No cool a/c repair call. Found the upstairs system not operating properly due to low charge. Did leak search but did not detect a leak, found service valve cap missing gasket. Sign up 2 Comfort Club Membership plans and complete 2 a/c repair and preventative maintenance checks. Recharged the upstairs system to manufacture spec and installed compressor hard start kit. Installed compressor hard start kit for the downstairs system. Leave 2 filters for the customer. Cut and install union to drain line, level drain at the outdoor unit and replace service valve cap. Both system operating at this time. Suggest installing additional water safety for drain line due to both systems are in the attic.