The short answer
On a Big Chill dishwasher, smell or mould most often comes down to food trapped in the filter and sump. The filter leads on any dishwasher, and grease ranks high on a machine used mainly on shorter programmes, which is how most retro-kitchen machines are actually run. Most of what follows is an owner check; it becomes a service call when the smell returns within days of a full clean.
What you are actually seeing
- The entries at the end belong to a different fault and send you elsewhere.
- A stale or eggy smell when the door is opened.
- A dark film in the gasket folds or under the door lip.
- A smell that is worst after the machine has stood unused for days.
- If instead you see this: A burning or hot-plastic smell — that is electrical or a melted item on the heater, and it is not this page.
Ranked causes on a Big Chill dishwasher
- The filter leads on any dishwasher, and grease ranks high on a machine used mainly on shorter programmes, which is how most retro-kitchen machines are actually run. Settle one observable question before you use this ranking — retro-trimmed front versus a custom or panel-ready front: one finished front with the brand hardware fitted to it is a factory retro door, while fasteners along the inner edge of the door mean a separate panel has been added. Look at the door face and its edges. A factory retro front is one finished piece with the brand hardware fitted to it; a panel-ready door carries a separate panel fastened through the door skin, and you can usually see the fasteners along the inner edge of the door. On factory retro front units, the door mass is what the springs were set for at the factory; on panel-ready front with an added panel units, the added panel changes the door mass, and the door spring or cable tension has to match it or the door drops, slams and eventually stops sealing.
- Food trapped in the filter and sump — Why: This is where nearly every dishwasher smell starts.
- Biofilm in the gasket folds and under the door lip — Why: The gasket channel and the lower door lip stay wet and never see the wash spray, so they build a black film that no cycle reaches.
- Scale and grease in the spray arms — Why: Greasy residue inside the arms and on the tub roof holds odour and is not reached by a normal wash.
- The drain hose, air gap or sink line — Why: A smell that comes and goes with sink use is coming from the shared drain, not from the machine.
What to check, and why in this order
- Free checks first, then the ones that need the machine opened.
- Clear and wash the filter and the sump first, because that is where the smell almost always begins.
- Then clean the gasket folds and the door lip by hand, since the wash spray never reaches them.
- Then check for standing water, which is a drainage fault wearing a smell as a symptom.
Checks you can safely do yourself
- Stop at the first step that would need a meter on live terminals.
- Remove the filter assembly, wash it in hot soapy water with a brush, and clean the sump beneath it by hand. — Number: 1 — Tools: washing-up brush, gloves, hot soapy water — Time: under half an hour
- Wipe out the gasket folds and the lip under the door with a cloth and a soft brush. — Number: 2 — Tools: cloth, old toothbrush — Time: under half an hour
- Bail out any standing water and note whether it returns, because a machine that will not drain cannot be made to stop smelling. — Number: 3 — Tools: cup, sponge — Time: under ten minutes
Before you start
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 below asks you to put a meter on live terminals, and nothing below asks you to defeat a door switch or an interlock — those exist to cut power to something that would otherwise hurt you. If the plug, the cord or the outlet is warm, discoloured or smells hot, stop there and have the circuit looked at before you use the dishwasher again.
When to stop and call a technician
The line is whether the next step needs live testing, sealed-system access or a part you cannot verify. Call for anything under the trim that needs the door skin separated, and anything involving the sealed motor, or when:
the smell returns within days of a full clean the tub holds standing water that will not clear the smell tracks the sink rather than the machine, which is plumbing rather than appliance work
What this page does not cover
Common BIG CHILL Dishwasher Problems (big-chill-dishwasher-problems) Big Chill Dishwasher: Odor or Mold (big-chill-dishwasher-smell-mold-2)
This page is generalized across the Big Chill dishwasher range: it is written for the brand and the fault, not for one family or one model number. It carries no model-specific code table, wiring detail or part number, and no measured failure rate, because no measured snapshot was available here. Where a family- or model-specific page exists beneath this one, the links below go down to it. A companion page covers the same fault from a different starting point: Big Chill Dishwasher: Odor or Mold (big-chill-dishwasher-smell-mold-2).
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
