If your Hive thermostat keeps showing as disconnected, or your heating ignores its schedule, the cause is usually a weak wireless signal between the Hive hub, which sits near your router, and the Hive receiver, which is wired to your boiler.
The fix is almost always a Hive signal booster, a small plug-in relay that carries the signal around thick walls and across longer distances. The important part is knowing where to put it.
The booster itself is straightforward, as the video on this page shows: it plugs in and pairs with your existing Hive system automatically, with no app configuration. This guide covers how to tell whether you need one, where it should go, and what to check if it does not solve the problem.
How the Hive system actually communicates
The hub, thermostat and receiver do not talk over your home wifi. They use a low-power radio protocol called Zigbee.
Zigbee runs at 2.4 GHz, the same band as your wifi, your microwave and most baby monitors. It is energy efficient, but its range is badly affected by physical obstacles.
Think of it like a torch. Excellent across an open field, close to useless pointed through a thick stone wall.
Each part has its own job. The hub connects to your broadband router, which is how the app reaches your heating. The receiver is wired to the boiler and switches it on and off. The thermostat measures the room temperature and sends it across the same Zigbee network. When the Zigbee link between them drops out, the app loses contact and the heating stops following your schedule.
Four signs you need a booster
1. Your boiler is a long way from your router. In open air Zigbee reaches ten to thirty metres. Every wall, floor and ceiling cuts that substantially. As a rough guide, more than two walls or one floor between hub and receiver makes a booster worth considering.
A common layout is the hub in a living room or office next to the router, with the boiler in a utility room, garage or loft at the other end of the house. In that arrangement the signal may simply not reach reliably.
2. You have thick or solid walls. Very common in older properties around Crawley, Horsham and Horley. A solid nine-inch stone wall can cut signal strength by fifty to eighty percent. Modern cavity walls are far more forgiving.
Many older homes locally have solid brick or stone walls that soak up wireless signals. If your home was built before the nineteen sixties with solid walls, and the hub and receiver are on different floors or at opposite ends of the house, a booster is almost always worth having.
3. You have wireless interference. Lots of smart devices, or plaster containing metal lath, which is common in nineteen twenties to nineteen sixties properties. If the connection is erratic, working some days and not others, interference is the usual explanation.
Zigbee shares its band with wifi routers, cordless phones, baby monitors, microwave ovens and your neighbours’ networks. In a busy home, that can turn an otherwise adequate signal into an unreliable one.
4. The app shows the thermostat as offline. The clearest sign. It may also show a last known temperature rather than a live reading. Either way, the link between the hub and the receiver or thermostat has been lost.
Before buying anything, check the hub still has power and a solid green light, and that the receiver at the boiler still has power. If your thermostat runs on batteries, check those too. If everything is powered and it is still offline, a booster is the likely fix.
Where to put it
The key rule is to place it roughly midway between the hub and the receiver. It has to be in range of both to work as a relay, so it should not sit right next to either one.
If your hub is in a ground floor office and the receiver is in a first floor airing cupboard, put the booster in a hallway socket between them, such as the upstairs landing or the top of the stairs.
The booster takes its power from the mains, so you need a free plug socket at that midpoint.
Do put it on the same floor as the obstacle you are trying to get past.
Do use an open hallway or landing.
Do not put it right next to the router or hub, since it will not help from there.
Do not tuck it behind a large metal appliance or inside a boiler cupboard, which recreates the original problem.
Fitting a booster, step by step
- Check the basics first. Hub powered with a solid green light, receiver at the boiler powered, thermostat batteries good if it uses them.
- Find the midpoint. A mains socket roughly halfway between the hub and the receiver, out in the open rather than in a cupboard.
- Plug it in directly at the wall socket.
- Wait a few minutes. It pairs with your Hive system automatically, with nothing to set up in the app.
- Check the app. The thermostat should show a live temperature rather than offline. Give it a day or two of normal use to be sure the connection holds, especially if the problem was intermittent.
Boosters are available from Hive directly and from the major retailers.
A note on older local properties
The housing stock around Crawley, Horsham and Horley runs from post-war estates to Victorian cottages and nineteen thirties semis. The Hive problems we are called to most often are in properties with:
- Solid brick or stone walls, common in homes built before the nineteen sixties
- Boilers in detached outbuildings, garages or rear utility extensions
- A hub at the front of a large house and the boiler at the back or in a loft
- Metal lath plaster ceilings, common in nineteen thirties to nineteen fifties homes around Crawley and Horsham
In nearly all of those, one correctly placed booster resolves it. It is also the simplest fix to try, so start there before anything else.
If a booster does not fix it
- Check the hub connection. A flashing or red light means it has lost internet, which is a router problem rather than a Zigbee one. Check the router is working, and that the hub is back to a solid green light.
- Check the receiver wiring. If it has been knocked or has developed a fault it can lose power entirely. That needs a heating engineer.
- Try a factory reset. Occasionally a hub gets stuck on old firmware. Follow Hive’s instructions for your model.
- Consider the age. Original round Hive hubs do fail. If your system is more than five to seven years old, replacement may be the answer.
When you need an engineer
The booster is a plug-in job anyone can do. These are not:
- Installing a new Hive system. The receiver wires into the boiler’s electrical terminals, and that should always be done by a qualified heating engineer.
- A receiver that has lost power, come loose or developed a wiring fault at the boiler.
- A boiler that does not respond even though the app and thermostat show it calling for heat. At that point the fault is more likely to be in the boiler than in the Hive, and it needs a Gas Safe engineer to look at it.
Our Gas Safe engineers install and repair smart thermostats, including Hive, across Crawley, Horsham, Horley and the surrounding villages. Because they work on boilers as well, a fault on the boiler side can be diagnosed at the same visit rather than bouncing between two trades. For a boiler that will not fire at all, see boiler repairs.
Frequently asked
What does a Hive signal booster actually do?
It extends the Zigbee wireless signal between your Hive hub and your thermostat or receiver. It plugs into a standard mains socket and acts as a relay, bouncing the signal around obstacles such as thick stone walls and across longer distances.
Why does my Hive thermostat keep going offline?
Usually the distance between hub and receiver is too great, thick walls are blocking the Zigbee signal, or other 2.4 GHz devices are interfering. A booster placed midway between the two normally solves it.
How far can a Hive hub signal reach?
Around ten to thirty metres in open air. Through a single solid wall that can drop to as little as five to eight metres, which is why older solid-brick properties around Crawley and Horsham are particularly affected.
Do I need a Gas Safe engineer to fit a Hive booster?
No, the booster simply plugs into a mains socket. However, if you are having a complete Hive system installed, the receiver wires into the boiler terminals and that should always be done by a qualified heating engineer.
Where should I put a Hive signal booster?
Roughly midway between the hub and the receiver, in a mains socket in an open hallway or landing, on the same floor as the obstacle the signal is struggling to get past. Not right next to the router or hub, and not inside a cupboard or behind a large metal appliance.
Does a Hive signal booster need setting up in the app?
No. It plugs into a standard mains socket and pairs with your existing Hive system automatically, usually within a few minutes. The only real decision is where to put it.