When your ninja detect duo power tb301 is most likely to develop issues, based on community repair data and manufacturer patterns.
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The most common failure types, sorted by when they typically appear.
Rubber gasket between the blade assembly and jar hardens, cracks, or tears from heat exposure, detergent degradation, and age. Causes leaks from the bottom of the jar during blending, potentially dripping into the motor base.
Internal thermal fuse or overload protector trips from motor overheating. Resettable overload switches can be reset after cooling, but repeated trips degrade them. Non-resettable thermal fuses blow permanently, requiring replacement.
The coupling (or drive socket) that connects the motor shaft to the blade assembly strips its teeth, cracks, or wears smooth. This is an intentional weak point — designed to fail before the motor does. Motor runs but blades don't spin.
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