A dirty air filter can cause restricted airflow through the indoor unit. What this means is that the sensors may try to overcompensate and the machine may work harder.
A dirty air filter can also put pollutant into the filtered air if left to a dangerous state. We recommend cleaning your filters at least once every 3-6 months. This video will show you what exactly to do to clean your filters, it is that simple. Otherwise do not hesitate to call us, we do charge a fee, however we can clean them for you.