The fuse is generally located on the bottom of the chassis of the microwave. You have to remove the outer cover on a counter top model - or the front panel assembly on an over-the-range model. There are several reasons why it may blow. If the fuse is loose in the holder, the fuse and the holder should both be replaced. If - with the microwave disconnected from the wall - you can easily turn the fuse with your fingers while it's in the holder, then it's too loose. What happens is the loose connection generates too much heat, causing it to melt internally. If so, you'll usually see a ball of solder at a point where the cap meets the body of the fuse. If the fuse blows as soon as you plug the oven in the wall, or when you open the door, the problem is likely with the door switches. You can find my files "doorsw.txt" and "safety'txt" via Google. They give you the safety warnings and cover the diagnosis and replacement of the door switches. If the fuse blows as soon as you hit START, then it's likely that you have a shorted high-voltage capacitor. If the fuse blows a few seconds after you hit START, then it's likely that you have an overheating / shorting high-voltage transformer. If you still have a problem, please wirte back with more detail. Be safe!
828 views
Usually answered in minutes!
We recently had a power surge and our microwave seems completely dead. The outlet where the microwave plugs into tests fine. I have tried the microwave on different outlets and still no power. Could this be a blown fuse within the microwave? If so, would it be safe for me to replace it?
Different Brand of Microwave, but totally dead. It's hard to take the cover off to get at the fuse, since there is a special screw holding on 2 of the corners, probably to prevent me doing that.
×