Washing appliance with recirculation pump

A washing appliance comprising:

• a tub;
• a circulation pump to circulate a washing fluid in the tub;
• a circulation pump motor to drive the circulation pump;
• a drain pump;
• a detection unit configured to monitor at least one electromechanical parameter of the circulation pump motor, and to detect, based on the monitored at least one electromechanical parameter, a starvation event indicating that air is drawn out by the circulation pump or a saturation event indicating that no air is drawn out by the circulation pump;
• and
• a control unit configured to determine a first starvation event and a second starvation event occurred after the first starvation event,
• wherein the first starvation event is determined when a starvation event is detected after a first number of consecutive saturation events (N1) is counted, or after a first time interval (ΔT1) has elapsed during which no starvation event is detected,
• wherein the second starvation event is determined when a starvation event is detected before a second number of consecutive saturation events (N2) is counted after the first starvation event, or before a second time interval (ΔT2) has elapsed after the first starvation event during which no starvation event is detected, wherein the first number of consecutive saturation events (N1) is higher than the second number of consecutive saturation events (N2) and the first time interval (ΔT1) is higher than the second time interval (ΔT2);
• and wherein the control unit is configured to:
• determine a starvation state of the circulation pump when both the first starvation event and the second starvation event are determined, the starvation state indicating that insufficient washing fluid is present in the tub to prevent air from being drawn out by the circulation pump;
• determine a saturation state of the circulation pump if the second starvation event is not determined, the saturation state indicating that sufficient washing fluid is present in the tub to prevent air from being drawn out by the circulation pump;
• and
• control the washing appliance based on the determined starvation state or saturation state of the circulation pump.