Furnace precision tune up; clean and tune up furnace; clean burners, test ignition components, adjust gas level, test safety circuit, check indoor motors, checked all electrical components, tested indoor air flow, checked heating temperatures, and tested overall furnace operation. Recommended Surge protector to prevent power surge and damage the electrical components and replacing the UV bulb. All recommendations has been declined as of now. Homeowner was wonder why the Furnace outlet is GFCI and why it trips often in the winter, It was code, we had to install it GFCI to pass inspection. It’s required for MN. Homeowner would need to reset when it does trip.