Tested drainrun from cleanout with 1 gal water, extent of drain working well Found high water in pan of unit, with algae build up preventing water from draining out of pan. Vacumed drain so as to clear first 6" of pipe and vacumed pan abap, treated pan and evap coil with peroxide Advised daughter on measures of continued treatment with peroxide. Filter needs replaced asap and continue changes monthly treated as recall for today