Microwave makes crackling, popping, or arcing sounds inside the cavity during use

Safety first: Stop the microwave immediately if you see sparks or arcing. Unplug before cleaning or inspection.

• 1. Remove metal objects: Ensure no metal utensils, foil, or containers with metallic trim are inside.
• 2. Inspect waveguide cover: Locate the small mica or plastic cover on the side wall (waveguide cover). If it is burnt, cracked, or has holes, it must be replaced.
• 3. Clean the cavity: Thoroughly clean all interior surfaces with a mild detergent to remove grease and food splatter, especially near the waveguide cover. Dry completely.
• 4. Check cavity coating: Look for chipped or bare metal areas. Small chips can be touched up with microwave-safe cavity paint; larger damage requires professional attention.
• 5. Replace waveguide cover: Fit a Russell Hobbs-compatible waveguide cover cut to the correct size and shape.