DISHWASHER AND METHOD FOR OPERATING A DISHWASHER

Dishwasher, comprising a washing chamber in which at least one upper basket and at least one lower basket for receiving the washing load are or can be arranged, wherein the upper basket can receive more delicate washing load and the lower basket can receive more stable washing load, further comprising a washing liquid circulation system distributing washing liquid within the washing chamber by means of an upper spray arm and a lower spray arm and having at least one pump for supplying washing liquid to both spray arms and further comprising liquid heating means for heating the washing liquid, such that the washing liquid can be heated up at least to a first temperature T 1 and to a second temperature T 2 , wherein the first temperature T 1 is lower than the second temperature T 2 , and wherein the washing liquid circulation system stops the supply of the washing liquid to the upper spray arm when the washing liquid temperature exceeds the first temperature T 1.