What you are most likely looking at
Odour is a maintenance problem in almost every case, and the three places to look are the same on every machine. That puts biofilm on the door gasket and door edge at the top of the list here and grease in the spray arms and tub at the bottom.
What owners actually report
- A stale or sour smell when the door is opened — Soil in the filter or the sump, warmed by the last cycle.
- Black or pink film round the door gasket — Biofilm in the place the machine never washes.
- A smell that worsens if the machine is unused for days — Standing water in the sump going stale.
- NEAR MISS — a burnt or hot-plastic smell — That is electrical or an item on the element, and it is urgent rather than cosmetic.
Causes, most likely first on this unit
- Biofilm on the door gasket and door edge — The spray never reaches the gasket channel or the lower door edge, so soil builds exactly where the smell escapes. Built-in doors are heavy and are hung on adjustable hinges, so a door that has dropped is a real cause on this line and not a throwaway check.
- A loaded filter and sump — Food trapped in the filter sits warm and damp between cycles. It is the source in most machines and it is cleaned by hand. Drainage is where water that the machine made on purpose goes wrong, so it leads whenever water is the complaint.
- A drain hose with no high loop — Without the loop, sink water and its smell sit in the hose against the machine. It sits here because a blocked drain accounts for more water on a floor than every plumbing connection combined.
- Grease in the spray arms and tub — Cool eco cycles leave a grease film that holds odour.
The diagnostic order
- Pull the filter and smell it — It answers the question immediately in most machines.
- Wipe under the door gasket with a white cloth — Black or pink marking on the cloth is biofilm.
- Run the sink and smell the drain with the dishwasher off — It separates a plumbing smell from an appliance one.
- Check the drain hose rises before it falls — A missing high loop keeps the hose wet with sink water.
Step by step, as far as it is safe to go
- Remove and wash the filter and clear the sump — Hot soapy water and a brush; make sure the sump underneath is clear too.
Tools: soft brush
- Clean the gasket, the door edge and the cutlery basket — These are the three places the spray never reaches.
Tools: cloth
- Run a hot empty cycle with a dishwasher cleaner — It strips the grease film that holds odour in the tub and the arms.
- STOP before dismantling the sump or the drain pump — That is mains wiring and usually broken glass.
Safety
Safety
Never mix a dishwasher cleaner with bleach, and run cleaners on an empty machine with good ventilation. Cut the power at the breaker before anything below the filter comes out; a capacitor can hold a charge after the power is off.
The line between a fix and a service call
Cleaning the filter, the gasket and the tub is owner work and it solves most odour complaints. A sump strip, a pump or a shared-drain problem is a service call.
Nearest pages of this class
Generalized information — and what is missing from it
What this page does not cover: model-specific figures, part numbers and service sequences for any single Café family — it describes how a built-in dishwasher behaves as a class. Where a more specific page exists for your unit it is linked below and should be read first.
Links: - [Common Café Dishwasher Problems](/blog/caf-dishwasher-problems) - [Café Dishwasher: Abnormal Noise or Vibration](/blog/caf-dishwasher-abnormal-noise)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
