If your TP-Link Deco keeps disconnecting, it's usually fixable without buying anything. Work through these in order, because the early ones are the quickest and solve most cases.
1. First, figure out what is actually dropping
Before changing anything, notice the pattern:
- Every device drops at once: likely the internet connection, the modem, or the main Deco.
- Only far-away rooms drop: likely node placement or signal between units.
- Only one device drops: likely that device's WiFi settings or driver, not your Deco.
- Drops at the same time daily: likely a firmware update, a scheduled reboot, or interference at that hour.
2. Restart everything in the right order
Doing this out of order is a common reason restarts fail.
- Unplug the modem and all Deco units.
- Wait about 2 minutes.
- Plug in the modem and wait until it is fully online.
- Plug in the main Deco (the one wired to the modem) and wait until its light settles.
- Plug in the other Deco units, one at a time.
3. Check the connection between your Deco units
Open the Deco app and look at each unit's status and its connection quality to the main unit. A weak link here is the most common cause of mesh dropouts. If the app reports a poor connection, move on to the next step.
4. Move your nodes
- Place each satellite roughly halfway between the main Deco and the dead zone, not in the dead zone itself.
- Keep units in the open, off the floor, and away from metal shelving, aquariums, microwaves, and thick walls.
- Avoid placing a node inside a cabinet or behind a TV.
- After moving, give the app a minute and recheck the connection quality.
5. Update the firmware
Open the Deco app and check for a firmware update in the settings or More menu (the wording varies by app version). Update the main unit and every satellite, and leave them powered while it installs. Outdated firmware is a frequent cause of random disconnects.
6. Check for a double-router (double NAT) setup
If your internet provider's gateway is also a router, two routers fighting each other can cause drops and slow speeds.
- Ask your provider how to put their gateway into bridge mode or IP passthrough, or
- Set the Deco to Access Point mode in the app if you want the provider's gateway to remain the router.
Changing this affects your whole network, so note your settings first.
7. Use Ethernet between units (wired backhaul)
If your home has Ethernet cabling, or you can run a cable, connect a satellite Deco to the main Deco with a wired link. This removes wireless interference between units and is the most reliable fix for repeat dropouts. If you already use a wired link, swap in a different cable to rule it out.
8. Reset as a last resort
If nothing above helps, factory reset the affected Deco using its reset button, then set it up again in the app. This erases your settings, including WiFi names and passwords, so only do it once the earlier steps fail.
If only one device drops
Look at that device instead. Forget the WiFi network and reconnect, update its network driver or operating system, and turn off any power-saving option for its WiFi adapter.
