Bertazzoni Dishwasher: Odor or Mold
This page is written for the second occurrence: the fault was fixed and it has come back. A repeat is not the same diagnosis as a first failure — the part that was just replaced is the least likely suspect, and whatever caused it to fail is the most likely one. What changes the order on Bertazzoni is that the installation and the dealer service channel shape the answer as much as the component does.
What you are actually seeing
- A stale or sour smell when the door is opened
- A drain smell rather than a food smell
- Clean dishes that smell
- A slimy feel on the filter or in the sump
- A smell that is worse after the machine has stood unused
- A new-machine plastic smell — Means: It fades over the first cycles.
- A burning smell — Means: Stop using the machine; that is not biofilm.
- Heading secondary: Symptoms that mean a different fault
Most likely causes on a Bertazzoni Dishwasher, in order
- Drain hose without a high loop, or a stale hose — Id: drain-hose — Why: Waste water sits in the hose or siphons back, and the smell comes with it.
- House drain or disposal — Id: house-drain — Why: The smell arrives through the shared drain path.
- Long periods unused — Id: unused — Why: The trap dries and the sump goes stale.
- Food debris in the filter and the sump — Id: filter — Why: This is where the smell almost always is, and the filter is the part designed to be removed and washed.
- Only ever running short or rinse cycles — Id: rinse-only — Why: Nothing ever reaches a temperature that clears grease.
- Note: Bertazzoni is an Italian cooking-appliance house whose kitchens are specified as a suite and installed flush into millwork, sold and serviced through appliance dealers rather than big-box channels. This ranking is written for a repeat, not a first failure: whatever was replaced last time is the least likely suspect and whatever made it fail is the most likely one. On top of that, a flush-installed suite is leveled to the millwork and not to the floor, so alignment, clearance and installation faults outrank component wear on a machine this age.
What to check, and in what order
- Pull the filter and smell it — Why here: If the smell is there, it is the answer, and the filter is designed to come out.
- Run a finger round the door gasket channel — Why here: Biofilm there transfers to the dishes and is the reason clean dishes smell.
- Check the drain hose has a high loop under the counter — Why here: Without it, drain water sits in the hose or returns to the tub.
- Check whether water stands in the sump between cycles — Why here: Standing dirty water becomes a smell in a couple of days.
Checks you can safely do yourself
- Remove the filter assembly, wash it in hot soapy water with a brush, and refit it locked home. — Tools: brush, hot soapy water
About 25 min
- Clean the door gasket and its channel, and the tub lip below it, with hot soapy water. — Tools: cloth, brush
About 25 min
- Remove each spray arm, rinse it through until it runs clear, and refit. — Tools: hot water
About 20 min
- Run the hottest normal cycle with the machine empty and a dishwasher cleaner or a measured detergent dose. — Tools: dishwasher cleaner — Time: 1 cycle
- Check under the sink that the drain hose rises high before falling to the drain, and secure it there. — Tools: cable tie
About 20 min
Before you open anything
Safety
Never defeat a door interlock or a safety switch to keep an appliance running, and stop at the first step that would put a meter on live terminals. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off.
Where the owner fix ends
Call a technician when the smell persists after the filter, gasket, arms and a hot clean-out cycle, or when water stands in the sump between cycles. Standing water is a drainage fault and it will keep the smell coming back.
Cleaning, seating, levelling and filter work are owner jobs. Anything requiring a board, an ignition module or the removal of a flush-fitted unit from millwork belongs with the dealer service network.
The same problem on other brands
What this page does not cover
This page is generalized across every Bertazzoni dishwasher family and model, and carries no model-specific error codes, variant matrix or service-part numbers. Cooking products are the core line; refrigeration, dishwashing and laundry are built on European platforms and carry those platforms’ service parts. A family- or model-specific page beneath this one takes precedence over anything written here. Common BERTAZZONI Dishwasher Problems — Slug: bertazzoni-dishwasher-problems — Relation: parent BERTAZZONI Dishwasher: Odor or Mold — Slug: bertazzoni-dishwasher-smell-mold — Relation: variant
Other Bertazzoni dishwasher problems
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
