This is FIXYA. You have mistakenly posted a question on the internet, but it is not a FIXYA toaster.
FIXYA does not sell or service toasters.
Ask of trusted friend or relative to help you find out where you can get assistance with you toaster, or return it to the store you purchased it from.
If I have the model number correct ... that is a fairly deep oven that has multiple heating elements. One of your elements may have died, resulting in lower temperatures.
Hello, Patricia -This is the link to the Black & Decker Contact Us page:https://www.blackanddecker.com/en-us/support/contact-usIn the upper right corner of that page you will see the link to Register a Product. Click or tap on that link.Follow the on-screen instructions. Note: Probably the box in which your countertop oven came or the user instructions for the oven have the web address you need to visit in order to register the oven.Best wishes.