If your toaster is blowing a fuse check to make sure there are no particles lodged in the heating elements.If you can see something caught, unplug the toaster and ensure it cools down completely, remove and empty the crumb tray. Tip the toaster upside-down and gently shake to remove the caught object.Refit the crumb tray and plug in the toaster, it should now be ready to use again.
