ResMed CPAP Error Codes & Messages
Search ResMed AirSense 10, AirSense 11, and supported AirCurve references by numbered error, display message, model, symptom, or fault family. The numbered code can differ by product generation, so read the model-specific source context.
Find your ResMed error
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 21,9
- ResMed High Leak Detected — High Leak Detected means the device is sensing more unintended air loss than expected. The manufacturer guidance po
- ResMed Error 004 — For AirSense 10, ResMed's official user guide lists a hot environment, a blocked air filter, or water in the air tu
- 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
- ResMed Tubing Blocked — The device is detecting or reporting restricted airflow through the external air tubing. ResMed's user guidance dir
- ResMed Humidifier Fault — Humidifier Fault identifies a problem in the humidifier system, but the user consequence depends on the device fami
Browse by model
- AirSense 10 — 19 verified faults
- AirSense 11 — 22 verified faults
Browse by fault family
Browse numbered errors
- ResMed Error 001
This is a hardware issue, caused by either a faulty blower motor or pressure sensor on the main PC board. A part will need to be replaced and unit calibrated to… - ResMed Error 002
This is a pressure sensor fault. It is possible that the CPAP needs to be recalibrated. If that doesn't solve the problem, then you will need a new main PC boar… - ResMed Error 003
This is a pressure sensor fault. It is possible that the CPAP needs to be recalibrated. If that doesn't solve the problem, then you will need a new main PC boar… - 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 possible causes of Error 004. An auth… - ResMed Error 005
The voltage going to the blower motor is high. It could be caused by the power supply, blower motor, or main PC board. This will need to come in for a free eval… - ResMed Error 006
This refers to a motor stall issue with the software. You will need either the blower motor or main PC board replaced… - ResMed Error 007
is a blower motor fault. This will need the blower motor replaced… - ResMed Error 008
Another blower motor related error. This will need the blower motor replaced… - ResMed Error 009
This is related to the main PC board, which will need to be replaced… - ResMed Error 010
The flow sensor is stuck. The flow sensor is attached to the main PC board, requiring the whole board to be replaced… - ResMed Error 011
The flow sensor is stuck. The flow sensor is attached to the main PC board, requiring the whole board to be replaced… - ResMed Error 012
The flow sensor is not relaying information to the board. The flow sensor is attached to the main PC board, requiring the whole board to be replaced… - ResMed Error 013
The pressure sensor is not reading properly. This can be caused by the device being out of calibration, the sensor becoming dislodged from its seal, or being fa… - ResMed Error 017
This is a software data issue. The main PC board will need to be replaced… - ResMed Error 018
This is a calibration data error. This is caused by the device being out of calibration. If calibration doesn't correct this problem, then the main PC board wil… - ResMed Error 019
This error code is not very helpful. It is a non-specified error that will need either the blower motor or main PC board replaced… - ResMed Error 020
The flow sensor is faulty. This requires the main PC board to be replaced. Repair Altra Service provides fast and affordable repair and maintenance for all of t… - ResMed Error 1
Motor has stalled (hardware and MT4 Over Temperature); faulty motor - replace motor… - ResMed Error 10
Flow sensor stuck low; faulty main PCB - replace main PCB… - ResMed Error 11
Flow sensor stuck high; faulty main PCB - replace main PCB… - ResMed Error 12
No flow data; faulty main PCB - replace main PCB… - ResMed Error 13
Pressure sensor drift 5cm; pressure sensor issue - complete device testing in RSC, replace main PCB… - ResMed Error 14
Pressure sensor stuck high; pressure sensor issue - complete device testing in RSC, replace main PCB… - ResMed Error 15
Pressure sensor stuck low; pressure sensor issue - complete device testing in RSC, replace main PCB… - ResMed Error 17
Settings reset; flash corruption or file system error - power cycle device, send device logs to ResMed for analysis… - ResMed Error 18
Calibration reset; data corruption - power cycle device, test device and recalibrate, send device logs to ResMed for analysis… - ResMed Error 21
Mixed signal chip error; faulty main PCB - replace main PCB… - ResMed Error 23
Implausible supply voltage; pressure sensor issue - replace main PCB… - ResMed Error 24
Faulty HW fault detection circuitry; faulty main PCB - replace main PCB… - ResMed Error 3
Mask over pressure (severe) / Motor fast over pressure; pressure sensor fault or software issue - complete pressure test, replace main PCB… - 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. The associated service guide… - ResMed Error 5
Motor over-voltage; faulty power supply, faulty motor or faulty main PCB - replace faulty part… - ResMed Error 6
Motor stall (software, back EMF check); faulty motor or faulty main PCB - replace faulty part… - ResMed Error 7
Motor hardware out of bounds; faulty motor - replace motor… - ResMed Error 8
Motor sticky; faulty motor - replace motor… - ResMed Error 9
Motor H bridge failure; faulty main PCB - replace main PCB…
Browse display messages
- ResMed Heated Tube Fault
The display message indicates a fault associated with the supported heated air tubing rather than a universal internal-device diagnosis. The cited ResMed inform… - ResMed High Leak Detected
High Leak Detected means the device is sensing more unintended air loss than expected. The manufacturer guidance points to mask fit, tubing connections, and—on … - ResMed High Temperature Fault
For the cited S9 device family, High temperature fault indicates a temperature condition that requires the device to cool before reuse. The exact message and mo… - ResMed Humidifier Fault
Humidifier Fault identifies a problem in the humidifier system, but the user consequence depends on the device family. The AirSense 11 guide says therapy can ru… - 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 that model. The ResMed user guid… - ResMed Tubing Blocked
The device is detecting or reporting restricted airflow through the external air tubing. ResMed's user guidance directs the user to check the tubing and remove …
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.
- Error 004 — On AirSense 10, the official user guide associates Error 004 with a hot environment, a blocked air filter, or …
- Error 4 — On AirSense 11, ResMed's official user guide says Error 4 can follow a hot environment, a blocked air filter, …
- High Temperature Fault — For the cited S9 device family, High temperature fault indicates a temperature condition that requires the dev…
Model-matched external accessories
These are external user-replaceable supplies, not internal repairs. Check your exact device model before ordering.
- AirSense 10-compatible external air filters — External user-replaceable air filters only. Confirm AirSense 10 compatibility; this does not repair an internal device fault. View on Amazon →
- AirSense 11-compatible external air filters — External user-replaceable air filters only. Confirm AirSense 11 compatibility; this does not repair an internal device fault. View on Amazon →
Related CPAP guides
Manufacturer manuals
- ResMed AirSense 10 device with humidifier - User Guide (Americas, official): Error 004 = hot environment/blocked filter/water in tubing - cool, replace filter, power-cycle; all other Error 0XX = unrecoverable device fault, contact care provider, do not open
- ResMed AirSense 11 Series Service and Technical Guide (doc 398011/2), Troubleshooting guide - numbered error messages
- ResMed AirSense 11 User Guide (Americas, official): Error 4 = hot environment/blocked filter/water in tubing - cool, replace filter, power-cycle; all other numbered Errors = unrecoverable device fault, contact care provider, do not open
- ResMed S9 Series H5i and air tubing information guide — official
- ResMed ClimateLine fault support article
- ResMed AirCurve 11 — official user guide
- ResMed Air Solutions Troubleshooting Guide — official
- ResMed S9 AutoSet and S9 Elite — official user guide