Two system super tune up performed today. All electrical connections are tight with no corrosion. Both blower motors are working properly. Systems are clean. Heat exchangers, gas valves and burners are all working accordingly. Outdoor units were washed and waxed. The expansion valve on the smaller bedroom unit is failing. Bulb is not sensing temperatures and valve is not opening and closing as it should. Highly suggest replacing. Neither unit had drain protection n suggest adding a drain safety switch to each unit to prevent water damage in the home.