Garbage disposal is unusually loud compared to previous operation, with a harsh grinding sound even when empty.

Safety first: Isolate power before inspection.

• Inspect chamber: Use a torch to look at the shredder ring teeth. Excessive rounding, chips, or uneven wear can cause harsh noise.
• Check for loose parts: Gently move the impeller lugs with a wooden tool. Excessive play or visible damage indicates wear.
• Avoid hard items: Stop grinding bones, shells, or other very hard materials that accelerate wear.
• Plan for replacement: The shredder ring and impeller plate are typically not user-replaceable on Rangemaster domestic units. If noise is severe and persistent, replacement of the disposal is recommended.