The short answer
A Kenmore dishwasher that will not drain is very often defeated by something outside the machine: a new waste disposer whose knockout plug was never removed, or a drain hose that has lost its high loop. Check those before you open anything, because they are free to check and they are common. Before any part is ordered, read the rating plate: the badge on the door does not identify the platform behind it.
What you observe
- Water standing in the bottom at the end of a cycle — The pump either could not run or could not move anything.
- A hum from the pump with nothing happening — The motor is trying against a blockage rather than idle.
- NEAR MISS — water on the floor rather than in the tub — That is a leak and belongs on the leak page.
Causes, most likely first on a Kenmore dishwasher
- Waste disposer knockout plug or a blocked disposer — Id: disposer — When a dishwasher drains into a new disposer, the knockout plug inside the inlet must be removed. Left in, the machine can never drain, from the first day. First here because it is free to check and it is the classic finding after any kitchen work.
- Filter and sump blocked — Id: filter — Second: the filter catches debris before the pump. Packed, it stops the water leaving no matter how well the pump works.
- Drain hose kinked, or its high loop lost — Id: drainhose — Third: the hose must rise before it falls, or the machine cannot break the siphon. Pushed back against a wall, it kinks, and the water has nowhere to go.
- The household drain itself is blocked — Id: sinkdrain — Last, and the reason the order matters: if the sink drains slowly too, the machine is not the problem — it is simply connected to a waste that cannot take its water.
Check in this order, and why
- Check whether a disposer was fitted recently — If so, the knockout plug is the first suspect. First because it is the top-ranked cause above and costs nothing.
- Bail out the water and pull the filter — You cannot judge anything downstream until the filter is clear. Second because its cause ranks second above.
- Follow the hose and look for a kink and a high loop — It must rise above the tub before falling to the waste. Third because its cause ranks third above.
What an owner can safely check
- Bail out the standing water and lift out the filter — A jug and a sponge; check the sump for glass before reaching in.
Tools: jug, spongeAbout 20 min
- Photograph the rating plate before calling anyone — The full model number decides which parts fit; the badge on the door does not.
About 5 min
- Check the drain hose for a kink and confirm its high loop — Pull the machine forward gently if the hose disappears behind it.
Tools: flashlightAbout 20 min
- Check the waste disposer inlet and run the sink — A blocked or newly fitted disposer explains a machine that never drained properly.
About 15 min
- STOP HERE if the next step is opening the pump housing — That means power off, panels off and standing water — a service call for most owners.
Before you open anything
Safety
Switch the machine off at its breaker before reaching into the sump or behind the kickplate, and remember that water and a live circuit share that space. Broken glass in the sump is the commonest injury in this job, so look before you feel. Never run the machine with the door interlock defeated to watch the pump work.
When to call a technician
Call when the filter is clear, the hose is routed correctly, the disposer is proven and the water still stands — at that point the pump or its control is the answer, and both sit behind panels with water present. Call sooner if the machine trips its breaker when it tries to drain, because that is an electrical fault rather than a blockage. Parts are ordered against the full model number including its prefix, because the same badge covers more than one platform and the platforms do not share components.
Nearest pages of this class
What this page does not cover
This page covers Kenmore dishwashers as a class, not one family or model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer. Not here: pump part numbers, hose lengths and connector sizes. It is a retail house brand: the machine in front of you was built by one of several manufacturers, and which one it was is decided by the prefix of the model number on the rating plate.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
