What does error code E3 mean on the Lionelo Thermup Go bottle warmer and how can it be resolved?

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The error code E3 is not documented in the official manual of the Lionelo Thermup Go bottle warmer. However, it is likely a variant or extension of the listed error codes (E0, E1, E2), all of which indicate a problem requiring intervention from customer service.

First step - Restart: Start by completely turning off the device, unplugging it from the USB power source, and waiting at least 2 to 3 minutes. Plug it back in and turn it on. This procedure often resolves temporary issues. As with error code H1, this restart may be sufficient to clear the error.

If the error persists: Check that the bottle is correctly positioned in the warming cradle, that the temperature sensor is not dirty or wet, and that the USB-C cable is properly connected without visible damage. Also, ensure that the bottle is not overfilled and that the wrist Velcro is securely closed.

Contact support: If the E3 code reappears after the restart, it indicates a malfunction of the temperature sensor or other electronic components. You must contact Lionelo customer service or take the device to an authorized repair center. According to the manual, the device should never be opened or repaired by yourself, as only an authorized service center can perform repairs.

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