Performed A/C tune up. Checked all electrical, mechanical and performance of the system. Cleared and treated the drain line and washed the outdoor coil. Customer bought 2 perfect fit filters. I replaced one and she has an extra one for our next visit. The outdoor temperature is 48 degrees, so I did run the system in heating mode to check refrigerant levels. No major issues were found, and the system is operational at this time. Please see attached checklist for full tune-up details.