The short answer
A Cafe integrated dishwasher holding water usually has a blocked sump filter or a drain connection at the sink that is restricted. Check both before anyone pulls the machine out. A new disposer with an unremoved knockout plug is a classic cause. The drain pump is last and is behind the panel.
What you observe
- Water standing in the sump at the end of a cycle — The classic drainage signature.
- The machine hums during the drain with no flow — The pump is powered and working against a blockage.
- Water backing up into the sink when it drains — The sink waste rather than the dishwasher.
- It drains slowly and dishes stay wet — A partial restriction affects both.
- NEAR MISS - a film of water under the filter — Normal on many machines between cycles.
Causes, most likely first on this brand
- A blocked sump filter — First and easiest. Debris in the filter and the sump beneath it restricts the drain path before the pump even sees it.
- A restricted drain connection at the sink — Second. The hose ends at a sink waste, a trap spigot or a disposer, and a blocked trap or a greased spigot stops the machine emptying however well the pump works.
- A disposer knockout plug left in place — Third, and a classic. When a dishwasher is connected to a new disposer the internal plug must be knocked out, and if it is not, the machine can never drain at all.
- A kinked or badly routed drain hose — Fourth. Behind cabinetry the hose can be crushed against a cabinet side or lose its high loop, either of which stops or siphons the drain.
- A blocked or failed drain pump — Last. A hum with no flow points this way once everything upstream is clear, and on an integrated machine it means drawing the unit out.
Check in this order, and why
- Listen during the drain phase — A hum means powered and blocked; silence means the pump is not running.
- Remove the filter and clear the sump — The one part of the drain path you can reach easily.
- Check the sink waste and the disposer — Run the disposer and the tap; a slow sink is your answer.
- Ask whether a disposer was fitted recently — A knockout plug left in is a complete blockage.
What an owner can safely check
- Bail the standing water out of the sump — Use a cup and a cloth so you can see what you are working on.
Tools: cup, towelsAbout 20 min
- Remove and wash the filter and clear the sump — Look for glass, seeds and labels in the recess beneath it.
Tools: brush, glovesAbout 25 min
- Clear the sink trap and run the disposer — Test the sink drains freely on its own before blaming the machine.
About 25 min
- Check the drain connection and knockout plug — If a disposer was fitted recently, confirm the plug was removed.
Tools: torchAbout 20 min
- STOP HERE if the pump hums with a clear path — That means drawing the machine out.
Before you open anything
Safety
Switch the dishwasher off at its breaker before reaching into the sump - a capacitor can hold a charge after the power is off. Wear gloves: broken glass collects in the sump where you cannot see it. Treat standing water as hot if the machine stopped during a hot cycle. Do not force the door on a machine that has stopped full, and never run a cycle to clear a blockage you have already proved.
When to call a technician
Call when the filter and sump are clear, the sink drains freely, the disposer is clear and any knockout plug has been dealt with, and the machine still holds water - especially if the pump hums rather than being silent. Mention that the machine is fully integrated, because drawing it out of a cabinetry run with a custom panel is part of the job.
Nearest pages of this class
What this page does not cover
This page covers the Cafe panel-ready integrated dishwashers, whose drain path runs hidden through cabinetry to a sink waste. The freestanding machines in the same range are easier to reach and are covered on the sibling page linked below. Deliberately absent: pump part identifiers, hose lengths, high-loop height requirements and flow figures.
Links: - [Cafe freestanding dishwasher not draining](/blog/cafe-dishwasher-drainage-failure-2)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
