Washer such as a dishwasher or a washing machine and method for operating a washer

A method for operating a washer which comprises a water tank that is detachably formed with the washer, wherein the water tank has a volume corresponding essentially to the amount of water required for executing a single program cycle, a washing chamber for accommodating goods to be cleaned, said washing chamber having in its lower portion a sump for collecting water during operation of the washer, a water inlet for feeding water from the water tank into the sump, a circulating pump for circulating water through the washing chamber, and a control unit for controlling a washing cycle carried out by the washer, in which method in subsequent steps :

• water is fed from the tank into the sump by the action of the hydrostatic pressure prevailing within the water tank;
• the pressure within an inlet or outlet conduit of the circulating pump is measured by a pressure sensor;
• and
• based on the pressure measurement, cause completion of an action based on signals received from the pressure sensor, the action comprising at least one of:
• controlling at least one parameter and/or step of the washing cycle, terminating the washing cycle, or issuing an indicator signal to a user of the washer.