Single system Spring/ Fall Maintenance. Completed the HVAC heating and cooling inspection checklist. I ran the system in heat and cooling for 30 minutes and the system is operating according to specifications. I flushed the drain line with two gallons of water. I added drain cleaning tablets and endure to the system to assure it’s draining properly. Please refer to my Inspection checklist for more details. The customer accepted option A so we completed all sold work. We ran the system for 30 minutes and the system is working according to specifications.