Chosen Solution
The image that appears on the display when the service door is open, doesn’t go off after closing the door. It used to happen intermittently but now it’s all the time, completely preventing the machine from working. Anyone knows what kind of detector triggers it and where is it? The door closes fine and flush, there is nothing blocking, the magnets latch.
Hi @xavierap , What is the model number of the coffee machine? I don’t know the answer but looking at the Moltio Super HD8767/47 parts list there is a door reed sensor listed. Presumably it is operated by a magnet when the door is closed. Check if there is one and if it is connected securely and working. Try using a magnet near it to see if you can make the error message disappear when the door is open. Note: Due to the way the URL is shown I cannot link the exact page in this answer in the 1st link above. Type HD8767/47 in the Enter a model# part# or description find? search box to get the parts list. Then type Sensor in the Filter by description search box on the parts list page to view all the sensors in the machine. It gives the location of the sensor but unfortunately I cannot find a parts diagram. If you have a different model just type the full model number in the search box in the 1st link above to hopefully find the parts list for your exact model. Hopefully this is of some help.
Sorry, I did not notice your question earlier. Otherwise my first guess would have be the switch. Parts for the Moltio are easily available at e.g. www.juraprofi.de or www.komtra.de. Your switch here.
Fixed it finally. Reached under the top cover by trial and with the help of the disassembly guide here. The failure mode was clear (see attached picture): the contacts of the interruptor were completely corroded. The steam coupling above seems to leak, there are remains visible. I should have replaced the corroded crimp connectors. Instead I have removed the interruptor detecting door closure and shorted the wires together. This one won’t bother me again. The machine works now. Many thanks to @jayeff for all the pointers.
