Alexa Device Not Responding / Showing Offline
When Alexa reports 'device is not responding' or a device shows offline, the Echo isn't the problem — the smart device has lost its connection to your network, or Alexa lost the link to it. Most fixes boil down to the network band, a stale skill link, or a device that needs a power cycle.
Common Causes
- The smart device only supports 2.4GHz WiFi but was connected to a band-steered or 5GHz-only network
- The device's Alexa skill is unlinked, or the device was removed from the device list
- The Echo and the smart device are on different WiFi networks or different subnets (e.g. guest network)
- A hub or bridge (Hue Bridge, SmartThings, etc.) went offline, taking every device on it with it
- The router DHCP table ran out or reassigned addresses, and the device never reconnected
- The device itself dropped offline due to a power interruption or firmware update
Step-by-Step Fix
- 1
Confirm the device is actually online in its own app first
Open the manufacturer's app (Philips Hue, TP-Link Kasa, etc.). If the device shows offline there too, the problem is the device's WiFi connection, not Alexa. If it shows online there but not in Alexa, skip to the skill steps below.
- 2
Re-link or refresh the Alexa skill
In the Alexa app, go to More > Skills & Games, find the brand's skill, and select 'Disable Skill' then re-enable and re-link your account. Then say 'Alexa, discover devices.' This is the fix for devices that are online but 'not responding' in Alexa.
- 3
Put the device on the same 2.4GHz network as your Echo
Many budget smart plugs, bulbs, and sensors are 2.4GHz-only and get stranded on a band-steered network. In your router, split the bands into separate SSIDs (or create an IoT network) and reconnect the device to the 2.4GHz-only name, then rediscover it in Alexa.
- 4
Power-cycle the device, its hub, and your router in order
Turn off the smart device and its bridge/hub, unplug your router for 30 seconds, plug it back in, wait for it to fully come up, then power the devices back on. This clears stale DHCP and mDNS entries that cause "offline" ghosts.
- 5
Check that the Echo and device aren't split across subnets
If you use a guest network, VLANs, or multiple routers, a device on a different subnet can't be discovered. Move the smart device and the Echo onto the same main network.
- 6
Remove and re-add the device from the Alexa app
As a last resort, delete the device in Alexa (More > Devices > select device > trash icon), then 'Discover devices' again. This rebuilds the skill-to-device link cleanly.
Still stuck?
If none of these steps fixed it, describe your exact situation to our AI troubleshooting assistant for a more specific answer.
Ask the AI AssistantFrequently Asked Questions
Why does Alexa say 'device is not responding'?
Alexa can reach the skill, but the skill can't reach the physical device — usually because the device dropped off your WiFi, its hub is offline, or the link between the skill and your account is stale.
Why does Alexa keep losing the same device?
It usually comes down to WiFi: the device is being band-steered between 2.4GHz and 5GHz, or it's at the edge of your signal. A dedicated 2.4GHz-only IoT network fixes most repeat offenders.
Do I need an Echo to control smart devices with Alexa?
Yes — the Echo (or the Alexa app) is the gateway that connects to the skill and your devices. Without it, your phone app for the device still works, but Alexa voice control does not.
My Zigbee device shows offline but my WiFi devices work. Why?
That points to the Zigbee hub or bridge being offline, or a Zigbee-to-WiFi interference issue. Restart the bridge first; if devices keep dropping, consider moving the Zigbee channel away from your WiFi channels.