Diagnosis
Your Ninja UltraCrush Professional Blender is displaying an "Er" error code, which indicates a motor overload. This typically happens when the blades are obstructed by a jam, the pitcher is overfilled beyond its maximum liquid capacity, or the motor has overheated from prolonged use or a very thick mixture.
How to Fix It
Follow these steps to clear the error and safely resume operation:
- Immediately unplug the blender from the wall outlet.
- Allow the unit to sit and cool down completely for at least 15-20 minutes.
- Carefully remove the pitcher from the motor base, then disassemble it by taking off the lid and unscrewing the blade assembly.
- Empty the contents and visually inspect the blade area and the bottom of the pitcher for any food jams, large pieces, or seeds that could be locking the blades.
- Reassemble the pitcher securely, ensuring the blade assembly is tightened properly. Do not exceed the "Max Liquid" fill line on the pitcher.
- Plug the unit back in. The "Er" code should be cleared. Try running the blender on a low speed with a smaller, less viscous load to test.
If That Didn't Work
If the error persists after a confirmed proper reassembly and a modest load, the issue may be internal. First, ensure you are using the correct pitcher for your specific UltraCrush model, as an incompatible container can cause sensor errors. If the problem continues, there may be a fault with the thermal protector or the main control board, which will require professional service from Ninja Customer Support.
Heads Up
Never attempt to force ingredients through the lid while the blender is running, and always use the tamper tool provided with your UltraCrush model specifically for pushing down ingredients, and only when using the "Pulse" or designated "Dough" functions. Running the motor with jammed blades can cause permanent damage.