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Blue LEDs flash

Blue LEDs flashing on battery — Machine is charging

Dyson · Gen5Detect Vacuum

What does Blue LEDs flash mean?

When the Dyson machine is connected to its charger, the blue LEDs located on both sides of the battery unit will flash. This visual cue indicates that the battery is actively receiving a charge.

Common Causes

  • Machine is connected to the charger.
  • Battery is not yet 100% full and requires power.
  • Normal indication during the charging process.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the charger is securely connected to both the machine and a working power outlet.

  2. 2

    Allow the machine to continue charging until the blue LEDs stop flashing and light solid for five seconds.

  3. 3

    Check the LCD display for the percentage charge to confirm progress.

  4. 4

    Do not interrupt the charging cycle unless necessary.

Browse all codes in this manual (9)
Verified technical data. Last updated: April 2026

Related Faults

3 pulses, Low run time (amber)Machine pulses 3 times and 'Low run time' (amber) on screen — Battery needs chargingBlue LEDs solid for 5s, 100% on displayBlue LEDs solid for 5 seconds and 100% on display — Battery fully chargedClean filterClean filter on screen — Filter needs cleaning
Source: Dyson Gen5Detect Vacuum
Open Manual (Page 8)Search more codes in this manual