The short answer
When a Danby Designer dishwasher presents with an odour or mould problem, the first place to look is food debris trapped in the filter and sump. Danby Designer is Danby’s mainstream retail line — the same compact and apartment-scale platform in more finishes, with a little more electronic control content than the value lines. The brand moves one thing in particular: door kept closed on a damp tub between cycles 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
- A stale or sour smell when the door is opened
- A musty smell that returns within a day of cleaning
- Black or pink film in the door seal channel or around the filter
- A smell that is worst after the machine has stood unused
- Dishes that come out clean but smelling of the machine
Ranked for a Danby Designer dishwasher
- Food debris trapped in the filter and sump — Why this rank: This is where organic matter collects and where a smell nearly always begins; a filter that has never been cleaned is the answer far more often than anything mechanical. — Owner checkable: true
- Biofilm in the door seal channel and around the tub lip — Why this rank: The channel behind the seal never gets sprayed and stays damp, so it grows a film that no cycle can reach — you have to wipe it by hand. — Owner checkable: true
- Water standing in the drain hose or a missing high loop — Why this rank: Without a high loop the hose holds stale water permanently, and every cycle draws that smell back into the tub. — Owner checkable: true
Check in this order
- Twist out the filter and smell it. — Because: It sits at rank 1 on this brand.
- Run a paper towel round the inside of the seal channel and look at it. — Because: It sits at rank 2 on this brand.
- Confirm the hose rises above the tub before falling to the drain. — Because: It sits at rank 3 on this brand.
Steps a homeowner can safely take
- Remove and wash the filter assembly thoroughly in warm soapy water and scrub it with an old toothbrush. — Tools: warm soapy water, old toothbrush
About 20 min
- Wipe inside the door seal channel and around the tub lip with a cloth and a mild detergent — this is the area no cycle ever reaches. — Tools: cloth, mild detergent
About 20 min
- Remove both spray arms, rinse them through under a tap and clear every hole. — Tools: straight pin, running water
About 20 min
- Run an empty cycle at the hottest setting with a dishwasher cleaner, or white vinegar in a bowl on the top rack. — Tools: dishwasher cleaner or white vinegar — Time: 1 cycle
- Confirm the drain hose rises into a high loop so it does not hold stale water between cycles. — Tools: flashlight
About 20 min
- Leave the door ajar between cycles for a week and see whether the smell returns — this alone settles many of these calls. — Tools: none — Time: 1 week
- 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 smell returns within days of a full clean and a hot cycle There is a sewage smell that is also present at the sink with the dishwasher idle Water is standing in the tub between cycles There is any burning or hot-plastic smell — that is an electrical matter, not a hygiene one
Nearest pages of the same kind
Generalized information
This page is generalized across the Danby Designer 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. For the whole Danby range rather than this line, see Danby Dishwasher: Odor or Mold. model-specific wiring diagrams part numbers service-manual procedures
Links up: - [Danby Dishwasher: Odor or Mold](/blog/danby-dishwasher-smell-mold)
Danby Designer dishwasher
Other faults on this appliance
- Common Danby Designer Dishwasher Problems
- Danby Designer Dishwasher: Abnormal Noise or Vibration
- Danby Designer Dishwasher: Does Not Clean or Dry
- Danby Designer Dishwasher: Controls, Display or Error Code
- Danby Designer Dishwasher: Cycle Will Not Run or Complete
- Danby Designer Dishwasher: Door, Latch or Seal Fault
- Danby Designer Dishwasher: Will Not Drain
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
