Hi Sonia.
Thank you for reaching out regarding your Samsung - 1.9 Cu. Ft. Over-the-Range Microwave with Sensor Cook as the food is not cooking or heating fast, and if there is a setting to raise the temperature. I am sorry to learn your food is not heating fast. Regarding your concern, I will be providing you with a troubleshooting guide to assist you.
Samsung microwave is not working (Samsung microwave is not heating or has stopped working)
https://www.samsung.com/us/support/troubleshooting/TSG01207757/
As for your temperature, you can use the 10 power levels allow you to choose the optimal power level for your cooking needs.
I suggest you check this link to your user manual for assistance. Please go to page 16.
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
Thank you for being a valued customer of Samsung. Have a great day.
Reference Ticket Number: 1144601751
^Camille