The short answer
On a Danby dishwasher, a drainage failure most often comes back to filter and sump packed with debris. Danby is a Canadian maker that specialises in compact, portable and apartment-scale appliances, so its units end up in garages, basements, dorms, offices and second kitchens far more often than in a fitted main kitchen. The brand moves one thing in particular: drain hose kinked, blocked, or without a high loop ranks higher here than it otherwise would. The first two checks below are owner work and need no tools beyond what is already in the house.
What you observe
- Standing water in the bottom of the tub at the end of the cycle
- A cycle that runs much longer than usual and then stops with water in it
- Water backing up into the sink when the machine drains
- A humming from the pump with no water leaving
- Dirty water sitting over the filter
Ranked for a Danby dishwasher
- Filter and sump packed with debris — Why this rank: Everything the machine removes ends up here, and a packed filter chokes the drain path before it chokes anything else. It is the first thing to check on every drainage complaint. — Owner checkable: true
- Drain hose kinked, blocked, or without a high loop — Why this rank: The hose has to rise above the tub before it falls to the drain; without that loop, waste water siphons straight back in and the tub never empties. — Owner checkable: true
- Disposal knockout plug never removed, or the disposal full — Why this rank: On a new installation the plug in the disposal inlet is the classic cause of a machine that has never drained once — and on an old one, a full disposal blocks the same path. — Owner checkable: true
Check in this order
- Twist out the filter, lift it and look into the sump. — Because: It sits at rank 1 on this brand.
- Look behind the machine or under the sink and confirm the hose rises high before it drops. — Because: It sits at rank 2 on this brand.
- Run the disposal and note whether the machine has ever drained properly. — Because: It sits at rank 3 on this brand.
Steps a homeowner can safely take
- Bail the standing water out with a jug and a sponge so you can work and so a technician can see the tub. — Tools: jug, sponge, towels
About 20 min
- Remove and clean the filter assembly and check the sump beneath it for glass, labels and food debris. — Tools: warm soapy water, gloves
About 20 min
- Run the garbage disposal for thirty seconds, then try a drain-only or cancel cycle. — Tools: none
About 10 min
- On a recent installation, confirm the disposal knockout plug was removed — a machine that has never drained once usually stops here. — Tools: flashlight
About 15 min
- Check the drain hose for kinks and confirm it rises into a high loop before dropping to the drain. — Tools: flashlight
About 20 min
- Where an air gap is fitted on the counter, lift the cover and clear any debris inside it. — Tools: none
About 15 min
- Stop condition: Stop at the first step that would require a meter on live terminals.
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. Nothing on this page asks you to work at a live terminal, and none of it asks you to defeat a door interlock or a safety switch — those exist to stop the machine running in a state that can injure you, and a machine that will not run with its door open is working correctly. If a breaker trips twice on the same operation, leave it off: a repeat trip is a fault to be found, not a nuisance to be reset. Stop at the first step that would need a meter on live terminals. unplug-before-service branch-circuit-15-20a
Owner fix or service call
The pump hums at the drain step and no water moves The filter, hose loop, disposal and air gap are all confirmed clear The pump does not run at all when a drain is commanded Water backs up into the sink whenever the machine drains
Nearest pages of the same kind
Generalized information
This page is generalized across the Danby dishwasher range: no model-specific wiring diagrams, no part numbers, no service-manual procedure for any individual unit. Where your model differs, the model documentation wins. Line-specific pages sit below this one and go further for those units — Danby Designer Dishwasher: Will Not Drain. Read that page instead if your unit is one of them. model-specific wiring diagrams part numbers service-manual procedures
Links down: - [Danby Designer Dishwasher: Will Not Drain](/blog/danby-designer-dishwasher-drainage-failure)
Danby dishwasher
Other faults on this appliance
- Common Danby Dishwasher Problems
- Danby Dishwasher: Abnormal Noise or Vibration
- Danby Dishwasher: Does Not Clean or Dry
- Danby Dishwasher: Controls, Display or Error Code
- Danby Dishwasher: Cycle Will Not Run or Complete
- Danby Dishwasher: Door, Latch or Seal Fault
- Danby Dishwasher: Electrical, Fire or Gas Hazard
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
