The presence of a ceramic fuse ensures that an electrical surge is unable to harm the inner components of the microwave.
Ceramic fuse black line.
Product title 14qbp20csb microwave ceramic slow blow fuse 20 amp.
The fuse will be one to two inches long.
A ceramic fuse however shows no damage upon visual inspection.
To check a ceramic fuse use an ohmmeter or continuity tester.
Unlike glass fuses those ceramic fuses called current limiting fuses are very fast acting filled with sand that melts into glass shall a fault occur which is an insulator thus opening the electrical circuit.
It may be a glass fuse with a filament or a ceramic fuse.
Blade fuses are sometimes physically difficult to pull out but most vehicles come with a fuse puller tool that is located inside one of the fuse boxes or attached to a fuse box lid.
Testing a ceramic fuse is the only way to tell if the fuse has blown.
What does this mean.
So i bought fuses and replaced the old one.
So i took it apart and saw that the fuse had a black line going around the fuse.
It will show scorch marks and the filament will be melted.
It worked fine until i open the microwave door it blows every fuse i put in it.
Are they just made like that.
It s easy to tell if a glass fuse is blown.