Renew 2 Comfort Club Memerbship plans and perform 2 a/c repair and preventative maintenance checks. Found two2 2-year-old a/c units operating normally. Did not change the filters, checked drains and cleaned a/c coils. Note: customer said intermittently master bedroom makes a loud noise from vent due to strong air flow. Checked for the customer but did not detect problem for today visit. Both system operating at this time. Suggest installing hard start kit to improve start-up and reduce the load to prolong system.