- Appliances
- Dishwashers
I40
Zanussi i40 on a dishwasher: water level control fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On a Zanussi dishwasher, i40 (also i41, i43, i44 or four beeps) points to a possible pressure sensor and water level control fault. Unplug it for about 5 minutes, clean the filters and clear foam from the sump before trying again.
Safety first
Stop and check this first
- Water and electricity: unplug before clearing foam or water from the sump and plug back in with dry hands.
Safe checks you can perform
- Reset
- Filters and foam in the sump
- Detergent used
Leave these tasks to a qualified professional
- Do not attempt this professional task: Pressure sensor test
- Do not attempt this professional task: Test programme
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Pressure sensor test
What they doWith the appliance disconnected from the mains, the engineer checks the pressure sensor, its tube and connector, and checks the level reading during a fill.
They must show youthe sensor reading or the defect found in tube or connector against the manufacturer's specification.
In writingwhat was tested, the result and, if the sensor is replaced, its part number and why.
Test programme
What they doAfter the repair, the engineer runs a full programme and checks it fills to the correct level and i40 does not appear.
They must show youthe programme finished with no code.
In writingthe programme tested, the result and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Reset
- Who:
- you, no tools.
- How:
- unplug the dishwasher and plug it back in after about 5 minutes. You can also switch off its circuit at the consumer unit.
- Result that matters:
- whether the alert clears when power returns.
- If it clears:
- run a programme to see if it stays clear.
- If it stays:
- move on to cleaning filters and sump.
- Evidence to keep:
- a photo of the code before the reset and the time.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
Filters and foam in the sump
- Who:
- you, with the appliance unplugged.
- How:
- take out and clean all the filters and clear foam and debris from the sump. Plug back in and run a suitable programme.
- Result that matters:
- whether there was foam or debris and whether the programme starts and runs normally.
- If the programme runs normally:
- Zanussi says the problem is solved.
- If i40 returns with everything clean:
- an engineer needs to check the pressure sensor.
- Evidence to keep:
- a photo of the sump before cleaning.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
Detergent used
- Who:
- you.
- How:
- check which detergent you used in the last programme and whether it was made for dishwashers.
- Result that matters:
- whether there could have been excess foam.
- If you used an unsuitable product or too much:
- tell the engineer if the alert repeats; it explains the foam.
- If the detergent was correct:
- foam does not explain the alert; it strengthens the case for a sensor check.
- Evidence to keep:
- the detergent name and amount used.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Zanussi
- Product type
- Dishwashers
Known code variants
- AEG dishwasher i40
- AEG dishwasher i43
- AEG dishwasher i44
- AEG Fehler i40
- AEG Geschirrspüler i40
- AEG Geschirrspüler i43
- AEG Geschirrspüler i44
- AEG i40 error
- AEG lavastoviglie i40
- AEG lavastoviglie i43
- AEG lavastoviglie i44
- AEG lavavajillas i40
- AEG lavavajillas i43
- AEG lavavajillas i44
- AEG lave-vaisselle i40
- AEG lave-vaisselle i43
- AEG lave-vaisselle i44
- code erreur AEG i40
- Electrolux dishwasher i40
- Electrolux i40
- error AEG i40
- error i40 lavavajillas Electrolux
- error i40 lavavajillas Zanussi
- errore AEG i40
- I40
- i40 AEG dishwasher
- i40 AEG Geschirrspüler
- i40 AEG lavastoviglie
- i40 AEG lavavajillas
- i40 AEG lave-vaisselle
- i41
- i43
- i44
- Zanussi dishwasher four beeps
- Zanussi dishwasher i40
- Zanussi dishwasher i41
- Zanussi dishwasher i43
- Zanussi dishwasher i44
- Zanussi i40 error
- Zanussi i40 lavavajillas
- Zanussi i41 lavavajillas
- Zanussi i43 lavavajillas
- Zanussi i44 lavavajillas
- Zanussi lavavajillas cuatro pitidos
What it means
Zanussi puts i40 down to a possible fault in the pressure sensor and water level control. That sensor measures how much water is in the tub so the control knows when to stop filling and when to heat or wash. Foam or debris in the sump can upset the reading, which is why Zanussi asks you to reset and clean the filters and sump first. The code says the level reading does not add up, not that the sensor has failed.
Warnings and stop conditions
- Mediumeditorial warning
Water and electricity: unplug before clearing foam or water from the sump and plug back in with dry hands.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
Symptoms and causes
Probable causes · in order
- Foam or debris in the sumpCommon
Fits if you see foam or dirt at the bottom of the tub when you open it. You fix it by cleaning filters and sump.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
- One-off control glitchPossible
Fits if the alert clears after unplugging for about 5 minutes and does not return over several washes.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
- Pressure sensor or its connectionPossible
If i40 returns with everything clean and after a reset, the engineer has to check the sensor, its tube and its connector.
Evidence: Dishwasher displays error code i40, i43 or i44 | Zanussi
Virtual technician
Does I40 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Dishwasher displays error code i40, i43 or i44 | Zanussi
Zanussi (Electrolux Group) · official_doc
Was this entry useful?