E4
Coredy Main Brush Overload / Motor Overcurrent

Robot vacuum shows E4 and stops, often after running for a short time; may feel hot to the touch.

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Safety Warning

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.

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Possible Causes

Main roller brush tangled with hair or string, Brush bearings seized, Main brush motor overloaded or failing

How to Fix / Troubleshooting

Safety first: Turn OFF the robot and remove it from the dock. Allow it to cool for 10–15 minutes if it feels warm.

  • Remove main brush: Flip the robot over, open the main brush guard latch, and lift out the main roller brush.
  • Clean brush thoroughly: Use the included cleaning tool or scissors to cut away hair, threads, and pet fur from the bristles and ends. Remove the end caps (if removable) and clear hair from the bearing areas.
  • Clean brush housing: Vacuum or wipe out the brush chamber, especially near the drive gear side where debris can jam the mechanism.
  • Inspect brush motor: Spin the brush motor gear (if visible) gently with your finger. It should turn smoothly without grinding noises.
  • Reinstall and test: Refit the brush, close the guard securely, power ON, and start a cleaning cycle. Avoid thick rugs or long‑pile carpets during testing.

If E4 recurs quickly with a clean brush, the main brush motor or its driver circuit may be failing and require replacement.

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Repair Difficulty

Medium 3/5

Required Part

Main Brush Motor Assembly
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