Tune up completed on 2 systems. Replaced (2) 20x25x4 filters provided by homeowner. Found upstairs and main floor systems both have dirty blower wheels when blower wheels get dirty it can effect airflow and indoor air quality, furnaces are from 2002. UV bulbs on both systems have gone out will need to reach out to manufacturer to give quote on replacing bulbs. Both outdoor condensers are dirty doesn’t seem to affect refrigerant pressures but as coils get dirtier they will cause the system to become less efficient. Recommend becoming a member due to members get outdoor coils cleaned during AC maintenance. Main floor condenser unit was not grounded due to ground wire not reaching ground terminal. Used screw to ground system to outdoor cabinet, ground will work this way but if homeowner wants it in code he will have to get a new whip that will reach the ground terminal. Both systems are functional and refrigerant pressures and temperatures are appropriate for indoor and outdoor weather co