Our Samsung microwave ME20H705MSS Serial # HIDDEN turned on by itself today - would not have know if the fan motor hadn't started running and it wouldn't cut off....it got extremely hot inside. We use the microwave solely to heat up coffee or warm something - have not used it to cook.. and couldn't figure out how it got so hot. We installed it end of 2018.
This is something that will need to be looked into further. Please send me a private message with a photo of the serial number as the one you've provided isn't pulling up in my system. http://bit.ly/2sSxapD
Could you provide a closer image? We're unable to make out the letters on the label.