I recently completed a comprehensive maintenance service on a six-year-old Lennox gas pack system. The maintenance began with a thorough inspection of the unit, checking for any signs of wear or damage. I cleaned the heat exchanger and inspected the burners for efficiency and proper function. The air filters were replaced to ensure optimal airflow and system performance. I also checked the thermostat and control settings to ensure they were operating correctly. Additionally, I lubricated all moving parts and inspected the flue for blockages or damage. The system was tested for proper operation, and I provided recommendations for future maintenance to ensure longevity and efficiency.