Fisher & Paykel DishDrawer: field service manual

Start: the user closes the drawer and presses Start. The control drives the lid motors (one each side) to pull the lid down onto the tub rim. If the lid cannot seal (broken link support caught under it, worn lid motor, tall item in the rack), water can escape during wash and set the flood code.

Fill: water enters through a dual fill valve at the back of the cabinet (one solenoid per drawer on double units) and travels along the drawer's fill hose. On some generations the fill hose is routed to the detergent dispenser at the front of the drawer.

Wash: a direct-drive wash motor sits in the bottom of the tub. The rotor/impeller sits inside the tub under the filter plate and the stator is below. Debris or glass in the rotor cavity stops it and sets F2.

Heat: the heater is part of the tub base. Service literature for the classic DD603 era describes an enamelled steel plate with a thick-film element printed on its dry side. A temperature sensor monitors wash water. Inlet water above about 65 °C / 149 °F can trigger the temperature code (F3), and Fisher & Paykel suggests a tempering valve in that case.

Drain: a drain pump pushes water out through the drain hose. The hose has a flap (non-return) valve at its connection. Replacement hoses may be supplied without it, so move the valve across from the old hose.

Flood protection: a sensor on the flood/mains filter board in the base detects water. On some generations this board also drives the lid motors, so a board fault can show up as a lid problem. Scale build-up around the flood sensor has been reported to cause nuisance flood codes.

Two drawers, two controls: on double units each drawer keeps its own codes. A fault in one drawer can make the other display a 'fault in other drawer' code (U4), so always read both drawers before diagnosing.