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PARPADEO-ALTERNO-CAFE-LECHE

Nespresso Lattissima PARPADEO-ALTERNO-CAFE-LECHE: overheat

Verified with sources2 sourcesReviewed Oct 18, 2026
Technician coming? See the 2 steps they must show you
Black De'Longhi Magnifica bean-to-cup coffee machine with cups on top
FeťourPublic domainImage source

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Medium

Quick answer

On Nespresso Lattissima One coffee machines, PARPADEO-ALTERNO-CAFE-LECHE (all coffee buttons and all milk recipe buttons flashing alternatively) indicates machine overheating or the 10-minute lockout after emptying the system. Wait at least 10 minutes for the appliance to cool down.

Safety first

Stop and check this first

  • Do not touch surfaces that become hot during and after operation or descaling (such as the descaling pipe and milk spout), and never open the appliance housing.
  • If coffee volumes higher than 150 ml are programmed, always let the machine cool down for 5 minutes before making the next coffee to prevent overheating.

Safe checks you can perform

  • Wait at least 10 minutes without pressing buttons so the machine can cool down
  • Refill the water tank with fresh cold potable water and allow 5-minute pauses for large cups
  • Restore beverage quantities to factory settings if an oversized volume was programmed
  • Check if the orange descaling alert is lit and run the 20-minute descaling cycle

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Contact the Nespresso Club if the alternating button flash persists after cooling
  • Do not attempt this professional task: Send the machine to an authorised Nespresso / De'Longhi service centre for thermal inspection

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. Contact the Nespresso Club if the alternating button flash persists after cooling

    What they doIf all coffee and milk recipe buttons continue flashing alternatively after a full cooldown, call the Nespresso Club.

    They must show youverification of the 25-second heat-up sequence from cold and the button indicator state.

    In writingthe Nespresso Club case reference number along with your Lattissima One model (EN 500) and serial number.

  2. Send the machine to an authorised Nespresso / De'Longhi service centre for thermal inspection

    What they doIf the heating block or thermal control requires repair, send the appliance to an authorised service representative as instructed by Nespresso.

    They must show youthe thermal sensor and hydraulic flow test results confirming the machine no longer overheats during normal extraction.

    In writinga written repair summary listing any replaced or repaired parts and a prior cost estimate if the fault is outside warranty coverage.

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. Wait at least 10 minutes without pressing buttons so the machine can cool down

    No special tools

    Who:
    you.
    How:
    leave the machine idle for at least 10 minutes (or switch it off by pressing the Espresso and Lungo buttons simultaneously for 2 seconds) until the heating block cools down and any post-emptying 10-minute lockout expires.
    Result that matters:
    the buttons blinking for about 25 seconds while heating up and then turning steady in ready mode when switched back on.
    If all three beverage buttons turn steady:
    the overheat cooldown or 10-minute post-emptying block has cleared.
    If all buttons blink simultaneously for 10 seconds and the machine switches off:
    this is an error alarm requiring repair.
    Evidence to keep:
    cooldown time elapsed and button light behaviour when powered back on.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  2. Refill the water tank with fresh cold potable water and allow 5-minute pauses for large cups

    No special tools

    Who:
    you.
    How:
    remove, rinse, and fill the 1-litre water tank up to the MAX level with fresh cold potable water; if you have programmed a coffee volume above 150 ml, always let the machine cool down for 5 minutes before making the next coffee.
    Result that matters:
    normal water flow through the coffee outlet without triggering the alternating overheat flash.
    If coffee brews normally without alternating lights:
    the trigger was low water or back-to-back large volumes.
    If the lever also cannot be closed completely:
    empty the capsule container and check that no capsule is blocked inside.
    Evidence to keep:
    water tank level and programmed cup volume checked.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  3. Restore beverage quantities to factory settings if an oversized volume was programmed

    No special tools

    Who:
    you, with the milk jug removed.
    How:
    with the machine switched ON and the milk jug removed, press the milk button for 3 seconds to enter Menu mode (descaling and clean alerts blink), press the milk button once so it blinks, and press it again to confirm (all buttons blink 3 times).
    Result that matters:
    coffee volumes resetting to factory defaults (Espresso 40 ml, Lungo 110 ml) and the machine returning to ready mode.
    If all buttons blink 3 times and return to steady ready mode:
    factory volumes are restored.
    If you cannot enter Menu mode:
    make sure both the milk jug and the descaling pipe are removed and hold the milk button for 3 seconds.
    Evidence to keep:
    confirmation of the 3-blink factory reset signal.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  4. Check if the orange descaling alert is lit and run the 20-minute descaling cycle

    No special tools

    Who:
    you, with official Nespresso descaling agent.
    How:
    if the descaling alert shines steady orange in ready mode, empty the drip tray and capsule container, fill the tank with 100 ml of Nespresso descaling agent and 500 ml of water, plug the rear descaling pipe into the steam connector, and press the Espresso button.
    Result that matters:
    the machine completing the descaling and MAX-level rinsing cycles and switching off automatically when finished.
    If the orange descaling alert turns off after rinsing:
    scale restriction has been removed.
    If the alternating flash continues even when the machine is cold:
    call the Nespresso Club regarding your Lattissima One.
    Evidence to keep:
    state of the descaling alert light before and after the 20-minute procedure.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

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
Nespresso
Product type
Coffee machines

Known code variants

  • all coffee buttons and milk recipe buttons blink alternately
  • Lattissima alternating button lights
  • Lattissima One overheat flashing buttons
  • Lattissima sobrecalentamiento luces alternas
  • Nespresso Lattissima blocked 10 minutes after emptying
  • Nespresso Lattissima bloqueada 10 minutos vaciado
  • Nespresso Lattissima One botones café y leche parpadean alternativamente
  • Nespresso Lattissima One coffee and milk buttons flash alternatively
  • parpadeo alterno botones Lattissima One
  • todos los botones de café y recetas con leche parpadean

What it means

The official Nespresso Lattissima One User Manual and Machine Assistance page (model EN 500) state that when all coffee buttons and all milk recipe buttons flash alternatively, the machine has overheated and must cool down, or the appliance is in its approximate 10-minute blocked period after running the system-emptying cycle. During the emptying cycle itself, the coffee buttons also blink alternately until the unit switches off automatically. Other Nespresso series use different light codes, and this alternating flash alone never proves a component is defective.

Warnings and stop conditions

  • Higheditorial warning

    Do not touch surfaces that become hot during and after operation or descaling (such as the descaling pipe and milk spout), and never open the appliance housing.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  • Mediumeditorial warning

    If coffee volumes higher than 150 ml are programmed, always let the machine cool down for 5 minutes before making the next coffee to prevent overheating.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

Symptoms and causes

Probable causes · in order

  • Thermal overheating after repeated brewing or programmed coffee volumes above 150 mlCommon

    The manual cautions that if coffee volumes higher than 150 ml are programmed, there is a risk of overheating and the machine must cool for 5 minutes between cups.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  • Temporary 10-minute appliance lockout immediately following the emptying cyclePossible

    After running the 'Emptying the system before a period of non-use' procedure, the appliance remains blocked for approximately 10 minutes.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

  • Empty water tank or scale buildup increasing heating-block operating temperatureLess common

    Running the pump with an empty water tank or delaying descaling after the orange descaling alert illuminates increases thermal stress.

    Evidence: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

Virtual technician

Does PARPADEO-ALTERNO-CAFE-LECHE 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.

Start diagnosis

Sources and technical references

  1. 1

    Lattissima One | Machine Assistance | Nespresso

    Nespresso · 2026 · official_doc

  2. 2

    Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)

    Nespresso · 2026 · official_doc

Sources: Lattissima One | Machine Assistance | Nespresso · Nespresso Lattissima One User Manual / Manual de usuario (EN/FR/ES)reviewed 2026-10-18 · verified

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