Five Deco Nodes, Three Floors and a Mesh Network That Had Been Deleted: a Five-Hour Rebuild (Kuala Lumpur)

Detached house · Kuala Lumpur3 floors5 × TP-Link Deco5-port switch20+ devices5 hours on site

Mesh networks are easy to live with and hard to repair. When one of them fails and the owner has already removed it from the app, there is no configuration left to inspect — the only honest option is to rebuild the whole thing from the ground up. That is what this job was: three floors, five Deco nodes, a switch, more than twenty devices, and five hours on site.

What we were called out for

The house is a three-storey detached property in a residential estate in central Kuala Lumpur.

Five TP-Link Deco mesh units and one five-port TP-Link switch were already installed, plus the router supplied by the provider.
More than twenty devices are connected day to day — phones and laptops, but also cameras, smart home devices and sensors.
The existing mesh had stopped working for reasons nobody could reconstruct, and the owner had already deleted the network from the app.
The brief was to build it again, and to retire the provider-supplied router so the whole house ran on Deco.

Why a deleted mesh has to be rebuilt, not repaired

How the rebuilt network is laid out

Fibre service

→

Deco main node

primary

→

Switch + 4 Deco nodes

3 floors

→

20+ devices

online

The order matters more than people expect. The primary network has to live on the main Deco node before the other units are added, otherwise each node is trying to join a network that does not exist yet. Reset first, migrate the primary, then add nodes one at a time and test each one.

The five hours, step by step

How the rebuild ran, step by step

Read the existing cabling and accounts first

Complex legacy wiring

Migrate the primary network onto the Deco main node

Provider router retired

Factory-reset the other four Deco units

Clean state for pairing

Add nodes one at a time and test before moving on

4 nodes re-paired

Place each node on its floor and re-verify coverage

Network map complete in app

Confirm the switch and wired devices are all back

20+ devices online

Most of the time went into the first step, not the last one.

The existing cabling, devices and account details were complex enough that they had to be understood before anything was touched.
Once the primary network was on the main Deco node, the other four could be reset and added.
Each node was tested where it would actually live, not on the bench, because a node that pairs next to the main unit may not hold once it is carried up a floor.
By the end the Deco app showed a complete network map with every node and every connected device.

Before and after

Before and after · what changed on this network

	Before	After
Primary router	Provider-supplied router in use	TP-Link Deco node as the main router
Mesh status	Deleted from the app, could not be re-joined	All five nodes re-paired and visible
Node placement	Positions no longer matched a working network	One node per floor plus side rooms
Wired devices	Cameras and sensors dropping off	Switch and wired devices all back online
Visibility	No topology view to diagnose from	Full network map in the Deco app

What to do if your own mesh keeps dropping

Mesh faults are genuinely hard to diagnose, and that is not your imagination.

A mesh problem usually only gets diagnosed if you can reproduce it under known conditions. If it has stopped being reproducible, there is very little to work with.
If devices still drop off occasionally and nothing reproduces, rebuilding the mesh from scratch is a reasonable next step rather than a last resort.
Before you delete the existing network, write down the connection details and the account information. Deleting it removes the evidence as well as the fault.
Give a whole-house rebuild real time. Three floors with five nodes and twenty-plus devices took five hours, and rushing the node-by-node testing is what creates the next fault.

Result

Root cause: the previous mesh had failed and had already been deleted from the app, so there was no configuration left to repair. We migrated the primary network onto a TP-Link Deco main node, retired the provider-supplied router, factory-reset the remaining four Deco units and re-added them one at a time, testing each in its final position on each floor. After about five hours the Deco app showed a complete network map, and the switch and the twenty-plus wired and wireless devices were all back online.

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