Completed our annual furnace maintenance, due to systems age we wanted to be thrown in heat exchanger inspection. With the heat exchanger inspection we found minimal rust and minimal concerns. We checked amperage across your inducer motor and your blower motor and readings came out to indicate optimal performance. We checked your flame sensor and cleared off the carbon buildup. We checked your air filter in our recommending within these next weeks, swapping out your air filter to prevent your furnace from overheating. At this time, we have no concerns with the way your system is operating.