Performed heat check. Checked the electrical, mechanical, safety, and performance of the system. I cleared the condensation drain line and flow tested the drain with two gallons of water. I also treated the drain line. The air filter was clean and had been recently replaced by the homeowner. Surge protection on the air handler and condenser unit is operational. Refrigerant charge was within factory specifications. Condenser coil cleaned. No major issues were found. The system was running at the completion of service.