Tall Fisher & Paykel Dishwasher Won’t Drain: Beyond the Filter

Tall tub Fisher & Paykel dishwashers share the same end goal as a DishDrawer—empty the sump—but the plumbing layout and access points differ.

If the bottom of the tub holds cloudy water after every cycle, start with filtration, then move to the air gap, garbage disposal connection, and pump.

Filter Stack and Chopper Area

Remove and rinse the cylindrical and flat filters. Food wrap and glass can lodge where you cannot see without a light. Reassemble exactly as designed; a misaligned filter often returns as a drain complaint.

External Drain Path

Check the sink air gap cap for sludge, run the disposal with water if the dishwasher tees into it, and confirm the drain hose is not folded behind the machine.

• Clean filters monthly in busy kitchens.
• Clear the air gap if your install uses one.
• Avoid stuffing large utensils against the lower spray arm.
• Note any new plumbing work that coincides with the problem.

When the Pump Needs Testing

A drain motor that buzzes, a check valve stuck open that lets sink water backflow, or a control that never energizes drain mode requires instruments. Bail the tub first so the technician starts dry.

Safety note: Pull the plug or open the dishwasher breaker before removing toe panels. Do not put hands near the chopper while power is present.

Preventing Repeat Standing Water

Scrape plates, keep the filter schedule honest, and use the soil sensor cycles as intended rather than forever selecting the shortest wash to save time.

Frequently Asked Questions

Is backflow from the sink a dishwasher fault?

It can be a shared drain issue. If sink water appears in the dishwasher, the high loop or air gap may be wrong.

Do I need a new dishwasher if it will not drain?

Usually not. Pumps, hoses, and filters solve most cases when the tub and cabinet are otherwise sound.

Why does drainage fail only on heavy soil cycles?

Heavier soil loads send more debris into the sump. A borderline filter or pump impeller shows up first on those programs.

Still stuck with a wet tub? See our repair services or tell us what you already cleaned so the visit starts further down the list.