No cooling, found float switch, tripped due to clogged drain. Upon inspection of system found air filter very dirty, blower wheel and evaporator coil are impacted in biological growth, there is no cleanout port on drain line, and a lot of sediment and sludge buildup in drain pan and drain line. Gave client solutions for issues with the system And offered membership. Client chose to go with minimum option. Installed clean out port on drain line and flushed out drain. Tested AC and drain, all operations OK at this time. Left filter out of system due to it being very dirty, informed client that they need to replace air filter ASAP.