Aeg Dishwasher Not Heating: Check the Programme, Filters, and Foam First

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Let the cycle finish and note the selected Aeg programme, whether the load is unusually dirty, whether the dishes are cold, and whether there is steam when the door opens. Compare the programme with the exact user manual rather than judging heat from a quick programme alone.

   Expected result: A quick or otherwise lower-intensity programme was selected, the cycle was interrupted, or a suitable programme completed with cold dishes and no steam.

   Next step: If the programme was unsuitable or interrupted, use the manual to choose an appropriate programme and observe one complete cycle. If a suitable complete cycle remains cold, continue with the filter and sump check.

   Stop if: Do not touch standing hot water or dismantle the dishwasher to measure temperature or inspect the heater.

   Why this matters

   Why: Programme selection or an incomplete cycle can explain poor washing or drying results without proving a heating-system failure. A suitable completed programme with both cold dishes and no steam makes a persistent heating problem more plausible, but it is still not a component diagnosis.

2. Check 2

   Switch the dishwasher off, wait for the interior to be safe to reach, and clean only the removable filters and user-accessible sump area as shown in the Aeg user manual. Remove visible food particles without taking off covers or reaching into the cabinet.

   Expected result: Food particles or residue are blocking the filters or sump, or the filters and sump are visibly clear.

   Next step: If residue was present, refit the filters correctly according to the manual and run an appropriate complete programme. If the filters and sump were already clear, continue to the foam and reset checks.

   Stop if: Do not force a filter, remove the pump or heater cover, use tools inside the sump, or work on the appliance while it is energized.

   Why this matters

   Why: Aeg lists blocked filters and sump as a possible contributor to poor results. Clearing visible residue can remove a circulation restriction, but clear filters do not prove that the heating system is healthy or faulty.

3. Check 3

   Look at the tub after the programme for water and foam, and review whether washing-up liquid was used on the crockery or spilled into the rinse-aid chamber. From a safe position, remove accessible foam with a sponge or towels; do not start normal washing while the tub is still foaming.

   Expected result: There is water and foam at the bottom, there is evidence of hand-washing liquid or rinse-aid spillage, or there is no visible foam.

   Next step: If foam is present, remove what is safely accessible and follow the model manual or Aeg support guidance until the foam is gone. If washing-up liquid entered the rinse-aid chamber, stop and arrange service. If there is no foam, continue with the reset check.

   Stop if: Do not add unapproved chemicals, run repeated cycles to chase foam, or continue using the dishwasher when washing-up liquid is in the rinse-aid chamber.

   Why this matters

   Why: Aeg treats over-foaming as a separate cause of poor results. Foam can interfere with the cycle, so its presence weakens the conclusion that the heater itself is the first cause. Washing-up liquid in the rinse-aid chamber requires a technician visit according to Aeg.

4. Check 4

   After the interior is safe and any foam issue is addressed, switch the dishwasher off at the mains supply, wait five minutes, switch it back on, and restart an appropriate programme as Aeg describes. Do not repeat the reset if there is damage, smoke, a burning smell, water near electrical parts, or a breaker problem.

   Expected result: The next complete appropriate programme heats normally, or the dishes remain cold and there is still no steam.

   Next step: If heat returns, monitor the next normal load and keep the programme and filter condition noted. If the result is still cold, stop using the dishwasher, unplug it, and arrange qualified Aeg or appliance service.

   Stop if: Do not open the cabinet, bypass a safety device, or test live voltage or internal wiring.

   Why this matters

   Why: Recovery after the reset makes a temporary control or interrupted-cycle condition more plausible. Persistent cold results after the programme, filter, foam, and reset checks make an internal heating fault more plausible, but they do not identify the failed component.

5. Check 5

   Record the exact Aeg model and product number, the programme used, whether the dishes were cold and steam was absent, the filter and sump condition, any foam or detergent mistake, and the result of the five-minute reset.

   Expected result: The dishwasher remains cold after the user-accessible checks, or the problem includes foam in the rinse-aid chamber, repeated electrical symptoms, damage, or an unsafe interior.

   Next step: Leave the dishwasher unplugged and arrange qualified appliance service with the recorded information. Use the exact model manual and support route for any further model-specific instruction.

   Stop if: Do not order or replace a heater, pump, control board, or other internal part based only on the cold-dish symptom.

   Why this matters

   Why: Aeg identifies a possibly faulty heating element when no heat remains and recommends a service engineer. The recorded pattern helps service distinguish a programme or foaming condition from a persistent internal fault without requiring the owner to name a part.