ResMed Heated Tube Fault: What It Means & What to Do
Quick answer
ResMed user documentation uses Heated tube fault, replace tube for a fault in the ClimateLine or ClimateLineMAX heated tubing on supported systems. Stop therapy, inspect the external tube and connections, use standard tubing only if the model guide permits it, and contact the provider if the message returns.
Equipment: CPAP · Fault type: display message · Severity: high
What Heated Tube Fault means
ResMed Heated Tube Fault is documented as a CPAP device fault. The available service documentation contains additional internal diagnostic detail, which is separated below because it is not a consumer repair procedure.
What to check
Stop therapy and inspect the heated tube for visible damage and secure connections. Do not open the device or attempt to repair the heater wire inside the tube.
Standard tubing
Use another tubing type only when the user guide for your device explicitly permits it. Do not assume a different tube preserves every feature or setting.
What you can safely check
- Stop therapy and read the complete displayed message before doing anything else.
- Disconnect power using the device power connector or power supply; do not open the enclosure.
- If overheating is implicated, move the device away from heat and allow it to cool before reuse.
- Inspect the external air filter for blockage and replace it only as the user guide directs.
- Inspect the air tubing for blockage, kinks, damage, or water.
- Where relevant, verify that the humidifier tub or side cover is seated correctly and dry.
- Reconnect power and perform ONE restart only when the manufacturer's user guide allows it for that message.
- If the fault returns, therapy is unavailable, or the message is unrecoverable, contact your CPAP equipment provider or authorized service center. Follow your care provider's guidance if therapy cannot be used.
What not to do
- Do not open the enclosure or replace internal electronics, blower hardware, sensors, or boards yourself.
- Do not perform calibration, enter undocumented service menus, bypass safety mechanisms, or change therapy-pressure settings to work around the fault.
Technician-level interpretation
Service documentation may describe internal diagnosis or component replacement. These are not consumer procedures.
- Service-record meaning: The display message indicates a fault associated with the supported heated air tubing rather than a universal internal-device diagnosis. The cited ResMed information guide directs replacement of the affected user-accessible tube and separates that accessory fault from internal service work.
Which models are covered?
- S9 with ClimateLine or ClimateLineMAX heated tubing
If the message returns
Contact your CPAP equipment provider or authorized service center. If therapy is unavailable, follow the guidance from your care provider rather than improvising a replacement setting.
Related ResMed CPAP faults
Sources
- ResMed S9 Series H5i and air tubing information guide — official — manufacturer-support; verified 2026-09-03
- ResMed ClimateLine fault support article — manufacturer-support; verified 2026-09-03
Related CPAP guides
CPAP High Leak: What to Check · CPAP Machine Error: Safe Checks Before Calling Your Provider