You can determine if your garbage disposal needs to be replaced by looking for several clear warning signs, such as frequent electrical breaker trips, persistent motor humming without the blades spinning, repeated jamming, or cracks in the metal or plastic housing that cause water leaks under the sink. If your disposal is more than 10 to 12 years old, requires constant manual resetting, or emits a burning electrical odor when turned on, replacement is usually more cost-effective than repairing it.
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