Today we visited because the air conditioning system wasn’t working. We learned the unit is 23 years old and uses R-22 refrigerant. The unit cycles on and off with the thermostat, but it is not cooling because it has a refrigerant leak. Marilyn plans to list the home for sale tomorrow and needs the system working. James put together options for complete replacement, all obvious repairs, and a temporary fix to simply add refrigerant. At this time Marilyn decided to: - Recharge the unit with refrigerant While charging the system James noticed the existing washable filter was restricting too much airflow. He informed Marilyn about picking up an inexpensive 20x25x1 filter.