Arrived to do a maintenance on a York system vertical in the garage. I cleaned and flushed the drain line with water and cleaner. I checked the electrical system. I changed the filter, 20x20x4. I cleaned the evaporator coil with green cleaner. The system is working great at this time. Thanks for using air now for all your air conditioning needs. Arrived to do a maintenance on a York system vertical in the garage. I cleaned and flushed the drain line with water and cleaner. I checked the electrical system. I changed the filter, 20x20x4. I cleaned the evaporator coil with green cleaner. The system is working great at this time. Thanks for using air now for all your air conditioning needs.