The following are some of the most common seasonal maintenance tasks: - Cleaning. This includes vacuuming the blower compartment, wiping down all surfaces, and cleaning the air filter. If your system has a condenser unit (the part that cools the air), it should be wiped down as well. - Testing. This is where you check for leaks from refrigerant lines, motors, or any other part of your HVAC system that could cause problems later on if not addressed now. You should also test for proper airflow throughout each room in which you want to use your HVAC system so that temperatures remain consistent throughout each room at all times during summer months when cooling needs are greatest; this way, you won’t have to spend a fortune on energy bills just because one area isn’t getting enough cool air!