Why is it important to do regular cleanings on equipment?
It is recommended to have all air conditioning equipment cleaned twice a year.
If you don’t change/clean the filter, the airflow will go down, and the system will not perform well. Not only that, but if the filter is too dirty, it starts to become a source of air pollution itself. If you take the filter out completely, you would solve the low airflow problem, but this victory would be short lived. The particles that the filter would have taken out will now build up on your evaporator coil and eventually cause it to fail. A new filter is a lot cheaper.