![It's a piece of thin cardboard, but I don't understand why it's inside this Kenmore 790.80333310 microwave oven. Any guesses what function it serves? : r/whatisthisthing It's a piece of thin cardboard, but I don't understand why it's inside this Kenmore 790.80333310 microwave oven. Any guesses what function it serves? : r/whatisthisthing](https://i.redd.it/pygkzngisut01.jpg)
It's a piece of thin cardboard, but I don't understand why it's inside this Kenmore 790.80333310 microwave oven. Any guesses what function it serves? : r/whatisthisthing
![Microwave Oven Mica Plate Sheet, 5 Pieces Waveguide Covers Microwave Oven Parts Microwave Oven Mica Piece, Microwave Cardboard Shield Replacement Repa | Fruugo AU Microwave Oven Mica Plate Sheet, 5 Pieces Waveguide Covers Microwave Oven Parts Microwave Oven Mica Piece, Microwave Cardboard Shield Replacement Repa | Fruugo AU](https://img.fruugo.com/product/1/91/985891911_max.jpg)
Microwave Oven Mica Plate Sheet, 5 Pieces Waveguide Covers Microwave Oven Parts Microwave Oven Mica Piece, Microwave Cardboard Shield Replacement Repa | Fruugo AU
![Microwave Oven in Carton Cardboard Box. E-commerce, Internet Online Shopping and Delivery Concept Stock Illustration - Illustration of packaging, delivery: 103724839 Microwave Oven in Carton Cardboard Box. E-commerce, Internet Online Shopping and Delivery Concept Stock Illustration - Illustration of packaging, delivery: 103724839](https://thumbs.dreamstime.com/z/microwave-oven-carton-cardboard-box-e-commerce-internet-onl-microwave-oven-carton-cardboard-box-e-commerce-internet-online-103724839.jpg)
Microwave Oven in Carton Cardboard Box. E-commerce, Internet Online Shopping and Delivery Concept Stock Illustration - Illustration of packaging, delivery: 103724839
![A piece of cardboard from inside the Whirlpool microwave started going off, anyone know what this piece is? : r/whatisthisthing A piece of cardboard from inside the Whirlpool microwave started going off, anyone know what this piece is? : r/whatisthisthing](https://external-preview.redd.it/j5SiVTAcz8prAhOmXM7Cpvc07s3iUrJoTdTCPbHbxgU.jpg?auto=webp&s=84c09c2ecf4c575a5c1f2bf2c564f09dfa78eb33)