On my ESAM4500/Rialto espresso maker, the Generic Alarm indicated that a thermal fuse had blown. The message may indicate other problems though.
Thermal fuses exist to prevent the unit from overheating but I think they can also simply wear out over time. On my unit, when I took off the back, there was a U-shaped boiler clearly visible and on that boiler there was a small fuse with a wire on each side - i.e. an inline fuse. This was the one that had blown and was preventing the unit from working. I went to ereplacementparts.com, found the part via their diagrams (which are fantastic), replaced the fuse and voila - coffee!
I can't find my original posting of this answer (with pictures) but I could probably track the pictures down if you need them. It was not a complicated fix once I knew what needed to be replaced.
The part was: http://www.ereplacementparts.com/tco-p-695163.html
Tco 5232105000 for DeLonghi Appliance eReplacement...
Buy DeLonghi Tco 5232105000 for your...
remove the power fuse
the fuse that the red wire gos into thats the power 
4,884 views
Usually answered in minutes!
×