What you are actually seeing
- Black or grey slime in the door gasket folds
- A drain or sewage smell rather than a food one
- A smell that is worse after the machine has stood unused
- Not this fault: A smell with standing water in the tub
Ranked causes on a Conservator dishwasher
- Drain hose or air gap holding residue — Ranked here because: these machines are commonly installed by the owner or the delivering dealer, and levelling and venting errors are the most frequent finding
- Kitchen drain or disposer as the source — Ranked here because: a hose is a flexible part on a pressurised or draining circuit and it fails at its clamps and bends
- Standing water in the sump — Ranked here because: the pump is the only powered part in the drain path and it takes everything the machine washes off
- Biofilm in the door gasket and the door edge — Ranked here because: the gasket is the cheapest thing on the machine to get wrong and the easiest to confirm
- Filter and sump holding food residue — Ranked here because: a simple machine gives the owner more ways to load and dose it wrong, and those show up as faults
- Long gaps between cycles or rinse-only use — Ranked here because: dosing and product choice change the result more than any component on the machine
What to check, and in what order
- Pull back the door gasket folds and clean them and the door lip with hot water and a cloth
- Run the hottest programme on an empty machine with a dishwasher cleaner
- Take off both spray arms and flush them through
- Check the drain hose has a high loop and is not holding standing water
Steps you can safely do yourself
- Take off both spray arms and flush them through — Tools: warm water — Estimated time: about a quarter of an hour
- Check the drain hose has a high loop and is not holding standing water — Tools: flashlight — Estimated time: about a quarter of an hour
- Smell the sink drain and run the disposer with cold water — Tools: none — Estimated time: a few minutes
- Remove the filter assembly, wash it in hot soapy water with a brush and clear the sump by hand — Tools: gloves, brush, hot water — Estimated time: about twenty minutes
Safety
Safety
unplug-before-service
When to call a technician
the smell persists after the filter, the gasket and a hot cleaning cycle the machine is not draining fully, since stale standing water will always come back the smell is burning or electrical rather than organic
Nearest pages
What this page does not cover
Not this fault: the family pages for the laundry, refrigeration and cooking lines Not this fault: model-specific pages once the model and serial plate is read
Links: - [Common Conservator Dishwasher Problems](/blog/conservator-dishwasher-problems) - [Common Conservator Dryer Problems](/blog/conservator-dryer-problems) - [Common Conservator Freezer Problems](/blog/conservator-freezer-problems) - [Conservator Dishwasher: Abnormal Noise or Vibration](/blog/conservator-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.
