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ECOVACS·FAULT ERR 10503 INFO

ECOVACS Error 10503 — Wi-Fi password never reached the robot

Severity: Info — setup aborted mid-handover — nothing is wrong with the robot itself ECOVACS HOMEDEEBOT Wi-Fi setup
Last verified: 2026-07-07 Tools: phone with the ECOVACS HOME app Time: ~15 min Difficulty: easy

DIRECT ANSWER

Error 10503 means the network setup information never reached DEEBOT — the phone left the "ECOVACS_xxxx" network while handing over your Wi-Fi name and password. Stay on that network until the progress bar passes 50%.
#meaning · #causes · #fix — link straight to any section

COMMON CAUSES · RANKED

1

Phone dropped the robot's network too early MOST COMMON

ECOVACS' official instruction is to keep the phone on "ECOVACS_xxxx" until setup progress reaches 50% — leaving earlier cuts the password handover.

2

Samsung auto-switch features

ECOVACS names "Switch to mobile data" (S8/S9/S10/A8/A10 era) and "Auto network switch" — both yank the phone to 3G/4G because the robot's hotspot has no internet.

3

Cellular data left on

With data on, any phone may prefer a working 4G/5G route over the internet-less robot hotspot mid-transfer.

HOW TO FIX IT

No battery or electrical work involved in this fix.

Turn cellular data off

Disable mobile data entirely for the duration of the setup.

Disable auto network switching

On Samsung, turn off "Switch to mobile data" / "Auto network switch" in Settings → Connections → Wi-Fi before pairing.

Stay on ECOVACS_xxxx past 50%

Join the robot's network when prompted and don't touch the phone's Wi-Fi until the app's progress bar is beyond half.

Retry and escalate

Run setup again from the start; if 10503 repeats on a non-Samsung phone, try a second phone before contacting ECOVACS support.

Sources

Verification

OFFICIAL SOURCE

Last verified: 2026-07-07 · How we verify a fault code

Corrections

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