Help - Ninja blender giving off a burning smell

A burning smell from a blender usually means either the motor is being overloaded, the drive parts are rubbing/slipping, or the motor itself is starting to fail.

1. Check whether it only happens under load If it smells normal when empty but burns when blending food, the motor may be struggling. Very thick mixes, overfilling, or running it too long can overheat the motor and coupler. Try a small amount of liquid and a lighter load.

2. Inspect the blade assembly With the appliance unplugged from the mains, remove the cup and blade unit. Check that the blades turn freely by hand. If they feel stiff, rough, or seized, the blade bearing may be failing, which can overload the motor and cause a hot/burning smell.

3. Look at the drive coupling Check the plastic/rubber drive on the blender base and the matching part on the blade assembly. If either looks worn, melted, split, or polished smooth, it may be slipping and giving off a burning smell.

4. Check for signs of motor trouble If the smell appears within seconds, even with no real load, and especially if there are changes in speed, unusual noise, sparking, or heat from the base, the motor windings or carbon brushes (if fitted) could be at fault.

5. Stop using it if the smell is strong A persistent acrid electrical smell is not something to ignore, as continued use can damage the motor further.

Always isolate the appliance from the mains before inspecting any internal parts. If the smell seems electrical or the motor base would need opening, I’d recommend a qualified appliance engineer or contacting Ninja support, as mains repairs need to be carried out safely.

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