Why doesn't my Wi-Fi reach my whole home?

Dead spots are almost always a coverage problem, not a speed problem — one router can only cover so much of an older building.

Almost always, this is a coverage problem, not a speed problem. Your fiber line is delivering full speed to the router; the Wi-Fi just isn't making it to the far bedroom.

Run a speed test on a device plugged into the router with an Ethernet cable. If that's fast and the far room is slow, the line is fine and the Wi-Fi is the bottleneck. (See Connect a device by Ethernet.)

Your router broadcasts on both bands, and they trade off against each other:

• 2.4 GHz travels further and through more walls, but is slower and heavily congested in dense neighborhoods.
• 5 GHz is much faster but loses ground quickly through plaster, brick, and floors.

Most routers publish both under one network name and move devices between them automatically — that's band steering. It usually works, but it can leave a device clinging to a weak 5 GHz signal from three rooms away instead of dropping to 2.4 GHz. Turning Wi-Fi off and back on on that device forces it to re-pick.

1. Move the router first. It's free. See Where should I put my router?
2. Mesh, not an extender. A mesh system uses two or three units that hand devices off cleanly under one network name. A cheap single extender rebroadcasts a weak signal and often halves throughput to everything using it — it can make the far room worse, not better.
3. Wire the backhaul — this is the real fix. Mesh nodes talk to each other over Wi-Fi by default, and in a plaster-walled building that link is the weakest part of the chain. Run an Ethernet cable between the main router and the far node and the dead spot usually disappears entirely. In a triple-decker, one cable up the stairwell or through an existing chase beats any amount of tuning.
4. Consider what the room needs. A wired desktop or TV takes load off the Wi-Fi for everything else.

• $10/mo — TP-Link HX510. Wi-Fi 6, three LAN ports. The right choice for most homes on Base 300, Core 500 or Gigabit.
• Bring your own. If you are a power user, we would rather you did. Someone running VLANs, their own firewall, a NAS, or a mesh system they have already tuned will do better with their own equipment than with ours — and 2 Gig and 10 Gig are bring-your-own-router regardless.

If that didn’t work

Call (617) 693-9434 and tell us which rooms are bad; we can help you figure out whether it's placement, hardware, or wiring.

More in Manage Services & Equipment

• How do I find my Wi-Fi password?
• How do I change my Wi-Fi name or password?
• Can I use my own router?
• Where should I put my router?
• How do I connect a device with an Ethernet cable?
• What router does Boston Broadband provide?

Talk to us

Call (617) 693-9434, Monday to Friday 8am–6pm ET, or email [email protected]. We answer within 24 hours, and usually within an hour.

Boston Broadband is a service-area business serving Boston, Brookline and Cambridge, Massachusetts. There is no counter to walk up to — phone, email and your account at myaccount.bostonbroadband.com are the ways in.