I performed a comprehensive furnace maintenance and inspection. The flame sensor was meticulously cleaned, and the entire furnace was wiped down to ensure cleanliness. I tested all components and measured the amp draws to confirm proper operation. Airflow and temperature splits were checked to ensure efficiency. The customer reported a gas smell, which the gas company attributed to the furnace exhaust. I observed the gas valve opening and closing to verify its proper function, confirming it was operating correctly. The furnace was running within specifications at the time of departure. Additionally, I renewed the customer's club membership during the visit.