What should I do if my Inogen One G5 shows a triangle alert and will not run?
Answer
A triangle alert on an Inogen One G5 can mean the unit has stopped producing oxygen correctly. Switch to your backup oxygen source first, then power the G5 down fully and contact Inogen or your equipment provider for service—do not keep relying on a unit in fault.
Before you start: stop right away if…
- If a concentrator is in fault, use backup oxygen right away; do not wait through extended troubleshooting without oxygen.
- This is general device guidance, not personal medical advice—follow your clinician’s oxygen plan.
Follow these steps
Switch to backup oxygen immediately
If the G5 is in fault, use your backup oxygen source as directed by your clinician. Treat the alert as a possible loss of oxygen production.
You should see: You are receiving oxygen from a working backup source.
Remove power completely
Turn the G5 off, remove the battery, and unplug AC power. Wait a few minutes, then reinstall power only to see whether the same triangle returns.
You should see: The alert clears briefly for diagnostics, or it returns immediately.
Record the exact alert details
Note any code, icon, light pattern, serial number, and what you already tried (battery, AC, reset).
You should see: You have clear details for support.
Contact Inogen or your equipment provider
Call the official Inogen support line or the provider who supplies your oxygen equipment to arrange service or a replacement unit.
You should see: A service or replacement path is scheduled.
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Extra tips
What to look for: The triangle or alert image, any brief error code or number with it, and whether the unit produces flow after the alert.
Before you change anything: Use your prescribed backup oxygen source before troubleshooting further. Note any code shown with the triangle. Have the G5 serial number and purchase date ready for support. Do not open the concentrator case.