Hi Lolita,
We're glad that you're using our Samsung microwave! Let's help you with your unit.
Below is a link for more information on how to troubleshoot your appliance.
Samsung microwave is not heating or has stopped working:
https://www.samsung.com/us/support/troubleshooting/TSG01001963/
We would like to inquire further about your microwave to assist you better.
Please feel free to get back to us via the following options for further assistance:
1. Samsung: Community smsng.us/Samsung-Community
2. Facebook: smsng.us/Facebook-Messenger
3. Twitter: smsng.us/Twitter-Messages
When you message us, please provide them with this number 1144971143 to help our team pull up your information.
Have a great day.
^Chrystel