CPAP Error Codes & Troubleshooting

Find the exact error code or message displayed on your CPAP machine and see its manufacturer-documented meaning, safe checks, affected models, and when the machine needs professional service.

130 published faults · 124 codes · 6 display messages

Search CPAP errors/messages

CPAP brands

  • Philips

    codes · 88 documented faults

  • ResMed

    36 codes · 6 display messages · 42 documented faults

Popular ResMed errors and messages

  • ResMed Motor Life Exceeded — The available AirSense 10 service reference describes Motor Life Exceeded as a motor-hours warning and reports 21,900 hours for th
  • ResMed High Leak Detected — High Leak Detected means the device is sensing more unintended air loss than expected. The manufacturer guidance points to mask fi
  • ResMed Error 004 — For AirSense 10, ResMed's official user guide lists a hot environment, a blocked air filter, or water in the air tubing as possibl
  • ResMed Error 4 — For AirSense 11, ResMed's official user guide links Error 4 to a hot environment, a blocked air filter, or water in the air tubing
  • ResMed Tubing Blocked — The device is detecting or reporting restricted airflow through the external air tubing. ResMed's user guidance directs the user t
  • ResMed Humidifier Fault — Humidifier Fault identifies a problem in the humidifier system, but the user consequence depends on the device family. The AirSens

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Safe checks with an external tool or supply

These pages list the check you can do from outside the unit, with an optional external tool or maintenance supply. None of them repair an internal fault.

  • E-35 — E-35 is DreamStation error ERR_MOTOR_BLOCKED_INLET, a CONTINUE-level error (the device continues operation but… external check: DreamStation 1-compatible disposable filters
  • Error 004 — On AirSense 10, the official user guide associates Error 004 with a hot environment, a blocked air filter, or … external check: AirSense 10-compatible external air filters
  • Error 4 — On AirSense 11, ResMed's official user guide says Error 4 can follow a hot environment, a blocked air filter, … external check: AirSense 11-compatible external air filters
  • High Temperature Fault — For the cited S9 device family, High temperature fault indicates a temperature condition that requires the dev… external check: ResMed S9 external air filters

CPAP troubleshooting guides

How our information is verified

Published references keep a verification date, source links, model context where known, a safety classification, and a clear boundary between user checks and service work. Manufacturer documentation is shown before secondary context.

Manufacturer manual links