The short answer
On these models the drain path runs from the sump, through a pump, up a hose to a high loop and into the waste, and every one of those four stages fails in a characteristic way. A pump that hums without moving water has something wrapped round its impeller, which is a different fault from one that is silent. Only a pump replacement takes this off the owner list on this platform. Checking your listing against the table takes a moment and saves ordering against the wrong catalogue.
How it presents
- Water drains away very slowly over hours — A partial restriction rather than a blockage, typically in the hose or at the waste connection.
- A smell that gets worse between uses — Standing water in the sump with food in it. The smell is a symptom of the drainage fault, not a separate problem.
- The machine drains fully on some cycles and not others — A partial restriction that longer, hotter programmes can clear and short ones cannot.
- Water reappears in the tub hours after a cycle ends — Backflow from the waste, which means the high loop or the check valve rather than the pump.
- Standing water covering the bottom of the tub — More than the film that always remains in the sump. Enough to see and enough to smell after a day.
- NEAR MISS — the machine never filled in the first place — An empty tub with a stopped cycle is a fill fault, not a drain fault, and it belongs on a different page.
Causes, most likely first on this roster
- Filter and sump packed with debris — Top of the list. This is the last thing between the tub and the pump and it catches everything, so when it fills the water stops before the pump is ever involved.
- Waste connection blocked, or the disposer plug never removed — Second, and it accounts for almost every machine that has never drained properly since the day it was installed. A new disposer ships with a sealed spigot, and a machine connected to it drains into a closed pipe.
- Drain hose kinked or without a high loop — A hose crushed behind the machine restricts; a hose without a rise in it lets the sink drain back into the tub. Both are installation faults rather than failures, and both are common.
- Foreign object round the pump impeller — Glass, a fruit sticker or a piece of wire stops the impeller dead. The hum with no flow is what separates this from an electrical failure.
- Drain pump failed — Bottom of the list. Silence at the drain stage means dead or not being told to run, and separating those needs a meter rather than a torch.
Follow the water out, in this order
- Bail out the standing water and remove the filter — It gives you access to everything else and the filter itself is the commonest answer on the page.
- Start a drain cycle and listen — A hum with no flow is a blocked impeller. Silence is electrical. That distinction decides everything that follows.
- Check whether water returns to the tub while the machine sits idle — Backflow means the high loop or the check valve, and it is proved by leaving the machine empty overnight.
What to do before the panel comes off
Safety
Nothing below happens with the machine live. Unplug it or switch off its breaker, and treat any capacitor as charged until it has been discharged properly.
Models in the D family — This profile generalizes over every listing in the roster below, and stops where the roster stops.
Reference| Model number | Family key |
|---|---|
| D5424* | asko:dishwasher:d |
| D5426* | asko:dishwasher:d |
| D5434* | asko:dishwasher:d |
| D5436* | asko:dishwasher:d |
| D5524* | asko:dishwasher:d |
| D5526* | asko:dishwasher:d |
| D5534* | asko:dishwasher:d |
| D5536* | asko:dishwasher:d |
| D5554* | asko:dishwasher:d |
| D5556* | asko:dishwasher:d |
| D5624* | asko:dishwasher:d |
| D5626* | asko:dishwasher:d |
| D5628* | asko:dishwasher:d |
| D5634* | asko:dishwasher:d |
| D5636* | asko:dishwasher:d |
| D5654* | asko:dishwasher:d |
| D5656* | asko:dishwasher:d |
| D5894* | asko:dishwasher:d |
| D5954* | asko:dishwasher:d |
| D5956* | asko:dishwasher:d |
The line between a fix and a call
Clear what you can see and reach. Call when the machine hums and will not move water after the sump has been cleared, because that means the obstruction is inside the pump housing, which does not open from the tub side on this platform.
Nearest pages of this class
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
