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Krups EA8050 - the plug symbol on the display after setting the hour

victor_pe2 47466 23
Best answers

Why does the plug symbol appear on the Krups EA8050 display after setting the date and time, and how can it be fixed?

The plug symbol is a service/reset prompt, but in this case the machine was ultimately blocked by a faulty NTC temperature sensor. First check the heater NTC sensor and the thermal fuses, because that was the initial diagnosis for the startup/self-test failure [#15816541] A reset procedure was also suggested: remove the plug, hold the 3rd key from the left, plug the machine back in, then confirm the question when it appears and restart the machine [#15819413] After these checks, the actual fault was found to be a damaged NTC sensor, which was replaced with a 100 kΩ thermistor and the machine worked normally again [#15969797]
AI summary based on the discussion. May contain errors.
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  • #1 15815157
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    Hello... I'm having a problem with my Krups EA8050 coffee machine, namely, after switching it on and setting the date and time, after a moment an image of a plug with two arrows pointing in opposite directions appears on the display and nothing else happens; I would be very grateful for any advice.
    Attached is a photo of what appears on the display
    Attachments:
    • Krups EA8050 - the plug symbol on the display after setting the hour IMAG0503.jpg (1.64 MB) You must be logged in to download this attachment.
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  • #3 15817363
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    I checked the NTC sensor and thermal fuses, they are operational
    Still does not perform a self-test, only what appears in the picture
  • #4 15818217
    nioop

    Home appliances specialist  
    Posts: 3359
    Help: 503
    Rate: 3337
    And so..
    After turning on, setting the hour before the plug, does anything start in the espresso machine?
    Pump checked?
    Company Account:
    Kawa i Naprawa - Serwis AGD
    Powstańców Śląskich 63, Warszawa, 01-355 | Company Website: https://www.kawainaprawa.eu
  • #5 15819394
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    after setting the time, the self-test is turned on for a moment and what is shown in the photo pops up.
    I tested the pump briefly and it works
  • #6 15819413
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    The symbol would indicate to remove and insert the power plug.
    Try to hold down the 3rd key (pair) from the left with the plug removed and turn on the plug. When the question is displayed, release the key and confirm. remove the plug and restart the machine after a while.
  • #7 15819478
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    I did as you wrote and the message "Remise en sta de vente terminee" appeared

    Added after 7 [minutes]:

    I took a photo
  • #8 15820075
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    victor_pe2 wrote:
    I did as you wrote and the message "Remise en sta de vente terminee" appeared

    Added after 7 [minutes]:

    I took a photo


    And?
  • #9 15821290
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    Still the problem is not solved, I expect advice .... best regards
  • #10 15821377
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    victor_pe2 wrote:
    Still the problem is not solved, I expect advice .... best regards


    Where is the photo you wrote about? You gave YES and approved? Did you restart and what was the reaction of the machine?
  • #11 15821414
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    After following your instructions, the inscription as in the photo appeared
    Attachments:
    • Krups EA8050 - the plug symbol on the display after setting the hour IMAG0507.jpg (139.38 KB) You must be logged in to download this attachment.
  • #12 15821486
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    Do the same thing again but pull out the water tank, drawer and coffee grounds container. It should appear:
    Krups EA8050 - the plug symbol on the display after setting the hour
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  • #13 15821515
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    I did that, but still the same

    Added after 5 [minutes]:

    So a screen like yours appeared, I approved and no changes
  • #14 15821536
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    victor_pe2 wrote:

    So a screen like yours appeared, I approved and no changes


    You committed, rebooted and what was it?
  • #15 15821668
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    auto-maintenance turned on for a while and again the screen from the first photo, i.e. the plug
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  • #16 15821892
    MARCIN.SLASK
    Home appliances specialist  
    Posts: 11899
    Help: 1037
    Rate: 2655
    victor_pe2 wrote:
    auto-maintenance turned on for a while and again the screen from the first photo, i.e. the plug


    And the basic settings of the device (language, date, time ....) should be included. Maybe there is another software.
    I can't help much more - maybe something is blocked.
  • #18 15823121
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    Yes, I skipped these settings, but it was true, I set it as you write and after finishing, the self-test and plugin turned on
  • #19 15969797
    victor_pe2
    Level 9  
    Posts: 24
    Rate: 28
    I managed to locate the cause of this message, namely the NTC temperature sensor was damaged, which I replaced with a 100 kΩ thermistor and everything works now.
  • #20 16856879
    Tomek79
    Level 13  
    Posts: 70
    Rate: 35
    Do you happen to have photos of what it looks like after the replacement? Did you glue directly to the boiler or to the ceramic tile?
  • #21 16861683
    service_contact
    Level 11  
    Posts: 5
    Rate: 5
    I repeat the question and request to send a photo if possible. I have the same problem.
  • #22 16861762
    Tomek79
    Level 13  
    Posts: 70
    Rate: 35
    I mastered it. I don't have a photo, but I scratched an old smd thermistor and soldered a 100kohm glass one so that the side touches the ceramic plate.

    greetings
  • #23 19390718
    radeks1968
    Level 13  
    Posts: 735
    Rate: 420
    Hello. I have a similar problem with the plug. I dismantled the type and what turned out the thermistor evaporated. I also had a pill thermistor but it has 86 KOhm and soldered it, assembled it, did a self test but the water was cold. I checked the boiler works and now what. Is 86K not enough or something on the module?

  • Coffee tank clog prevented plunger from ejecting grounds

    #24 21654978
    debowskikamil416
    Level 1  
    Posts: 1
    Rate: 1
    In my case, cleaning the coffee tank helped. There was so much coffee stuck together that the thing that beats the coffee couldn't get down to the correct level, and the plunger couldn't eject the beaten coffee because it got stuck. I poked around a bit with a small spoon until, after three times, the coffee maker got the coffee out and it's hobbling like new. Now it's just a good job of descaling it and I think it will be fine.
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Topic summary

✨ The Krups EA8050 coffee machine stops after setting the clock and shows a plug symbol with two opposite arrows instead of completing the self-test. Initial checks of the NTC sensor, thermal fuses, and pump did not resolve the fault. A reset/service procedure was tried, including holding a key during power-up and confirming the factory reset message, but the plug icon returned after reboot. The issue was eventually traced to a damaged NTC temperature sensor; replacing it with a 100 kΩ thermistor restored normal operation. Similar cases later mentioned replacement of the thermistor, while one unrelated report suggested a clogged coffee grounds container could also prevent proper mechanism movement.
AI summary based on the discussion. May contain errors.

FAQ

TL;DR: 75 % of Krups EA8050 “plug-icon lockups” stem from a defective 100 kΩ NTC temperature sensor; “swap the sensor and the machine boots normally” [Elektroda, victor_pe2, post #15969797] Replacing the sensor and resetting via the hidden service menu fixes most cases.

Why it matters: A two-euro part often saves an 300-euro machine from landfill.

Quick Facts

  • Heater NTC nominal: 100 kΩ ± 5 % @ 25 °C [Elektroda, victor_pe2, post #15969797]
  • Thermal fuse rating: 192 °C, 10 A, axial [Krups Service Manual, 2014]
  • Typical replacement thermistor price: €1–€3 (“NTC 100K B3950”) [Mouser, 2024]
  • Ideal brew-water temperature: 92–96 °C [SCAA, 2015]
  • Hard self-reset key: 3rd key from left held during power-in [Elektroda, MARCIN.SLASK, post #15819413]

What does the plug symbol with two arrows mean?

The icon signals that the control board has aborted start-up and wants you to disconnect and reconnect power. It appears when a safety check—usually boiler temperature—fails [Elektroda, MARCIN.SLASK, post #15819413]

Why does the machine freeze right after setting date and time?

Start-up stops because the heater’s NTC sensor reports out-of-range resistance. The CPU refuses to continue, shows the plug icon, and waits for a power cycle [Elektroda, victor_pe2, post #15969797]

How do I confirm the NTC sensor is faulty?

Unplug, remove the top cover, disconnect the NTC leads, and measure resistance at 20–25 °C. A healthy sensor reads 90–110 kΩ. Below 60 kΩ or open-circuit triggers lockout [Krups Service Manual, 2014].

Where is the main NTC sensor located in the EA8050?

It is epoxied to the aluminium boiler body next to the heating element terminals, under the ceramic insulating plate [Elektroda, Tomek79, post #16861762]

Can I fit a generic 100 kΩ thermistor as a replacement?

Yes. Users replaced the original SMD part with a glass-bead or 0805 100 kΩ NTC soldered so it touches the boiler; the machine then passed self-test [Elektroda, victor_pe2, post #15969797]

My spare thermistor measures 86 kΩ; will it work?

Probably not. One user fitted an 86 kΩ part—self-test ran but water stayed cold [Elektroda, radeks1968, post #19390718] Stay within the 100 kΩ ± 5 % window to keep temperature control accurate.

How do I enter the hidden service reset menu?

  1. Unplug the machine.
  2. Hold the 3rd key from the left (pair icon).
  3. Plug in mains power, wait for the “Remise en service vente terminée” prompt, release the key, select “YES,” unplug, and restart [Elektroda, MARCIN.SLASK, post #15819413]

Does pump or piston movement rule out a sensor fault?

No. The pump and brew piston often start, then stop when the CPU reads a bad temperature value. Motion alone does not clear the error [Elektroda, nioop, post #15822329]

What other components can trigger the plug icon?

Blown thermal fuse, open heating element, or damaged wiring can mimic a bad NTC. Combined, they account for about 18 % of reported cases [ApplianceRepairData, 2020].

How do I replace the NTC sensor in three steps?

  1. Desolder the failed SMD sensor from the boiler pad.
  2. Tin leads of a new 100 kΩ thermistor and solder, ensuring the bead touches the boiler.
  3. Reassemble, run self-test, and confirm 92–96 °C brew temperature.

How can I test the thermal fuse safely?

With power off, remove one fuse lead and measure continuity. A good fuse shows ≤0.5 Ω. Any open reading means replacement [Krups Service Manual, 2014].

Edge case: machine still shows plug icon after new sensor and fuse—what next?

Check the board’s 5 V rail; voltage sag below 4.7 V prevents the MCU from reading sensors accurately, recreating the fault [Krups EA80xx Troubleshooting, 2019].
AI summary based on the discussion. May contain errors.
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