Reviewed by Lee Gundenswager (Lead Electrician, Connex Lic #92217) and Darren Standring (Owner). Last updated May 2026.
Your switchboard is the heart of your home’s electrical system. Every circuit — lights, power points, air conditioning, hot water — runs through it. When it fails, everything fails. And in North Brisbane, we see switchboards fail every week.
Here are the 7 warning signs that your switchboard needs replacing — and what to do about each one.
1. Ceramic Fuses Instead of Circuit Breakers
If you open your switchboard and see round ceramic fuses with wire elements, your board dates from the 1960s-1980s. These are the most common boards we replace across Stafford, Wavell Heights, Aspley, and Chermside — the inner north suburbs built during that era.
Ceramic fuses don’t have safety switches (RCDs). They can’t protect you from electric shock. They also can’t handle the electrical loads of modern homes — air conditioning, induction cooktops, EV chargers, and home offices drawing power that these boards were never designed for.
Risk level: High. These boards should be replaced as a priority.
2. Safety Switch Keeps Tripping
If your safety switch trips regularly, something is wrong. Common causes include:
- Faulty appliance leaking current to earth
- Water ingress to outdoor power points or light fittings
- Degraded wiring insulation (common in homes over 30 years old)
- Overloaded circuits drawing more current than the safety switch allows
- The safety switch itself has reached end of life (they don’t last forever — typically 15-20 years)
We see this constantly in Kallangur, Petrie, and Lawnton homes from the 1990s-2000s that had basic switchboards installed during construction. A switchboard upgrade with individual RCBOs on every circuit means a fault on one circuit doesn’t kill power to the entire house.
3. Burning Smell or Discolouration
A burning smell from your switchboard is an emergency. Turn off the main switch immediately and call us on 0474 207 609. Common causes:
- Loose connections generating heat (wiring expands and contracts over decades)
- Overloaded circuits melting insulation
- Corroded terminals creating resistance and heat
- Water damage from roof leaks reaching the switchboard
Brown or black marks around circuit breakers or fuse holders are signs of previous overheating. Even if there’s no smell right now, visible discolouration means the board needs inspection and likely replacement.
4. Lights Flicker or Dim When Appliances Turn On
If your lights dim when the air conditioner kicks in, or flicker when you turn on the kettle, your switchboard circuits are likely overloaded. This is especially common in:
- Everton Park and McDowall homes where families have added AC units over the years without upgrading the switchboard
- North Lakes project homes where builders installed minimum-spec boards with no spare capacity
- Any home where the kitchen, laundry, and air conditioning share circuits
The fix is usually a switchboard upgrade with dedicated circuits for high-draw appliances.
5. You Can’t Add New Circuits
Want to install an EV charger, add air conditioning, or wire a home office? If your switchboard has no spare circuit breaker positions, you need an upgrade before any new work can happen.
Many switchboards in Deception Bay, Morayfield, and Caboolture homes are completely full — every position used. We replace these with larger boards that have room for current needs plus future additions like solar, battery storage, or pool equipment.
6. No Safety Switches at All
Queensland law requires safety switches (RCDs) on all power point circuits in residential properties. If your board doesn’t have any safety switches — or only has them on some circuits — it’s non-compliant.
This is a common issue when selling or renting a property. The pre-sale electrical inspection will flag missing safety switches, and they must be installed before settlement. We handle this as part of a switchboard upgrade — typically a half-day job.
7. The Board Is Over 25 Years Old
Even if your switchboard appears to be working fine, boards over 25 years old have components that degrade with age. Circuit breakers can fail to trip when they should. Wiring insulation inside the board becomes brittle. Bus bars corrode. The board was designed for electrical loads that were a fraction of what a modern household draws.
If your home was built before 2000 and the switchboard hasn’t been replaced, it’s worth having it assessed. We provide free assessments across North Brisbane — no obligation, just an honest opinion on whether it needs replacing now or can wait.
What a Switchboard Upgrade Involves
A switchboard upgrade with Connex Electrical includes:
- Removal of old board (ceramic fuses, old circuit breakers)
- Installation of new Hager or Clipsal switchboard
- Individual RCBOs (combined circuit breaker + safety switch) on every circuit
- Surge protection for sensitive electronics
- Spare capacity for future additions
- Full labelling, testing, and certificate of compliance
Typical cost: $900–$2,200 depending on the number of circuits and condition of existing wiring. Most upgrades are completed in 4-6 hours.
Frequently Asked Questions
Will I lose power during the upgrade?
Yes, for approximately 2-4 hours while we swap the board. We coordinate with you to find a convenient time. We can usually keep the fridge circuit live for most of the process.
Do I need to upgrade my switchboard before selling?
If your board doesn’t have safety switches on all power circuits, yes — it won’t pass a pre-sale electrical inspection. Better to get it done proactively than under pressure before settlement.
Can you upgrade just the safety switches without replacing the whole board?
Sometimes, if the existing board is in good condition and has compatible positions. But if you’re running ceramic fuses or the board is over 25 years old, a full replacement is more cost-effective and safer.
What’s the difference between a safety switch and a circuit breaker?
A circuit breaker protects wiring from overload and short circuits. A safety switch (RCD) protects people from electric shock. You need both. Modern switchboards combine them into RCBOs — one device that does both jobs.
Concerned about your switchboard? Call Connex Electrical on 0474 207 609 for a free assessment. Licensed (#92217), insured ($20M), and 494+ five-star reviews.