A:AnswerHello Anonymous,
That’s a great question! The part is called a waveguide. Even though the waveguide has a metallic appearance, it is not metal. This part is essential to the operations of the unit and will not interfere in normal operations.
Thank you for your question.
A:AnswerI don't have an answer, but ours just stopped working as well yesterday. Same issue, turns on but is not heating. Just thought it odd that someone has the exact same issue less than 24 later.