semiatic

“Tubing blocked” and blocked-airway messages on a CPAP machine

The opposite of a leak: air cannot get through. The makers name a folded or squashed tube, something over the air inlet, or a blocked filter.

Therapy settings: This page explains what a CPAP machine’s screen or light is telling you, in the maker’s words. It is not medical advice: ask your equipment provider or clinician about your therapy settings, and do not change your pressure or any prescribed setting because of anything here.

ResMed

  1. ResMed AirSense 10 Words on the screen

    Tubing blocked, check your tubing

    The air tubing may be blocked.

    What ResMed says to do

    1. Check the air tubing and remove any blockage.
    2. Press the dial to clear the message, then press Start/Stop to restart.

    Source: AirSense 10 user guide (AirSense 10 AutoSet, AutoSet for Her, Elite and CPAP, with HumidAir) (ResMed, 378947/1, 2021-02), checked 2026-09-29.

Everything else ResMed’s machines show: ResMed CPAP icons and messages.

Philips Respironics

  1. Philips Respironics DreamStation 2 Words on the screen

    Blocked inlet

    Blocked airway: something is blocking the air inlet on the machine.

    What Philips Respironics says to do

    1. Check the air inlet is not obstructed.
    2. Check the air filter(s) are installed properly; replace them if needed.

    Source: DreamStation 2 Auto CPAP / CPAP user manual (Philips Respironics, 1143534 R02, 06/11/2021), checked 2026-09-29.

  2. Philips Respironics DreamStation 2 Words on the screen

    Low leak

    Blocked airway: a blockage at the tube or the mask.

    What Philips Respironics says to do

    1. Check the tube is not crushed or folded so that air flow is restricted.
    2. Check the mask is attached properly and nothing is obstructing it.

    Source: DreamStation 2 Auto CPAP / CPAP user manual (Philips Respironics, 1143534 R02, 06/11/2021), checked 2026-09-29.

Everything else Philips Respironics’s machines show: Philips Respironics CPAP icons and messages.

React Health

  1. React Health Luna G3 Something the machine does

    Air from the machine is unusually hot

    The air inlet may be partly blocked, so too little air is getting into the machine.

    What React Health says to do

    1. Replace the air filter (or the optional ultra-fine filter) and clean the air inlet.
    2. Put the machine where air flows freely, at least 20 cm from walls, curtains and other objects.

    Source: Luna G3 APAP / Luna G3 CPAP User Manual (React Health, V1.7, issue date February 29, 2024), checked 2026-09-29.

Everything else React Health’s machines show: React Health CPAP icons and messages.

Other things a CPAP machine shows

Sources

Each maker’s own user guide only, read on the date shown. Nothing here comes from third-party CPAP forums or “error code” sites.

Find any icon, message or light on your machine →