A:Answer Hello Christian,
Thank you for reaching out and sharing your feedback with us about your Samsung microwave. I understand your microwave doesn't heat anything and there's no instruction on how to get out of the demo mode. We do apologize for the inconvenience this has caused you. We are here to help.
To help you with this, I am providing this link https://www.samsung.com/us/support/troubleshooting/TSG01001963/ to guide you on the issue. It has the step by step instructions on how to get out of the demo mode.
You can also check this link https://downloadcenter.samsung.com/content/UM/201904/20190417133913565/MC12J8035CT_AA_DE68-04367A-04_EN.pdf for the user's manual. Just go to pages 37, 38, and 39 for the troubleshooting guides for your microwave.
Another link you may find useful is this one https://www.samsung.com/us/support/search/?query=microwave&referrerPageUrl=https%3A%2F%2Fwww.samsung.com%2Fus%2Fsupport%2F as it has all the troubleshooting guides, links, videos, and other resources you might need for your Samsung microwave.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Your reference number is 1144346839.
-Noraina