I am a home service technician, and I recently completed a furnace maintenance job. The furnace was inspected and tested to ensure it was operating at peak efficiency. The flame sensor was cleaned to remove carbon buildup, and the amp draw of the blower and inducer motor was measured to ensure they were operating within acceptable parameters. I also checked the electrical connections and replaced any worn or damaged parts. Finally, I performed a thorough cleaning of the furnace and surrounding areas to ensure that it was in good working condition.