I am a skilled professional that works for a Dor-Mar Heating & Air Conditioning company. I recently completed a job that involved performing ac maintenance. I started by checking the system for any issues and then completed a maintenance checklist. I also replaced the air filter and cleaned the evaporator coil. I also checked the refrigerant levels and made sure the system was operating at peak efficiency. I also tested the thermostat and made any necessary adjustments. Finally, I cleaned the condenser coil and checked the condensate drain.