Inlet blocked Inlet blocked. Check filter.
What it means: Something is blocking the device air inlet.
What to do: Clear the inlet, make sure the filters are installed properly, and replace them if needed.
Philips DreamStation (CPAP, CPAP Pro, Auto CPAP)
Philips DreamStation (CPAP, CPAP Pro, Auto CPAP) 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.
Low Leak Low Leak: Check Mask and Tube
What it means: Airflow is restricted at the tube or mask.
What to do: Make sure the tube is not crushed or folded and the mask is attached without obstruction.
Humidification Error Humidification Error. Contact support if the problem persists.
What it means: Heater plate error or the humidifier is not connected properly.
What to do: Turn off and unplug, detach the humidifier, check the electrical contacts, reconnect it and the power cord. Contact your provider if it continues.
Heated Tube Error Heated Tube Error. Contact support if the problem persists.
What it means: The heated tube may be overheated or damaged.
What to do: Turn off the device, detach the heated tube, make sure it is not covered or blocked, and reattach it. Contact your provider if it continues.
Power supply does not support humidification The attached power supply does not support humidification.
What it means: The power supply cannot run the humidifier or heated tube.
What to do: Switch to a Philips DreamStation power supply that supports humidification, or run without the humidifier.
Service Required Service Required
What it means: The device is in Safe State: power on but airflow disabled.
What to do: Press the dial to silence it, unplug and replug the power cord. If it continues, contact your home care provider.
Check Power Check Power
What it means: Incompatible power supply or the cord is not fully inserted.
What to do: Push the cord fully into the power inlet and confirm you have a compatible Philips power supply.
Low Voltage Low Voltage
What it means: Low voltage from the power source.
What to do: Use a compatible Philips power supply. If on a battery, make sure it is charged.
SD Card Error SD Card Error: Remove and Reinsert
What it means: The machine cannot read the SD card.
What to do: Remove and reinsert it. If it continues, use another card or contact your provider.
SD Card Full SD Card Full.
What it means: The card is full.
What to do: Replace it with a new card or ask your provider for one.
Change Rejected Change Rejected
What it means: A prescription or settings change was missing or incorrect.
What to do: Contact your provider.
No matching code. Check the exact text on the screen, or see the troubleshooting section on the machine page.
Sources
Last reviewed October 11, 2026. How we research · Report an error