The standard Hue Bridge (V2) connects to your router by Ethernet, so its network health is about the cable, the port and the router, while the Bridge Pro can also connect over wifi, according to reports read: it has built-in wifi so it does not need to sit next to the router. Hue's Bridge Pro setup article covers connecting it. For the standard Bridge, use a short good Ethernet cable and try another router port; the middle Bridge light should come on when the network link is up.
The checks in more detail
Restart the router and modem, since a router that assigns a changing address can make the app lose the Bridge, and the app can find the Bridge by its IP address if you give it. For lights that show offline while the Bridge is online, the problem is the Zigbee radio, not wifi, since lights talk to the Bridge over Zigbee: move the Bridge to a central open spot, keep it away from metal and other 2.4 GHz devices and away from the router's own antennas, or change the Zigbee channel in the app.
Check that the router isn't blocking the Bridge with a firewall or filter, and that only one DHCP server runs on the network, since a second router can cause address clashes. If you switched routers, restart the Bridge. On the Bridge Pro, choose wifi only if Ethernet is impractical, since wired is steadier. Keep the Bridge software up to date. Test the Bridge in a central spot with a short Ethernet cable before you move it further, and note whether lights across the house respond better.
Keep the Bridge away from the router's antennas and away from metal shelves, since both weaken the Zigbee signal to lights. After a router change, restart the Bridge the same day. Compare two spots for the Bridge by asking a person to toggle a far light while you watch the response time, since a measured difference is more useful than a guess. A Zigbee channel change in the app moves every light to a new radio channel, so do it during a quiet time and give lights a few minutes to follow before you judge whether it helped.
Differential
Likely causes of “Philips Hue Bridges will not stay connected to Wi-Fi”, and how to tell them apart
- 1
A bad Ethernet cable or port
What separates it The middle light is off because the Ethernet cable or the router port the Bridge uses has failed
How to confirm Swap the cable and use a different port on the router, then check the middle light comes on
- 2
A router change
What separates it The app loses the Bridge after the router or its settings were changed at home
How to confirm Restart the Bridge and search for it by IP address, since the router may have given it a new address
- 3
Zigbee interference
What separates it Lights go offline in the app because Zigbee interference from wifi devices disturbs the radio link
How to confirm Move the Bridge away from routers and change its Zigbee channel to reduce the interference
- 4
Two routers on the network
What separates it Devices clash on addresses because two routers are both handing out addresses on the same network
How to confirm Use a single router, or put the second one into bridge or access point mode
- 5
A firewall block
What separates it The internet light stays off because a firewall or a router security setting blocks the Bridge
How to confirm Check the router's security and firewall settings and allow the Bridge to reach the internet
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which lights on the Bridge are lit and which are off
- The Ethernet cable and the router port that the Bridge uses
- How the router and any second router are set up
- The Zigbee channel the Bridge is using
Try in this order
0 of 7 completedCheck the Ethernet link
ReversibleCheck the Ethernet link by looking at the cable, the plug and the port, because the standard Bridge depends on that cable for its network.
Restart router and modem
ReversibleRestart the router and the modem, and wait for all their lights to settle before you test the Bridge again.
Restart the Bridge
ReversibleRestart the Bridge by unplugging its power for 30 seconds, then wait for the lights to come on in turn.
Use IP search
ReversibleUse the IP search in the Hue app if the Bridge is not found, entering the address the router lists for it.
Move the Bridge
ReversibleMove the Bridge to a central, open position, away from metal, thick walls and other radio equipment.
Change Zigbee channel
ReversibleChange the Zigbee channel in the app if lights drop out, choosing a channel away from your wifi channel.
Contact Hue
ReversibleContact Hue if it still fails, and give them the Bridge model, the lights that are on and the router type.
Model-specific
What is true of this model and not of its siblings
- Bridge Pro
- Has built-in wifi and Ethernet.
- Lights
- Talk to the Bridge over Zigbee.
- Other models this page answers
- These steps also fit the Hue Bridge Pro.
Stop boundary
When this stops being a self-service repair
- !If the Bridge never links after a swap and restart, contact Philips Hue support
- !If only the lights are offline and the Bridge is fine, address the Zigbee radio problem
- !If two routers give out addresses, remove one or change it to bridge mode
Evidence ledger
Sources behind this answer
Bridge Pro setup.
Bridge lights and updates.
Reset steps for the Bridge and Bridge Pro.
The company and its products.
Exact questions
Common questions
Does the Bridge use wifi?+
The Bridge Pro can connect over wifi as well as Ethernet, but the standard V2 Bridge uses an Ethernet cable only.
Do lights use wifi?+
No, the lights do not use wifi, because they talk to the Bridge over Zigbee, and only the Bridge joins your network.
Can two routers cause problems?+
Yes, two routers on one network can cause address clashes and odd behavior, so use one router or set the second to bridge mode.
Should I use Ethernet?+
Yes, use Ethernet where you can, because a wired link is steadier than wifi and the standard Bridge needs it.
Can I change the Zigbee channel?+
You can change the Zigbee channel in the Hue app, which helps when wifi interference makes lights drop out.
How many lights does a Bridge support?+
The standard Bridge supports 50 lights and the Bridge Pro supports 150, so a big home may need the Pro.
How many accessories?+
The Bridge Pro supports 50 accessories such as dimmer switches and motion sensors, which is more than the standard Bridge allows.
What wireless protocol do Hue lights use?+
Hue lights use Zigbee to talk to the Bridge, and some also use Bluetooth or Matter for direct control.
Do I need a hub for Matter?+
A Matter controller helps, though iOS 18 can pair a Matter device without a separate hub.