E9
Eufy Gyroscope / IMU Calibration Failure

Robot vacuum reports E9 and may not move correctly; often associated with gyro or navigation error on some Eufy models.

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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

Robot started on uneven or sloped surface, Internal gyro sensor fault, Loose gyro connector on main PCB, Firmware corruption affecting navigation module

How to Fix / Troubleshooting

Safety first: Turn the robot OFF and place it on a level, hard surface away from magnetic interference (large speakers, metal plates).

Step-by-step:

  • Reboot and recalibrate: Power ON the robot while it is on a flat surface. Some models auto-calibrate the gyro at startup. Avoid moving the robot for 1–2 minutes after power-on.
  • Factory reset: Use the app or button combination specified in your Eufy manual to perform a factory reset. This can clear navigation-related software faults.
  • Check for impacts: If the robot has been dropped or heavily impacted, internal gyro components may be damaged.
  • Advanced inspection: Open the top cover to access the main control board. The gyro/IMU is typically a small chip on the PCB; ensure the board is firmly mounted and that no connectors are loose. If the board is cracked or components are missing, replace the main PCB.

When to stop: If E9 persists after resets and the robot behaves erratically, main board replacement or professional service is recommended.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board (with Gyro/IMU)
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