Replace Your Filters Regularly: One of the simplest and most effective ways of keeping your air conditioner working properly at all times is to keep the filters on it clean. Depending on the specific air conditioner that you have and the amount that you use it, the frequency with which you will need to replace your filters can vary greatly. However, it is generally recommended that you replace your air filter at least once every few months. This is a great way to keep your air conditioning running efficiently while also keeping the air quality in your space as high as possible.