← Full guide: Dyson V10 Blue Lights: Decode the Pattern Before Service
Dyson V10 has one flashing blue light and will not run
One flashing blue battery light means the V10 needs charging.
Start here
One flashing blue battery light means the V10 needs charging. Charge it fully first; if it still immediately returns to low-charge behavior, diagnose charger/battery health.
Check these first
- Use correct charger/outlet.
- Observe charging lights.
- Allow the full normal charge period.
Fix it in this order
- Charge fully.
- Retest runtime.
- If it will not charge, isolate outlet/charger/battery through Dyson support.
Evidence to keep
- Charging light behavior
- Runtime after full charge
Do not make it harder
- Battery replacement before checking charger/outlet
How you know it is fixed
- Battery charges and provides normal runtime for the selected mode.
If the obvious fix does not work
- If charge completes but runtime is abnormally short, battery degradation may be the issue.
- If no charging lights appear, check charger/power before replacing battery.
If this still isn't resolved
- Dyson Support
Sources for this path
Use these references to confirm provider-, model-, policy-, or jurisdiction-specific details before an irreversible step.
Need the complete context?
This page solves one branch. The parent guide covers the full decision, edge cases, alternatives, and related checks.