Performed heater check. Checked the electrical, mechanical, safety, and performance of the system. I cleared the drain line and flow tested the drain with two gallons of water. I also treated the drain line. The air filter was replaced with a customer supplied filter. The system does have high static pressure of .63 inches of water column. I spoke with the homeowner about the high static pressure and its effects on the system. No other major issues were found. The system was running at the completion of service. See attached checklist for full tune-up details.