Menu labels and LED meanings can vary by model and hardware version. Keep the product label and official manual available while following this guide.
1. Identify which devices are affected
A red Deco light normally indicates loss of Internet or a node connection problem; check whether it is the main or satellite unit.
2. Check Internet and local login
If a satellite is slow, test it closer to the main unit or use Ethernet backhaul.
3. Restart the network in order
Mixed Deco models can work together, but the topology and capabilities may affect which unit is best as the main Deco.
4. Update, reset or restore carefully
Avoid placing nodes in cabinets, behind televisions or at the far edge of existing coverage.
5. Escalate model-specific faults
Record the model, hardware version, firmware, LED state and tests completed before consulting the official support channel or ISP.
TP-Link Deco Mesh Wi-Fi FAQs
Can different Deco models work together?
Many Deco models can share a network, though features and backhaul performance can vary.
Does Deco replace the modem?
Usually no. It connects to a modem or fibre terminal and can replace the routing and WiFi functions.
Why is my Deco red?
It can indicate no Internet on the main unit or loss of mesh connectivity on a satellite.