Disclosed is a cup washer. The cup washer of the present disclosure includes an additive storage part and an additive supply part. The additive storage part is configured to store an additive in a storage space. The additive supply part is configured to supply the additive into the tub. The additive supply part includes an additive pump and a first additive supply pipe. The additive pump is located below the additive storage part. The first additive supply pipe connects the lower portion of the additive storage part to the inlet of the additive pump. The first additive supply pipe is configured to provide a first supply passage through which the additive of the additive storage part moves toward the inlet of the additive pump. The first additive supply pipe and the inlet are connected to each other at a predetermined angle.

A dishwasher appliance includes a door pivotally mounted to a cabinet to provide selective access to a wash chamber, a dispensing assembly including a dispenser cup, a dispenser door for providing selective access to the dispenser cup, and an actuating mechanism for moving the dispenser door from a closed position to an open position, and a magnetic sensing assembly operably coupled to the dispensing assembly. A controller is configured to energize the actuating mechanism, obtain a signal from the magnetic sensing assembly, determine that the dispensing assembly has malfunctioned based on the signal from the magnetic sensing assembly, and implement a responsive action in response to determining that the dispensing assembly has malfunctioned.

A dishwasher appliance includes a door pivotally mounted to a cabinet to provide selective access to a wash chamber, a dispensing assembly including a dispenser cup, a dispenser door for providing selective access to the dispenser cup, and an actuating mechanism for moving the dispenser door from a closed position to an open position, and a photo-interrupter assembly operably coupled to the dispensing assembly. A controller is configured to energize the actuating mechanism, obtain a signal from the photo-interrupter assembly, determine that the dispensing assembly has malfunctioned based on the signal from the photo-interrupter assembly, and implement a responsive action in response to determining that the dispensing assembly has malfunctioned.

A dishwasher appliance includes a door pivotally mounted to a cabinet to provide selective access to a wash chamber, a dispensing assembly including a dispenser cup, a dispenser door for providing selective access to the dispenser cup, and an actuating mechanism for moving the dispenser door from a closed position to an open position, and an optical sensing assembly operably coupled to the dispensing assembly. A controller is configured to energize the actuating mechanism, obtain a signal from the optical sensing assembly, determine that the dispensing assembly has malfunctioned based on the signal from the optical sensing assembly, and implement a responsive action in response to determining that the dispensing assembly has malfunctioned.