ECAM 26.455 MB no milk foam

Hello,

I have already carried out some tips from various forums, unfortunately without success.
Current status of my ECAM 26.455 MB
- machine makes steam
- steam comes a little delayed, and then a little longer than desired
- machine does not suck milk from the container

I have checked:
- head of the milk container disassembled and completely cleaned --> ok
- seals at the transition machine / milk container --> ok
- suction hole at the transition machine / milk container is free --> ok
- test program called and all valves checked.
The valves all produce a well audible "clack" when switching
and in the "on" state you can hear a slight 50Hz hum.
So in my opinion they are ok

I am currently quite clueless as to what else I could check.
Do you have any tips for me?

Thank you and best regards

Wolfgang

DeLonghi ECAM 26.455 MB

Hello, if your Delonghi has a steam heater, then check the thermal fuses. Here arise bad errors already when measuring, there must be no voltage drop measurable during heating.
Why? So much steam must be generated that a negative pressure (Venturi principle) is generated.
Google helps with the explanation.

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Hi Chris,

Thanks for your tip and help. I'm afraid I have to ask a few things because I don't know enough (yet) :-)

I'm not sure what exactly you mean in your answer. As described, my machine produces plenty of steam when I want to make milk foam.

- Can it really be that the thermal fuse has a problem?-
- What exactly does the thermal fuse?
- Does it become high resistance when something gets too hot and would thus limit the steam production?
- Could the thermal fuse explain that steam is produced a little longer than requested?
- Could it be that a lot of steam comes, but the pressure is still not sufficient?

Many greetings

Wolfgang

Hello Wolfgang a lot of steam is always good.
The thermal fuses in the steam generator are fuses that switch off in the event of too high a temperature, so it triggers.
If enough steam is generated, I hope in your case also, then the connector could have a hairline crack, as first I would change if not already done the O-rings on the connector and wetted with silicone grease something (at regular intervals).

So now times the horse from the front.
Steam quantity is not equal to steam quantity.
Relatively speaking, a small amount of steam can look like more than it actually is.
If you don't already descale again with descaler on amidosufonic acid, Watch out for this ingredient. Eilfix, Durgol. Or in the bay or Amazon.

So dan first work off the last step and then the other things.

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Thank you very much for all your advice and support!

I have decalcified the machine several times. In addition, we have quite soft water (6°dH)
Error pattern is still the same.

Now I have opened the machine. Inside everything is dry, there is also no steam coming out inside. The solenoid valves EV1 and EV2 are definitely working. You can hear them clacking loudly and with a match touched I can feel the vibration from the movement.

EV3 is quieter to hear. Here I am not sure because I could not feel the jerk.
Do you happen to know where exactly EV3 is located?

By the way, here is another video of the exact error pattern. Maybe it helps with the assessment.

Sorry I have not been here for a while.
As you can see in the video, it does not draw a vacuum but rather presses into the carafe.
So why? Check the thermo sensor for the instantaneous water heater or steam boiler. Steam should be coming more.
I do not know your KVA now by heart.
Oh yes, the clacking of the valves is not necessarily ....
Maybe you have someone who has an identical construction and you could change the carafe.
Furthermore, change the adapter for the carafe.

But above all, steam must come that the Venturi principle also works.
Pump capacity? Heating or steam circuit is hot enough.
Thermocouple should have 110-120 KOhm at room temperature.

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