Performed AC cool check and 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. I did find a dead bird inside the furnace. I removed it and checked for how it may have gotten into the furnace. I couldn’t find anywhere the bird could have gotten inside. The air filter was replaced with a client supplied filter. The condenser coil was cleaned. No major issues were found. The system was running at the completion of service.