Does Nobody Ever Wonder Why a Fuse Blows?
So often on this forum I read where somebody is having or had an electrical problem only to discover that "it was just a blown fuse" or tripped breaker, as if that was the problem, and when they repla...
Forum Discussion
As said, how concerned to be depends on HOW the fuse opened. I recently replaced an open primary fuse in our 19 year old microwave for instance, that on inspection showed no signs of having actually "blown". It appeared that one end of the slow blow wire coil had simply detached from the end cap, likely due to many years of metal fatigue. Because of that, I felt pretty confident that simply replacing the fuse would bring the unit back to life, and that's exactly what happened. Several hours of use later, and the microwave is still working fine.
