ResMed AirCurve 11 VAuto

ResMed AirCurve 11 VAuto error codes and alerts

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.

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.

High leak (tubing) High leak detected. Connect your tubing.

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.

Tubing blocked Tubing blocked. Check your tubing.

What it means: Airflow through the tubing is blocked.

What to do: Clear the blockage and press the Start Therapy/Standby button to restart.

SD card read only Read only card, remove, unlock and re-insert SD card

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.

Error 4 System fault, refer to user guide, Error 4

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.

Error X (other numbers) System fault, refer to user guide, Error X

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.

Humidifier fault icon Humidifier fault icon on the status bar

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.

Device cooling icon Device cooling icon on the status bar

What it means: The side cover is connected and the device is cooling.

What to do: No action needed; let it finish.

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Sources

Last reviewed October 11, 2026. How we research · Report an error