I performed a single system maintenance on a 2019 propane furnace. I checked amps, filter, electrical, safeties, and cleanliness. I noticed that there was some loose wires at the control board. I tightened them to ensure clean connections. I observed that the blower wheel as a bit of build up present, the emergency pan is still is a condition where replacement is suggested, and the units did not have surge protection. I presented solutions for these issues/concerns/preventative measures during the time of service.