a pump for a dishwasher is configured as an impeller pump having a central water inflow to a rotating impeller for conveying the water in the radial direction out of the impeller into a pump chamber which surrounds the impeller in a ring - like manner and has a heated pump chamber wall on its outer side . here , the pump has an outlet in the end region of the pump chamber at an axial spacing from the impeller . heating elements which have a decreasing power output with regard to the area power output in the axial direction of the pump toward the outlet are arranged on the pump chamber wall . an input of energy into the pump chamber can thus be varied and in the process adapted depending on a turbulent or laminar flow .