On arrival, the Côr thermostat had shutoff. Inspected the primary drain system and found that the emergency water safety switch was tripped, turning off power to the cooling system. Removed water from safety device and flushed and treated the primary drain line. Homeowners have extended the drain line from the side of the house to the backyard. I flushed around 8-10 gallons of water to ensure proper drainage of system. Added a drain treatment to the primary drain line and drain pan. Ensured system was operational prior to leaving. Also adjusted thermostat programming to turn off the schedule function. Talked about installing a different thermostat, since the Côr thermostat is not the easiest to use. Everything is working at this time. Walked Mr. Slater through everything I did today and showed him how to properly flush the drain line out since his drainage system is at a longer length.