Found Electric Steamer unit off. Turned unit on allowed to fill. Turned heat on found once unit started building pressure the unit would drain all the water to the point of tripping low level light. Checked drain valve found piece of debris was blocking valve from shutting all the way. Cleaned out valve reinstalled valve. Turned unit on let fill and let unit heat. Found unit to fill normally, heat, build pressure and steam each compartment and cycle appropriately. Turned unit off to verified drain valve operated. Turned unit on and let unit run normally for about 10 minutes. Unit is operating correctly at this time. Turned unit off and allowed to drain.