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E4

Fagor E4 on a dishwasher: overflow or water leak in the base

Verified with sources1 sourceReviewed Oct 4, 2026
Technician coming? See the 2 steps they must show you
Open dishwasher showing its racks
Yelderberry (talk)CC BY-SA 4.0Image source

Risk level

Medium

Proceed carefully and stop if the check is unclear.

Urgency

High

Quick answer

On the Fagor 3LVF-623.1 dishwasher, E4 means overflow: some element of the dishwasher leaks and water is where it should not be. Turn off the main water valve, do not run it with water in the bottom tray and call the technical service.

Safety first

Stop and check this first

  • After an E4, do not start the dishwasher again with the valve open or with water in the bottom tray: Fagor asks you to turn off the main valve and empty that water first. Do not open the appliance: there is water close to mains voltage.

Safe checks you can perform

  • Turning off the main valve
  • Water in the bottom tray
  • Visible hose connections

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Finding the leak
  • Do not attempt this professional task: Leak test

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.

  1. Finding the leak

    What they doThe technician finds which element of the dishwasher leaks, empties the water from the bottom tray and repairs or replaces the leaking part.

    They must show youthe exact leak point and the affected part.

    In writingthe cause, the part replaced with its part number and the reason.

  2. Leak test

    What they doAfter the repair, the technician runs a full programme with the valve open and checks that no water appears in the base and E4 does not return.

    They must show youa full cycle without E4 and a dry base.

    In writingthe test carried out, 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.

  1. Turning off the main valve

    No special tools

    Who:
    you.
    How:
    as soon as you see E4, turn off the main water valve, which is what Fagor asks you to do before calling for service.
    Result that matters:
    no more water coming in while there is a leak.
    If water stops appearing:
    keep the valve closed until the repair visit.
    If water keeps coming out with the valve closed:
    unplug the appliance if the plug is dry and within reach, and contact the service as soon as possible.
    Evidence to keep:
    photo of the floor and the area around the dishwasher when E4 appeared.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

  2. Water in the bottom tray

    No special tools

    Who:
    you, without opening panels.
    How:
    Fagor says that if there is water in the bottom tray due to overflow or a small leak, it must be emptied before starting the dishwasher. Do not start it while water remains there.
    Result that matters:
    not using the appliance again with water collected in the base.
    If you cannot reach that water without taking anything apart:
    do not start it and let the technician empty it.
    If it is already empty and E4 returns when used:
    there is an active leak and the service must find it.
    Evidence to keep:
    note of when E4 appeared and at which stage of the programme.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

  3. Visible hose connections

    No special tools

    Who:
    you, looking from outside.
    How:
    without taking anything apart, look at where the supply hose joins the tap for any drips; the manual asks you to check for leaks after connecting it and opening the valve.
    Result that matters:
    ruling out an external leak that is easy to see.
    If you see drips at the connection:
    keep the valve closed and tell the technician.
    If you see no drips:
    the leak is internal and the technical service will find it.
    Evidence to keep:
    photo of the hose connection at the tap.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

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
Fagor
Product type
Dishwashers

Known code variants

  • Bosch E4
  • calentador Junkers E4
  • Daitsu E4
  • E04
  • E 4
  • E401
  • E402
  • E403
  • E421
  • E422
  • E423
  • E431
  • E432
  • E433
  • Electrolux cooker E4
  • Electrolux hob E4
  • Electrolux hob E401 overheating
  • Electrolux induction hob error E4
  • Electrolux placa E4
  • error E4 lavadora Haier
  • error E4 lavavajillas Fagor
  • error E4 placa inducción Electrolux
  • Fagor 3LVF-623.1 E4
  • Fagor dishwasher E4
  • Fagor dishwasher error E4
  • Fagor dishwasher overflow E4
  • Fagor lavavajillas E4
  • Haier E4 error washer
  • Haier E4 lavadora
  • Haier washer E4 not filling
  • Haier washing machine E4
  • Hydronext 5600S E4
  • Hydronext 5700S E4
  • Junkers E4
  • lavadora Haier E4 no coge agua
  • lavavajillas Fagor rebose E4
  • Mitsubishi E4
  • Mitsubishi Electric E4
  • Mr. Slim E4
  • PKA E4
  • placa Electrolux E401 sobrecalentamiento
  • vitro Electrolux E4

What it means

The Fagor 3LVF-623.1 manual (IO-DWS-1497) defines E4 as 'overflow' and explains it as some element of the dishwasher leaking. The manual's warning is to turn off the main water valve before calling for service and, if there is water in the bottom tray due to overflow or a small leak, to empty it before starting the dishwasher again. The Spanish section of the same manual uses the word 'relleno' for this code. This table is for that model. The code does not say which part leaks: the technician finds that.

Warnings and stop conditions

  • Higheditorial warning

    After an E4, do not start the dishwasher again with the valve open or with water in the bottom tray: Fagor asks you to turn off the main valve and empty that water first. Do not open the appliance: there is water close to mains voltage.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

Symptoms and causes

Probable causes · in order

  • Leak in a dishwasher elementCommon

    Fagor attributes it to some element of the dishwasher leaking; the water ends up in the bottom tray and triggers the warning.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

  • Small leak collected in the basePossible

    The manual covers water in the bottom tray from a small leak, which must be emptied before the dishwasher is used again.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

  • Dripping hose connectionPossible

    After connecting, Fagor asks you to open the valve and check for leaks; a dripping connection is ruled out by eye before blaming internal parts.

    Evidence: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)

Virtual technician

Does E4 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

Sources: Fagor 3LVF-623.1 lavavajillas manual de instrucciones IO-DWS-1497 (ES/PT/EN)reviewed 2026-10-04 · verified

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