Coffee maker won't turn on, EN 165 B Boiler thermal fuses burnt out, open.

ID: 219555

Description:

Steps:

1. Repair performed at Repair Café Palma – Spain, the machine was completely dead, it would not turn on.
2. Therefore, for the first check, you have to almost completely disassemble the machine; remove the 8 bottom machine screws from the base and remove the covers, which are snap-fitted, with the help of opening tools or a small spatula.
3. The first step is to check the continuity of the power cord and the switch; the next step is to check the 2 power input fuses located on top of the boiler.

4. During the teardown phase, I advise you to take photos of the entire process. Except for the bottom cover with 8 screws, the rest of the covers are snap-fit.
5. In this case, for example, we will take photos of how the 2 button boards are installed and which rubber button cover goes on each side (large or small cup).
6. Once the cover and the electronic board cover are removed, we check that there is no continuity to the blue and brown wires from the power plug, so we suspect that both thermal fuses on the power input cable are blown. Both protect the PHASE - LINE (BROWN) and NEUTRAL (BLUE) wires.

7. The assembly where the boiler is installed is pressure-fitted, so it can be removed by prying with medium/large screwdrivers to extract it.
8. WATCH OUT for the water supply tube; it tends to come loose, so we will need to snap it back into place later.
9. Having checked the 2 fuses, they are blown, so we proceed to replace them by twisting the wires together; note that you CANNOT solder them as the solder would melt due to the heat of the boiler.

10. Once the 2 blown thermal fuses have been replaced, before assembling the machine, check for continuity with a multimeter on the ohms scale, between the power input plug and the blue and brown wires of the electronic board, NEUTRAL and LINE.
11. Verify that there is continuity up to that point, then assemble the bottom part and test the machine.

12. Assembling the machine and fastening the 8 bottom machine screws with the homemade tool I made years ago for Nespresso coffee machines. I still use it today.
13. Homemade tool video:
14. In this case, a young upgrade kit from Repair Café Palma helped assemble the machine.

15. View of the finished machine, the table during a regular Repair Café Palma session, and a view of my box of electronic components, which have been used in multiple repairs.
16. Other guides for this machine. Personally, I do not like this model; it is robust, but it is somewhat complex to disassemble because everything is packed very tightly. Cafetera Delonghi EN 165