Performed a three system cooling maintenance on two 2022 Carrier’s & one 2002 Carrier the ODT is 66°.Upon arrival tested operation of equipment confirming they were operational.Once operation was confirmed began evaluation on equipment there are six 16x25x2 which were gently used each filter was replaced on this visit along with there is one A36 belt which was worn the belt was replaced on this visit.Blower motor was fully operational not showing any signs of being intermittent or dropping out.Inspected blower wheel on each system finding RTU #2 to be dirty when a blower wheel gets dirty it minimizes the efficiency of equipment along with places a strain on parts and equipment unfortunately due to age do not recommend having performed due to being high risk for failure.Inspected evaporator coil on each system finding RTU #2 to have minimum build up.Tested capacitor on RTU #2 finding it to be extremely weakened if worsened will cause loss of ability to cool/heat a quote has been provide