Microwave turns on by itself

The vent fan on your over-the-range microwave is useful for keeping smoke and steam clear from the microwave. It will even turn on automatically if the microwave is getting too hot. But if the fan strength isn't strong enough to hold up a napkin, you may feel like it's not working. Fortunately, there's an easy way to tell.

If your microwave is not working or has stopped working, there could be a few reasons why. A microwave that is not turning on or is turning off by itself is usually caused by overheating or a low power supply. However, if your microwave doesn’t heat up at all, it could be in Demo mode. You can check your microwave for signs of overheating and power

Your microwave's door isn't completely sealed so when condensation forms on the outside, some of it may get inside or between the glass panes. The most common form of condensation on the inside comes from the food you're cooking.

All microwaves have a magnetron cover, although the appearance will vary between models. On many Samsung microwaves, the magnetron cover may look like a piece of cardboard and you might wonder why it's there. You may also see some plastic film on the microwave's door on some models. This guide will explain which items you can remove and which ones

The term "arcing" refers to sparks inside the microwave oven. These sparks are caused when microwaves react to gold paint on dishes, twist ties and other metallic materials, like aluminum foil. Usually, removing these kind of objects will fix the problem.