How Do I Know If My Microwave Fuse Is Blown?
If your microwave isn’t turning on or isn’t heating food, it may indicate a blown fuse. You can check the fuse by unplugging the microwave and removing the cover. Locate the fuse near where the power cord enters the microwave and check if the thin wire inside the fuse is broken or damaged. If it is, then you need to replace the fuse with a new one of the same rating. If the new fuse blows again, it indicates an underlying issue with the microwave and it should be checked by a professional.