Heating tune up performed today on an Amana gas furnace with straight cool condenser installed in 2021. All electrical connections are tight with no corrosion. X13 blower motor is clean and working as it should. Evaporator coil is clean. Burners, gas valve and heat exchanger are all acceptable. Gas pressure is in range. All safeties are working properly. Air filter was changed. System operating properly at time of departure.