ResMed CPAP Not Working: Diagnosis and Fixes for AirSense 10 and 11

Quick Answer

When a ResMed AirSense 10 or 11 is described as not working, the actual failure falls into one of five categories: no power (dead device), power but no airflow (motor fault), airflow but wrong pressure (settings or AutoSet issue), therapy running but AHI not improving (mask leak or pressure too low), or display/data not functioning (screen or connectivity fault). The troubleshooting approach starts by narrowing which category applies. No power is usually a failed power supply brick. Power but no airflow suggests Error 12 motor failure. Airflow but ineffective therapy is typically a mask leak or settings issue. Each category has a distinct fix path.

ResmedCpapSeverity: high70% DIY Success

Time to Fix

5–30 min

Difficulty

beginner

Parts Cost

$0 – $0

Tools Needed

Phone charger or lamp (to test outlet), Soft dry cloth

What Does the NOT-WORKING Code Mean?

Identify what specifically is not working: no power, no airflow, wrong pressure, ineffective therapy, or display problems. Each has a different fix path starting with the power supply.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Power supply failure40%

Motor fault (Error 12 or similar)24%

Mask leak preventing effective therapy14%

Humidifier not heating (perceived as not working)12%

Settings misconfigured after accidental change10%

Symptoms You May Notice

Device completely dead - no power or lights
Device powers on but produces no airflow
Airflow present but therapy feels ineffective
Error code displayed on screen
AHI score increasing despite regular use
Screen blank but device seems to run

Can you reset a Resmed cpap to clear the NOT-WORKING code?

AirSense 10: Settings > Device > Reset Device. AirSense 11: My Device > Factory Reset. For a completely unresponsive device, unplug the power cord from the device for 60 seconds and reconnect. Clinical settings require provider access code.

Tools Required for Diagnosis

Phone charger or lamp (to test outlet)Soft dry cloth

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Check power

Check power. Does the screen light up when you press Start/Stop? If completely dead, check the wall outlet, power cord connections at both ends, and the green LED on the power supply brick. If no power, the power supply likely needs replacement.

Check airflow

Check therapy effectiveness

If the device has power

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
ResMed AirSense 10 Power Supply UnitN/A · $0–$0	N/A	$0 – $0
ResMed AirSense 10 Fine Filter KitN/A · $0–$0	N/A	$0 – $0
ResMed mask cushion (model-specific)N/A · $0–$0	N/A	$0 – $0

Verify part fitment for your Resmed model

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs

Labor Approach

Our Verdict

REPLACE

Estimated Cost: $0 (Parts) vs $800 (New Machine)

Frequently Asked Questions

My CPAP turns on but does not seem to do anything - is it broken?

If the screen lights up but you feel no airflow, check for an error code on the display. If there is no error and the device appears normal, press Start and check for air at the tubing outlet. On AutoSet models, the device starts at low pressure (often 4 cmH2O) which can feel like almost nothing - this is normal, especially with the Ramp feature enabled.

How do I know if my CPAP is actually treating my sleep apnea?

Check the myAir app or device screen for your AHI (Apnea-Hypopnea Index) score. A well-treated patient typically has an AHI below 5. If your AHI is consistently above 5 despite nightly use, your pressure settings may need adjustment or your mask may be leaking. Discuss with your sleep specialist.

Should I go to the ER if my CPAP stops working?

Missing one or a few nights of CPAP is generally not a medical emergency for most patients. However, if you have severe sleep apnea (AHI above 30) or serious cardiac conditions, contact your sleep doctor and DME provider urgently for a loaner device. Sleep on your side to reduce apnea severity while waiting for a replacement.

Related Resmed Cpap Error Codes

Code: HUBResMed CPAP Error Codes: Complete AirSense 10 and 11 Fault Guide Code: WONT-TURN-ONResMed CPAP Won't Turn On: Causes and Fixes Code: TROUBLESHOOTResMed CPAP Troubleshooting Guide Code: KEEPS-OFFResMed CPAP Keeps Shutting Off

Models Known to Experience NOT-WORKING Errors

This repair applies to most Resmed cpaps with this error code. Common model numbers include:

AirSense 10 AutoSet, AirSense 10 CPAP, AirSense 10 Elite, AirSense 10 For Her, AirSense 11 AutoSet, AirCurve 10 VAuto, AirCurve 10 ST

Last verified for technical accuracy on March 15, 2026