Understanding Device LED Status Indicators

Ever stared at your UniFi device wondering what that blinking light is trying to tell you? Here’s a simplified breakdown of the most common LED patterns and what they mean across UniFi access points, routers, switches, and UDM base models:

🟡 Startup & Adoption

• Flashing White (every 0.5s): Device is booting up.
• Steady White: Ready to be adopted into your UniFi Network.
• Flashing White–Blue–Off: TFTP recovery mode (used for firmware recovery).

🔵 Normal Operation

• Steady Blue: Device is adopted and working normally. WiFi is active.
• Rapid Flashing Blue: “Locate” feature is active—helps you find the device physically.

🔴 Issues & Troubleshooting

• Blue + Flashing Off (every 5s): No internet connection.
• Strobing White/Off: Try power cycling. If it persists, contact support.
• LED Off: Device is offline. Check power, PoE, and Ethernet connections.

🟣 Firmware & Updates

• Quick Flashing White/Blue: Firmware is updating—don’t unplug!

🌐 UniFi Bridge (UBB) Specific

• Red with Circulating Blue: 60GHz link dropped (often due to weather).
• Green: Devices are aligned properly (when using the Alignment Tool).

📶 UniFi Mobile Routers (UMR)

• Blinking Blue (3s on, 0.2s off): Network or WiFi error.
• Blinking White (3s on, 0.2s off): SIM card issue (locked or not detected).

Understanding these patterns can save you a lot of guesswork and downtime. For the full official guide, check out Ubiquiti’s LED Status article.