A:Answer Hi Dsdy,
We understand your concern about the strong burning smell during preheating, especially after having no issues for a year. Here is a link to help guide you through the steps, following the instructions and hyperlinks.
Odor or smoke from Samsung oven
https://www.samsung.com/us/support/troubleshooting/TSG01110185/
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
When you message us, please provide us with this reference number (1147160395) to help our team gather your information.
Have a great day.
^Charles