Preformed heat maintenance on a single 2017 gas system. I tested all electrical components and safeties on the inside unit. All tested within manufacturer specifications. Client did not need filter changed at this time. 20x25x4. I proceeded outside to visually inspect the outdoor unit. When I was inspecting the unit I noticed that it did not have surge protection on the system. I provided estimate for installing a surge protector on the unit. Unit was cooling upon departure.
