DeLonghi pulling cold coffee usually the heater fuses?

is there a way to add an inline temperature sensor that will allow me to monitor the coffee machine’s boiler prior to the failure of the fuse?
 
Regarding the causes of blown fuses here's what I've found in my 15+ coffee machines: 90% are due to scale in the boiler from using hard water that hasn't been descaled in a while. 5% of the time the machine ran dry and the thermal fuse on the heater is meant to act as a safety cutout to prevent overheating of the element in such situations. The other 5% of time it's simply aging and the thermal cycling of the machine with time.
 
Regarding the causes of blown fuses here's what I've found in my 15+ coffee machines: 90% are due to scale in the boiler from using hard water that hasn't been descaled in a while. 5% of the time the machine ran dry and the thermal fuse on the heater is meant to act as a safety c…

the other 5% of the time it is the tank seating. I had the same issue on my Magnifica and it ended up being the float sensor in the tank that was the issue.
 
The generic fuse will work just as well but ensure that the temperature is correct and that the fuse is rated for at least 10 amps. A 5 amp fuse will blow in less than a day on some machines because the heater draws more current than that.