Tested all components all measured within ratings and specs. Refrigerant level is way below normal superheat of 63 and subcool is negative on Txv. Filters were changed recently. Washed and cleaned condenser. After reading gauges moved to indoor unit to rule out any other possible causes determined the evaporator coil is leaking video in hvac form and is in urgent need of repair or replacement. I advised the customer that replacement would be their best option since they have no current warranties. Customer wants to sleep on it and research any possible warranties through install company. Emailed estimates for repair.