The short answer
Water standing in the bottom of a DW machine is a blocked or badly routed drain far more often than a failed pump. On a built-in the drain route is hidden behind the cabinet, which is why an installation fault outranks a component fault. Work from the tub outwards and you will find it without tools in most cases. The 7 numbers in the table below share the construction this ranking is built on.
What you observe on these models
- Standing water over the filter at the end of every cycle — The classic built-in finding, and the filter is underneath it.
- Water appears only at the end of certain cycles — A cycle that was interrupted rather than a drain that failed.
- Dirty water rather than clean standing in the tub — It never drained at all, as opposed to refilling afterwards.
- A gurgle at the sink while the machine drains — Air-gap or high-loop trouble, which is an installation fault.
- NEAR MISS — the machine will not fill at all — That is a supply fault and belongs on the no-start page.
Causes, most likely first on the DW family
- The filter and the sump — First on this platform: water standing over a filter packed with debris is the classic finding on any built-in.
- The drain hose high loop, the air gap or a disposer knockout left in place — Second: a hose without a high loop siphons the sink back into the tub; a disposer fitted without its knockout removed blocks the drain completely from day one.
- The machine running a cycle it has not finished — Third: a paused or interrupted programme leaves water in the tub legitimately. Restarting and letting it complete is the first thing to try.
- The internal pump and its impeller — Fourth: hum with no flow, same as on any machine.
- Control or the water reservoir on models that carry one — Last: where a number fills from its own reservoir, an empty or unseated tank stops the cycle in a way that looks like a drain fault.
Check in this order, and why that order
- Scoop the standing water out and lift the filter — You cannot judge anything under water, and the filter is under it.
- Check for a high loop in the drain hose or an air gap at the sink — An installation without one siphons the sink back into the tub every time.
- Run the sink tap and watch whether it drains freely — A shared waste that is blocked explains both machines at once.
- Feel inside the sump with a cloth for a label or a seed — Flat debris blocks a pump without stopping it.
- If the machine drains into a disposer, confirm the knockout plug was removed — It is a one-time installation step and a machine that has never drained properly usually never had it done.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Isolating at the breaker is better than pulling the plug where the socket is behind the appliance, because it removes the temptation to work one-handed.
Models in the DW family — The numbers this page covers.
Reference| Model number | Family key |
|---|---|
| DW1831D0WE | avanti:dishwasher:dw |
| DW1832D1BE | avanti:dishwasher:dw |
| DW1833D3SE | avanti:dishwasher:dw |
| DW18D0WE | avanti:dishwasher:dw |
| DW18D1BE | avanti:dishwasher:dw |
| DW18D3SE | avanti:dishwasher:dw |
| DW21UT22N224 | avanti:dishwasher:dw |
When to call a technician
Clearing a filter, re-routing a hose and straightening a kink are yours. On these models the line falls at the pump and the electrical components below the tub. Call without working through anything at all for a burning smell, a tripped breaker, or water reaching a socket.
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.
