A washing appliance has a hydraulic circuit including a tank for storing a predetermined amount of liquid, and a heating element inside the tank. The heating element heats the liquid to a predetermined temperature. A water inlet receives water from a water supply network. A descaling apparatus includes a descaler chamber having a housing portion housing a descaler product container containing a descaling agent and a mixing portion containing a mix of water and a predetermined amount of the descaling agent. The housing portion is fluidly connected to the mixing portion and an inlet pipe fluidly connecting a water inlet to the descaler chamber. The descaling apparatus also includes an outlet pipe that drains the mix of water and descaling agent from the mixing portion and provides it to the tank and a spraying element in the mixing portion that sprays water from the inlet pipe towards the housing portion.

A method of operating a dishwasher having a pump and filter assembly including an impeller adapted to recirculate liquid, a housing defining an interior and exterior, a rotating filter to effect a filtering of the liquid, and a granular agent supply with granular agent cleaning the filter by scouring the filter.

A cleaner cartridge for a household dishwasher includes active substances for cleaning items to be washed and/or the household dishwasher. A first chamber of the cleaner cartridge accommodates one of the active substances at an amount sufficient for a number of wash cycles, and a second chamber of the cleaner cartridge accommodates one of the active substances at an amount sufficient for only one wash cycle.

A pump and filter assembly including an impeller adapted to recirculate liquid, a housing defining an interior and exterior, a rotating filter having an upstream surface and a downstream surface, the filter located within the interior such that liquid being pumped through the pump and filter assembly passes through the filter from the upstream surface to the downstream surface to effect a filtering of the liquid, and a granular agent supply with granular agent cleaning the rotating filter by scouring the filter.

A pump and filter assembly including an impeller adapted to recirculate liquid, a housing defining an interior and exterior, a rotating filter having an upstream surface and a downstream surface, the filter located within the interior such that liquid being pumped through the pump and filter assembly passes through the filter from the upstream surface to the downstream surface to effect a filtering of the liquid, and a granular agent supply with granular agent cleaning the rotating filter by scouring the filter.

A dishwasher with a tub at least partially defining a washing chamber, a liquid spraying system, a liquid recirculation circuit, and a liquid filtering system where the liquid filtering system includes a rotating filter and where a granular agent contacts the rotating filter to clean the filter. Methods of cleaning a rotating filter provided within a liquid flow by scouring the filter with a granular agent.

A dishwasher with a tub at least partially defining a washing chamber, a liquid spraying system, a liquid recirculation circuit, and a liquid filtering system where the liquid filtering system includes a rotating filter and where a granular agent contacts the rotating filter to clean the filter. Methods of cleaning a rotating filter provided within a liquid flow by scouring the filter with a granular agent.

Disclosed a controlling method of a dishwasher comprising a washing tub defining a washing space in which one or more dishes are loaded and washed; a storage unit in which the dishes are loaded; an injection unit injecting wash water to the dishes; a sump provided in a lower portion of the washing tub; and a driving unit supplying and circulating the wash water stored in the sump to the injection unit, the controlling method for cleaning the washing space comprising: a water supply step for supplying wash water; a preliminary cleaning step for injecting the wash water to the storage unit without the dishes, the washing tub and the injection unit to clean the storage unit, the washing tub and the injection unit; a main cleaning step for injecting the wash water mixed with dishwashing detergent to the storage unit, the washing tub and the injection unit; a rinsing step for rinsing the storage unit, the washing tub and the injecting unit by injecting wash water; and a drying step for drying the storage unit, the washing tub and the injection unit.

The timing of warewash machine delime operations may be set according to one or more of water used in the machine or one or more machine characteristics. A delime process that utilizes intermittent shock delime operations is also provided.

A dishwasher with a tub at least partially defining a washing chamber, a liquid spraying system, a liquid recirculation circuit, and a liquid filtering system where the liquid filtering system includes a rotating filter and where a granular agent contacts the rotating filter to clean the filter. Methods of cleaning a rotating filter provided within a liquid flow by scouring the filter with a granular agent.