Error 1100
ResMed CPAP Machine
Severity:What Does This Error Mean?
Error 1100 means the internal pressure sensor has failed or is reading incorrectly. The machine cannot safely deliver therapy without accurate pressure sensing. This is a hardware fault requiring service or replacement.
Affected Models
- ResMed AirSense 10 AutoSet
- ResMed AirSense 10 Elite
- ResMed AirSense 11 AutoSet
- ResMed AirCurve 10 VAuto
- ResMed S9 AutoSet
Common Causes
- Pressure sensor component failure
- Internal condensation damaging sensor circuitry
- Electronic board fault
- Dropping or physical impact damaging the sensor
How to Fix It
-
Unplug and leave unpowered for 5 minutes.
Occasionally a sensor gives a false error after a power fluctuation. A full power cycle clears transient faults.
-
Ensure the machine and humidifier chamber are dry.
If you use a heated humidifier, water can condense inside the machine in cold rooms. Leave the machine unpowered with the humidifier removed for several hours.
-
If Error 1100 returns, contact ResMed support.
Quote Error 1100 and your machine's serial number. ResMed support: resmed.com/support
-
Do not use a machine showing persistent Error 1100.
Without accurate pressure sensing, the machine cannot guarantee correct therapy pressure. Using it could mean under-treatment of your sleep apnea.
Frequently Asked Questions
Will ResMed replace my machine for Error 1100?
If you are within the 2-year warranty period, yes — ResMed will repair or replace the machine. If out of warranty, they may offer a refurbished unit at reduced cost. Always contact them before buying a new machine.