If the fuse holder on your Tuttnauer 2340M Autoclave has melted, it is imperative you determine what caused it to melt before replacing it
And, there are only 2 possible causes for the fuse holder to get hot enough to melt
The first thing you will want to do is to remove the cabinet from the autoclave, so you have access to all of the internal components, then proceed as follows:
If you are unable to locate any short circuits from the above procedures, then a power surge is the most likely culprit
And the best thing you can do is to prevent it from happening again