Eureka Main Brush Drive Failure Without Error Detection

Robot vacuum’s main brush does not spin, but suction works and no code is shown.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Main brush belt (if used) broken or slipped, Brush motor connector loose, Gearbox stripped, Firmware not detecting stall

Safety first: Turn off the robot and remove it from the dock.

Check brush movement: Remove the main brush and ensure it spins freely by hand.
Inspect drive: With the brush removed, briefly start the robot and look into the brush cavity to see if the drive spindle turns (keep fingers clear).
If spindle does not turn: The Main Brush Motor Assembly or belt/gearbox is likely damaged and needs replacement.
Reseat connectors (advanced): Open the bottom cover and ensure the motor harness is firmly connected to the main PCB.

Medium 3/5

Main Brush Motor Assembly

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