Ceramic Fuse Black Line

It will show scorch marks and the filament will be melted.

Ceramic fuse black line.

A ceramic fuse however shows no damage upon visual inspection. A homeowner can determine if a glass fuse in blown by performing a visual inspection and looking for a break in the thin wire and a brown discoloration in the center of the fuse. Testing a ceramic fuse is the only way to tell if the fuse has blown. The presence of a ceramic fuse ensures that an electrical surge is unable to harm the inner components of the microwave.

It may be a glass fuse with a filament or a ceramic fuse. To check a ceramic fuse use an ohmmeter or continuity tester. The fuse will be one to two inches long. So i took it apart and saw that the fuse had a black line going around the fuse.

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. Product title 14qbp20csb microwave ceramic slow blow fuse 20 amp. It worked fine until i open the microwave door it blows every fuse i put in it. It s easy to tell if a glass fuse is blown.

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. So i bought fuses and replaced the old one. Although it is fairly easy for a practiced eye to identify car fuses on sight you can also look at a visual guide to help determine which type of fuse you need to.