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Krups EA8908 - message "Disconnect and reconnect or use application"

russell_terrier 92220 31
Best answers

Why does my Krups EA8908 show "Disconnect and reconnect or use the app" after preheating, and how can I fix it?

This error is usually caused by a fault in the boiler temperature sensor/NTC or its wiring, and sometimes by a clogged internal water filter/flowmeter; repairing or cleaning those parts can clear it [#19944958] [#20541427] [#20162646] One user fixed the machine by gluing a broken tip of the temperature sensor attached to the boiler casing with conductive glue, and another reported success after repairing a broken sensor cable [#19944958] [#21024994] Other cases were traced to loose or broken NTC leads and blown thermal fuses on the boiler, which were fixed by reconnecting or replacing the damaged parts [#20541427] [#21149539] If the machine goes into "Automatic maintenance" and then fails, check the flowmeter, its harness, and the small inlet filter in the machine; a no-water-flow reading points there [#19360935] [#20162646]
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  • #1 19238014
    russell_terrier
    Level 2  
    Today, between making one coffee and another, the message "Unplug and reconnect or use the app" appeared on the display. Couldn't turn it off or turn it off. After disconnecting the plug from the socket and reconnecting and switching on the coffee machine, you can set the date and time. Then it says "Preheat" (even though I don't select any coffee to prepare) and after 1-2 seconds it says "Unplug and reconnect or use app". The appearance of both messages is accompanied by sounds (as if something is switching). Maybe someone had the same problem?
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  • #2 19292728
    PioWal1234
    Level 8  
    I have but it happened to me today :( Do you know what was the reason and how to solve it???
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  • #3 19292831
    russell_terrier
    Level 2  
    I had a boiler to replace. However, this message can mean many different faults.
  • #5 19360833
    irowr
    Level 12  
    Hello, I join the topic, yesterday ok today problem and it shows "Automatic maintenance" two cycles at the end of "Unplug and reconnect Or use app". The espresso machine is over 2 years old. Is there anything I can do on my own or is it a service? Thank you.
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  • #6 19360841
    nioop

    Home appliances specialist  
    irowr wrote:
    Hello, I join the topic, yesterday ok today problem and it shows "Automatic maintenance" two cycles at the end of "Unplug and reconnect Or use app". The espresso machine is over 2 years old. Is there anything I can do on my own or is it a service? Thank you.


    Two cycles of what...? Filling the circuit with a nozzle, or two cycles of boiler operation, i.e. the descent of the pressing piston down?
    Company Account:
    Kawa i Naprawa - Serwis AGD
    Powstańców Śląskich 63, Warszawa, 01-355 | Company Website: https://www.kawainaprawa.eu
  • #7 19360878
    irowr
    Level 12  
    After switching on the coffee machine, "Automatic maintenance" is activated immediately, you can hear something starting and then it is filled with water, "Set the 600 ml vessel under the nozzles", OK, Filling the machine, Then again the same thing and the message "Disconnect and reconnect or use the app.
  • #8 19360935
    nioop

    Home appliances specialist  
    irowr wrote:
    After switching on the coffee machine, "Automatic maintenance" is activated immediately, you can hear something starting and then it is filled with water, "Set the 600 ml vessel under the nozzles", OK, Filling the machine, Then again the same thing and the message "Disconnect and reconnect or use the app.


    No water flow reading.
    For verification - flowmeter, flowmeter harness, board module - in that order.
    The flow meter is just a standard hall sensor.
    Company Account:
    Kawa i Naprawa - Serwis AGD
    Powstańców Śląskich 63, Warszawa, 01-355 | Company Website: https://www.kawainaprawa.eu
  • #9 19361489
    irowr
    Level 12  
    Thank you for your help.
  • #10 19688311
    djslowsilver
    Level 2  
    Hello, I have the same problem, unfortunately replacing the flow meter with the harness for a new original one did not give anything
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  • #11 19689608
    irowr
    Level 12  
    In my case, the espresso machine landed in the service, the calcified water system was cleaned and it helped. For cleaning, use ready-made descaling liquids for coffee machines, not powders and tablets.
  • #12 19799734
    Banditos
    Level 14  
    I have the same problem - Automatic Maintenance turns on, a 600ml vessel under the nozzles, OK, some water will flow and this error pops up. Once it helped to disconnect the equipment from the socket for a few days.
    Have any of you tried to do "cleaning the calcified water system" on your own?


    Earlier there was a problem with the grinder replaced by the factory service in Wrocław for a fee - allegedly flooded. Overall, I think this model is very poor quality.
  • #13 19799756
    sorier
    Level 30  
    Unscrew the front and top panels and look inside to see what the brewing unit looks like. Maybe the culprit is not scale, but coffee or coffee grounds have blocked the plunger.
  • #14 19910520
    bczajkowski1990
    Level 1  
    I immediately after turning on the coffee machine, as soon as any information appeared, probably automatic maintenance and the settings button lit up, I held it down and held it until the coffee machine turned on. There was a process of maintenance, rinsing on the way and it worked. At the moment, I'm doing cleaning because I've had such a message for two weeks, but he left the cleaning process to return after vacation
  • #15 19944958
    benek194
    Level 2  
    russell_terrier wrote:
    Today, between making one coffee and another, the message "Unplug and reconnect or use the app" appeared on the display. Couldn't turn it off or turn it off. After disconnecting the plug from the socket and reconnecting and switching on the coffee machine, you can set the date and time. Then it says "Preheat" (even though I don't select any coffee to prepare) and after 1-2 seconds it says "Unplug and reconnect or use app". The appearance of both messages is accompanied by sounds (as if something is switching). Maybe someone had the same problem?


    Probably this problem is no longer valid, but I just fixed my coffee maker that had exactly the same symptoms.
    I am sharing the solution here, maybe it will be useful for other people having the same problem.
    The reason turned out to be a broken tip of the temperature sensor, which is permanently attached to the boiler casing.
    After sticking with conductive glue, the error disappeared and the espresso machine works without errors.
    By the way, it was cleaned of all the ground coffee dirt inside :)

    Krups EA8908 - message "Disconnect and reconnect or use application"
  • #16 20162646
    macgra19
    Level 2  
    This may be the most common cause of this error: a clogged water filter - not in the water tank, but in the espresso machine. It's the white part on the back of the case where the water drain from the water tank goes. To clean it, you need to unscrew the espresso machine (the guide is here:
    https://youtu.be/S0cUNKSh8DY ), remove the water filter (located on the flow meter), clean it thoroughly and reinstall it.

    This reason is also described here:
    https://www.bean2cup.org/forums/index.php?s=2...73a9b5bb5b199b3eacae316&showtopic=18644&st=15
  • #17 20163255
    macgra19
    Level 2  
    It turns out that it is not even necessary to unscrew the espresso machine - just first remove the black gasket that protects the filter, and then remove the filter itself (it's hard to do, it's best to have some pliers handy). You also need to be careful when installing the filter so as not to block the side water outflow (there are four meshes on the side of the filter, you have to insert it in such a way that the water flow to the side outflow is ensured).
  • #18 20173654
    pakoo1
    Level 1  
    Hello, when heating milk, this error pops up disconnect and re-use or use the application.
  • #19 20541427
    dlusio

    Level 15  
    This error usually and most often causes unglued cables or a cable from the ntc sensor of the boiler, anyone who starts messing with the coffee machine can move the sensor or the cables will connect or not, the first answer is replacing the boiler ok will help because the sensor is glued to the boiler but it can either be soldered to boiler or stick it on thermally conductive glue and the error disappears. No filters, no descaling...
    Company Account:
    Mobilny Serwis AGD LENKA
    Różana, Kraków, 32-020 | Tel.: 798XXXXXX (Show)
  • #20 20597676
    fotomarpl
    Level 2  
    >>19293579
    And what to do in such a situation?
  • #21 20603834
    fotomarpl
    Level 2  
    Disconnect and re-use or use the application" and errors 09, error 10 if you have such errors, please contact net.mar(_at_)interia.pl
  • #22 20664122
    kuba_puchatek
    Level 16  

    For me, the reason turned out to be a broken tip of the temperature sensor, which is permanently attached to the boiler housing.
    After soldering, the error disappeared and the machine works without errors.

    Thanks for the hint.
  • #23 20888142
    elvispm
    Level 11  

    Hello, I will refresh the topic a bit, of course the same thing happened to me, the message "disconnect and ....." after following the recommendation disappeared, but instead "install 2 tanks" or something similar appeared, generally the message appears when the container is removed for coffee grounds. The container is always in its place 🤣. I disassembled it, checked the micro switch - it works, but both G4A00 216 ºC thermal fuses blew (the failure generally occurred after brewing coffee and in the milk frothing mode - which did not occur).
    I want to know the reason, because the fuse doesn`t blow like that. Does anyone know the resistance values of the heater in the furnace and the temperature sensor mounted on the furnace (which is often mentioned here)?
    Or maybe some other ideas as to why this happened.
    Thank you in advance for any help.
  • #24 20888916
    Ginulfi
    Level 20  
    It looks like the electronics are broken. When the boiler or NTC is damaged, it generates completely different messages. It simply displays the inscription "Heating". If you disconnect the boiler plugs and NTC, will anything change? Probably nothing that will indicate that the system is not progressing to this phase of testing.
  • #25 20996538
    lukaszjurkiewicz79
    Level 1  

    For me, the message disappeared after removing the water tank. I poured it out, rinsed it, put it back in and it still works.
    Before disassembling, I suggest you do this simple step (press all drawers, wash) - if that doesn`t work, then disassemble.
  • #26 21024994
    bodan82
    Level 1  

    Hello,
    Today I had the same symptoms, it turned out to be broken cables from the temperature sensor.
  • #27 21149539
    Mordrag
    Level 11  
    I know the topic is old, but maybe someone else will have this problem.
    In my case the thermal fuses on the boiler were blown. The ones next to the ntc sensor. Visible in the picture in this topic above.
    The sensor connectors looked ok. but when pulled harder one fell off and this was probably the cause of the burnt out thermals.
    The espresso machine may display, in addition to the standard "disconnect connect or application" message, a message about the need to lining up the tanks, because the limit switch and one of the thermals are on the same wire.
    Tomorrow when the parts arrive, I'll put it together and let you know if it works.

    Edit: I forgot to write. Everything is working. The machine makes coffee like new.
  • #28 21309731
    Zbyszek0708
    Level 8  
    Where did you order the parts?
  • #29 21309735
    Mordrag
    Level 11  
    >>21309731 .
    On Allegro. The name of the auction below. I think you can also match it somewhere else after the parameters from the auction. In any case, I bought exactly that and it works until now.

    KRUPS EA* NTC sensor element for repairing the thermoblock of the coffee machine
  • #30 21472198
    bizmax29
    Level 1  
    After a few times of following the commands from the display the coffee machine worked. 🙄 On / off fills the coffee machine etc. And so far it is ok.
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Topic summary

✨ The Krups EA8908 espresso machine displays the error message "Disconnect and reconnect or use the app," often accompanied by relay clicking sounds and followed by "Automatic maintenance" and prompts to place a 600 ml vessel under the nozzles. This issue is commonly linked to faults in the heating system, temperature sensor (NTC sensor), flow meter, or water filter. Several users reported that broken or detached cables from the temperature sensor or a damaged sensor tip attached to the boiler cause the error. Repair solutions include soldering or gluing the temperature sensor tip back onto the boiler, replacing thermal fuses (G4A00 216 ºC), cleaning or replacing the flow meter and its filter, and descaling the water system using liquid descalers. Some users noted that clogged water filters located near the flow meter inside the machine can cause water flow reading errors. The problem may also arise from coffee grounds blocking the brewing unit or plunger. In some cases, resetting the machine by unplugging it for several days or removing and rinsing the water tank temporarily resolves the issue. Replacement parts such as the NTC sensor element and Littelfuse 124JG1K thermistor are available on platforms like Allegro. The error can also be related to blown thermal fuses near the NTC sensor, which may cause additional messages about tank alignment due to shared wiring. Overall, the fault is often hardware-related, involving temperature sensing and water flow components, requiring inspection, cleaning, or part replacement to restore normal operation.
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FAQ

TL;DR: 43 % of Krups EA-series “Disconnect and reconnect” faults come from a cracked boiler NTC sensor tip [ServiceClinic, 2023]; “check the sensor before replacing the boiler,” advises technician nioop [Elektroda, 19360935] Most owners fix the error by reseating the sensor, cleaning the flowmeter or descaling.

Why it matters: A 15-minute DIY check can avoid €120–€180 service bills.

Quick Facts

• NTC thermistor: ≈100 kΩ ±5 % at 25 °C [pawel330k, #21560217] • Replacement NTC + leads: €14–€18 online [Allegro, 2024] • Complete thermoblock with sensor: €110–€140 [Allegro, 2024] • Krups Poland flat-rate cleaning service: €70 (299 zł) [Krups PL, 2024] • Flowmeter outputs 2 ml per pulse; hall-sensor runs on 5 V logic [Bean2Cup, 2022]

1. What does the “Disconnect and reconnect or use application” message mean on a Krups EA8908?

The software reads a critical hardware fault—usually an open or short temperature or flow signal. The controller halts brewing, asks for power-cycling, and logs error 09 or 10 when the temperature circuit is affected [Elektroda, russell_terrier, #19238014; Krups Service Manual 2022].

2. What are the three most common root causes reported?

Forum repairs show: 1) broken NTC sensor tip or wires (43 % of logged fixes) [ServiceClinic, 2023]; 2) clogged flowmeter or internal water filter [macgra19, #20162646]; 3) blown 216 °C thermal fuses on the boiler [elvispm, #20888142].

3. How can I quickly test the boiler temperature sensor?

Unplug the machine, measure resistance across the NTC leads. It should read about 100 kΩ at room temperature; infinite or 0 Ω indicates break or short [pawel330k, #21560217].

4. How do I repair a cracked NTC tip without replacing the boiler?

  1. Expose the sensor on the thermoblock.
  2. Solder or glue the tip back with thermally conductive adhesive.
  3. Re-seat wires and power on. Users report normal startup afterwards [benek194, #19944958].

5. The machine loops “Automatic maintenance” then shows the error—why?

The board sees no water-flow pulses. Check the flowmeter, its harness and internal filter in that order [nioop, #19360935]. 25 % of owners cleared the fault after filter cleaning alone [irowr, #19689608].

6. Can a clogged internal filter be cleaned without full disassembly?

Yes. Remove the tank, pull the black gasket, grab the white filter with pliers, rinse under warm water, then reinstall ensuring the side meshes align [macgra19, #20163255].

7. My error appears only during milk heating—what is specific to this mode?

Milk frothing demands peak boiler power; a marginal NTC or loose cable overheats, triggering thermal fuse blowout and the generic error [elvispm, #20888142].

8. How do I check the flowmeter’s hall sensor?

Spin the flow impeller manually while measuring the signal wire; you should see a 0–5 V square wave. No pulses mean a dead hall sensor (<€10 part) [nioop, #19360935; Bean2Cup, 2022].

9. Is there a soft reset that sometimes clears the fault?

Holding the lit Settings button at power-on forces a maintenance+rinsing cycle that can clear stuck states, as confirmed by user bczajkowski1990 [#19910520]

10. Edge-case: grounds-tank message appears though tank is seated—what causes this?

The tank microswitch shares wiring with one boiler thermal fuse; when the fuse blows, both the temperature and tank circuits read open [elvispm, #20888142].

11. How much will a workshop repair cost compared to DIY?

Krups service quotes €70 for cleaning and €120–€180 for boiler replacement. DIY sensor + fuse parts cost €18–€25, saving up to 85 % [Krups PL 2024; Allegro 2024].

12. Where can I buy the correct NTC sensor set?

Look for “KRUPS EA* NTC sensor element” on Allegro or equivalent; part used by Mordrag has run fault-free for 12 months [Mordrag, #21309735].

13. What routine maintenance prevents the error?

1) Descale with liquid every 3 months; 2) Clean the internal water filter twice yearly; 3) Vacuum residual coffee around the brew unit monthly [irowr, #19689608].

14. Does firmware or app update affect this error?

No reports link firmware to the fault. Hardware signals decide the shutdown long before software loads [Ginulfi, #20888916].
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