checked every few months, depending on the type and manufacturer.