Robot vacuum shows C20 and may not respond to touch buttons properly.

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

Moisture on touch panel, Damaged touch PCB, Loose ribbon cable to main PCB, Firmware miscalibration of touch sensitivity

Safety first: Disconnect the robot from the dock before cleaning the panel.

Dry the surface: Wipe the touch panel with a dry, lint‑free cloth. Ensure your hands are dry when operating.
Power cycle: Turn the robot off for 30 seconds, then back on to reset the touch controller.
Use app as workaround: If the touch panel is unreliable but the app works, you can continue using the robot via the app while arranging service.
Persistent C20: Indicates a likely failure of the touch PCB or its connection, requiring replacement.

Medium 3/5

Touch Control PCB

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