A lot of Sydney homes built or renovated in the 2000s and 2010s had a smart home system put in: lighting control, a touchscreen in the kitchen, maybe a keypad by the bed that turns the whole house off. Fifteen years on, those systems are reaching the age where something eventually fails, the touchscreen looks dated, and the company that installed it may no longer be around.
The instinct is often to assume the whole thing has to come out. Usually it does not, and a smart home upgrade is often a smaller job than people expect.
This guide walks through how to decide between repairing what you have, upgrading part of it, or replacing it, and what actually drives the cost of each.
The good news: the wiring usually stays
In most wired smart homes, the expensive and disruptive part of the original job was the cabling: control cable run to every switch position, circuits brought back to the switchboard, all of it pulled while the walls were open.
That cabling rarely wears out. C-Bus, KNX, Dynalite and DALI all run over control cabling that, in most homes, is perfectly reusable. Whatever you decide, the goal is usually to keep it.
That changes the conversation. The question is rarely “rip it all out or live with it”. It is “which parts are worth keeping”.
Four questions that decide it
1. Can you still get the parts?
Every system has components that eventually go out of production: touchscreens, controllers, particular dimmer modules. If the part that failed is still available, or a current replacement is compatible with the rest of your system, a like-for-like repair is usually straightforward.
If the part is discontinued with no compatible successor, the repair may need a different approach, such as swapping a group of modules for a current range.
2. Does anyone have the programming?
This matters more than most owners realise. On a professional system, the programming (every scene, schedule, keypad button and name) is set up by the installer and saved in a project file. Some systems also have passwords that lock the programming.
If you or your original installer still have the project file and any passwords, almost any repair or upgrade is faster. If not, the programming often has to be recovered from the devices or rebuilt, and that is time on site. Either way, ask your original installer for a copy now, while you still can.
3. Is the fault isolated, or is it everywhere?
One failed dimmer in an otherwise healthy system is a repair. Faults appearing across the house, repeated failures after power events, or components failing one after another suggest the system as a whole is reaching the end of its life. Patching that one fault at a time usually costs more than dealing with it properly.
4. What do you want it to do that it cannot?
Plenty of older systems still work perfectly but feel dated: no phone app, no link to the air conditioning or security, a touchscreen that shows its age. If the real complaint is how you control the house rather than whether it works, that points to an upgrade, not a repair.
Your smart home upgrade options, from smallest to largest
Option 1: Repair like-for-like
Replace the failed part, restore the programming, and carry on. Right for a healthy system with a single fault and parts still available.
Option 2: Keep the backbone, replace the controls
This is the option most owners do not know exists. The wired lighting system stays in place (the dimmers, relays and cabling) and a modern control platform connects to it through a gateway. You get a current app, new touchscreens or keypads, and links to your other systems, without rewiring the house.
Whether it suits your home depends on the system you have and what you want to connect to it, but for a lot of older C-Bus and Dynalite homes it is the best value upgrade available. Our pages on C-Bus repairs and Dynalite repairs cover those systems specifically.
Option 3: Replace in stages
Upgrade one area or floor at a time, usually starting with the rooms you use most. It spreads the work out and lets old and new run side by side for a while, as long as the plan is set up for that from the start.
Option 4: Full replacement
Sometimes it is the right call: during a major renovation where the walls are open anyway, when the system is failing broadly, or when what you want now is fundamentally different from what was installed. If a renovation is on the cards, see smart home renovations and retrofits.
What drives the cost
We do not publish prices, because two jobs that sound the same can be very different on site. These are the things that actually move the number:
- Whether the existing cabling is reusable. This is the biggest single factor.
- Whether the project file and passwords exist. Rebuilding programming from nothing takes time.
- The size of the system: how many circuits, keypads and rooms.
- How much you want to change: a repair, a new control layer, or a new system.
- Access: where the switchboard is, the ceiling space, and how easily the equipment can be reached.
A site assessment answers all five, which is why it is the sensible first step before committing to anything.
Signs it is time to stop repairing
- The same kind of fault keeps coming back
- Parts for your system are no longer made and nothing compatible replaces them
- Nobody has the programming and the system needs frequent changes
- You are spending on repairs to a system that no longer does what you want
Frequently asked questions
Is it worth upgrading an old smart home system?
Often, yes, particularly if the cabling is sound. Keeping the wired backbone and replacing the controls on top can give you a modern system with far less disruption than starting again.
Can I keep my C-Bus system and add a new app?
In many cases. A modern control platform can often connect to an existing C-Bus network through a gateway, keeping the dimmers and cabling in place. It depends on your particular system, which a site visit confirms.
What happens if nobody has my system’s programming file?
The programming can often be recovered from the devices or rebuilt, but it takes longer. If your original installer is still reachable, ask them for the project file and any passwords now.
Do I have to rewire my house to replace a smart home system?
Usually not. In most wired homes the existing control cabling can be reused, even when the equipment connected to it is replaced.
My installer has closed down. Who can work on my system?
Independent integrators can work on most mainstream systems. Read more on what to do when nobody will service your smart home.
Related reading
- Lost Your C-Bus Programming File? How C-Bus and Dynalite Systems Are Recovered
- C-Bus vs Dynalite vs KNX: How to Tell Which Lighting Control System You Have
- C-Bus Not Working? Common C-Bus Faults and What They Usually Mean
- Dynalite Not Working? Common Philips Dynalite Faults Explained
Talk to us about your system
We repair, upgrade and replace smart home systems across Sydney’s Northern Beaches, Eastern Suburbs, North Shore and Northern Suburbs, and we are happy to look at a system someone else installed.
Sam Doolan · 0479 122 450 · sam@hyperautomation.com.au
Or start with smart home troubleshooting: what to check first.