Dispatched to perform a complete furnace tune-up to ensure safe, efficient, and reliable operation for the heating season. Upon arrival, the system was powered down and a full inspection was completed in accordance with manufacturer specifications and industry best practices. The furnace cabinet and internal components were inspected for signs of wear, overheating, corrosion, or water damage. Burners were checked for proper ignition and flame pattern to ensure safe combustion. The flame sensor and igniter were inspected to promote reliable startup and prevent nuisance shutdowns. All safety controls were tested, including limit switches, pressure switches, and rollout protection, to confirm the furnace will shut down properly under unsafe conditions. Electrical components, wiring connections, and voltage readings were inspected to verify safe and proper operation. The blower assembly was evaluated for airflow, balance, and amperage draw to ensure efficient air delivery throughout th