Water leaking out from drain pan to air filter and floor underneath air handler. Found drain line backed up and float, which is not shutting system off. Float switch is faulty in will be replaced under warranty. There are still some major issues with system. Drain line is extremely backed up, evaporator coil is covered in biological growth and animal hair, system needs UV lights and air purification. Gave client solutions for issues with system. Client chose solution number one. We are returning tomorrow afternoon, May 8 to pull in cleaning evaporator coil, clean, and flush out drain,Install air purifier, and two UV lights. Client got approved for full amount on financing.