Tucked beneath the glass turntable, the microwave ring cover looks insignificant, yet it does most of the heavy lifting for every meal you heat. Its heat‑resistant plastic frame and small wheels keep the turntable gliding in a smooth, stable circle, so microwave energy can reach your food from all angles. When that ring is missing, dirty, or misaligned, the rotation becomes jerky or stops altogether, and the result shows up on your plate as cold centers, scorched edges, and frustratingly inconsistent reheating.

That small ring also protects the motor and base from strain, vibration, and noise. Operating without it can make the oven louder and slowly wear out internal parts, turning a simple oversight into an expensive repair or replacement. By cleaning the ring gently, keeping its wheels free of debris, and always placing it correctly under the tray, you preserve even heating, quieter performance, and the overall lifespan of your microwave.