Water leaking from air handler. Found float switch lifted up and not able to catch water to shut system down. Drain line is severely clogged and there is biological growth build up inside air handler. Existing UV light is burnt out. Advised client to have drain line flushed out and cleaned, install an in-line drain cleaner, and replace bold UV light with a newer updated version. Client agreed to recommendations. Cleaned out and flushed drain line, installed in-line drain cleaner, and replaced UV lamp system. Cycled and tested system, checked refrigerant pressures. All operations OK at this time.