High leak (tub or side cover) High leak detected. Check your humidifier or side cover.
What it means: The tub or side cover is not seated properly.
What to do: Reinsert the tub or side cover until it is correctly in place.
ResMed AirCurve 11 VAuto
Find the message on your screen below. Most alerts clear with a simple check: the water chamber seated, the tube connected, the filter clean. If a code keeps coming back after the fix, stop using the machine and contact your equipment supplier or the manufacturer.
What it means: The tub or side cover is not seated properly.
What to do: Reinsert the tub or side cover until it is correctly in place.
What it means: The tubing is loose, or the mask is not fitted correctly.
What to do: Connect the tubing firmly at both ends and refit the mask or run Mask Fit.
What it means: Airflow through the tubing is blocked.
What to do: Clear the blockage and press the Start Therapy/Standby button to restart.
What it means: The card's lock switch is set to read-only.
What to do: Slide the switch to unlock and reinsert the card.
What it means: Possible causes: the machine was left somewhere hot, the air filter is blocked, or there is water in the tubing.
What to do: Let it cool, replace a blocked filter or empty the tubing, then disconnect and reconnect the AC adaptor.
What it means: An error has occurred on the device.
What to do: Remove power and restart. If the error persists, contact your care professional. Do not open the device.
What it means: A humidifier fault was detected; therapy runs without heating.
What to do: Reseat the tub and restart. If the icon remains, contact your care provider.
What it means: The side cover is connected and the device is cooling.
What to do: No action needed; let it finish.
No matching code. Check the exact text on the screen, or see the troubleshooting section on the machine page.
Last reviewed October 11, 2026. How we research · Report an error