I replaced the thermal fuse about 9mo. ago, My wife ran the oven cleaner and the fuse went out again. This has been a problem from day one I believe. Is there something wrong with the size of the fuse or the oven it self? when I got the last fuse it was a changed from the original.
The fuse rating has changed on these to help prevent nuisance tripping, but the more likely cause is a slow running cooling fan. When you replace the new fuse, start a cycle so you can visually see the fan running and make sure you feel air flowing out the front. The other suggestion is when you look at how the fuse mounts to the back panel, look just above that point and you will see another screw that can be removed. Move the entire fuse up to that screw point and use the previous upper screw point for the new lower point. This puts the fuse closer to the cooling fan and reduces the risk of it failing unless there is a real problem.