Upon inspection, the furnace was found to be in excellent condition, with all components functioning optimally. I thoroughly cleaned and lubricated the moving parts, ensuring smooth operation. The air filters were replaced with high-quality ones to maintain optimal airflow. I also checked the thermostat and electrical connections, confirming they were secure and working correctly. After a comprehensive test run, the furnace operated efficiently, producing consistent and adequate heat. With all checks completed, the furnace is now fully prepared for the upcoming winter season.