A Sign Your Microwave Is Failing That You Didn't Notice
Some of the troubles you encounter with microwaves are going to be immediately obvious. For example, if it's sparking, emitting smoke; if there's a burning smell, especially if the food does not seem to be burning; or if the microwave is working while the door is still open. All of these are safety hazards. Stop using your microwave, unplug it, and call your local repair shop. There's one trouble that can sneak up on you, though.