Power Surge Damage – What to Do Next

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Power surges are caused by lightning during Sydney’s summer thunderstorms, Ausgrid network switching after outages, and large local loads — welders, motors, air conditioners — cycling on shared neighbourhood transformers. A surge can incinerate unprotected electronics in microseconds — if devices have stopped working after a storm or a brief power blink, call 0433 462 902 or book a post-surge inspection.

TVs, modems, oven control boards, alarm systems, garage door openers, air conditioners, and pool controllers are the devices most commonly killed. The next priority is identifying everything that may be quietly damaged before it fails completely — Sydney Electrical Service dispatches 24/7 across every metropolitan suburb.

What This Fault Means

Mains supply in Australia runs at 230 V nominal (with a +10% / -6% tolerance under AS 60038). A surge is anything that spikes well above 250 V for any length of time. Sources include:

Direct lightning strikes — rare, catastrophic, and capable of jumping multiple metres
Indirect lightning — induced voltage in nearby cables; the most common Sydney cause
Network switching events — Ausgrid or Endeavour Energy reconnecting after outages
Large local loads — air conditioner compressors starting on the same transformer
Solar PV inverters — disconnect/reconnect events under grid disturbance
Faulty appliance failures — internal short delivering brief overvoltage upstream

Modern electronics are dramatically more surge-sensitive than appliances of even 20 years ago. A 1990s clock radio could shake off a small spike that would now destroy a smart TV’s HDMI board.

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Common Causes

Storm season strikes (October–March) take out modems, TVs, alarms, and AC controllers
Network switching events on hot summer afternoons damage Wi-Fi gear and PoE devices
A failing inverter or solar string causes localised surges affecting kitchen electronics
Shared transformer loading in dense suburbs (Pyrmont, Zetland, Mascot apartments) creates routine micro-surges
Pool pumps and AC start surges damage shared circuit electronics over time
A surge during a storm in October often reveals a damaged surge protection device that was already at end of life
Old surge diverter (MOV-based) modules in older switchboards have a finite energy capacity and degrade silently

Is It Dangerous?

A surge that destroys a TV is rarely dangerous in itself — the damage is done in microseconds and the device simply stops working. But there are scenarios where surge damage continues to pose risk:

Red flags — call immediately if you see any of these:

A surge-damaged appliance that "still works" may have degraded internal insulation
A burnt-out smoke alarm cannot warn you of fire
A failed surge protector cannot protect against the next surge
A damaged but operating microwave can leak microwave radiation
An AC compressor with damaged windings can short to earth and trip RCDs at random
A solar inverter fault may indicate a DC isolator or string fault that is still hot
Burning smell from any appliance
Smoke from a wall outlet, switchboard, or fixed appliance
A TV, oven, or dishwasher that is hot when off
Repeated tripping of an RCD on the surge-affected circuit
Buzzing or flickering lights that didn't behave that way before

What to Do Right Now

Make a list of every electronic device that stopped working or behaves strangely after the surge.
Unplug damaged devices to prevent further upstream effects.
Check your switchboard for tripped breakers or RCDs and reset once if needed.
Inspect the switchboard for the surge protector — most modern devices have a green/red status window. Red means it's done its job and is now spent.
Check the solar inverter display for fault codes and screenshot any error messages.
Photograph all damage — including device serial numbers and burn marks if visible.
Save the data for insurance — many home and contents policies cover surge damage but require itemised proof.
Don't replace damaged items immediately until the surge protection is repaired or upgraded — a repeat surge will destroy the new gear too.

When You Must Call a Licensed Electrician

Call Sydney Electrical Service on 0433 462 902 if:

Multiple devices are damaged across multiple circuits — indicates a major surge event
You can smell burning anywhere in the house
The surge protector window shows red (or the device is missing entirely)
An RCD has tripped and won’t reset on a surge-affected circuit
A hardwired appliance (oven, AC, pool controller, hot water) is non-functional
Solar PV is showing a fault and won’t auto-restart
Smoke alarms are alarming or behaving erratically
The surge happened during a known network event and you want a damage assessment for insurance

We assess every surge-affected installation methodically: switchboard inspection, surge-protection device test, RCD verification, insulation-resistance test on affected circuits, and itemised report for your insurance claim.

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Why DIY Is Dangerous and Illegal in NSW

Replacing a surge-protection device sounds simple — it isn’t. The work involves:

Isolating mains supply at the main switch (which itself may now be at end-of-life)
Working in the live zone of a 230 V switchboard with a residual hazard from charged capacitors
Selecting the correct Type (Type 1, 2, or 3) for the installation
Verifying earthing, neutral integrity, and equipotential bonding
Certifying the work with insulation-resistance and earth-loop impedance tests

Under NSW law all switchboard work is licensed work, and modifying surge protection requires a licensed electrician under the *Home Building Act 1989* and *Gas and Electricity (Consumer Safety) Act 2017*. DIY replacement risks an arc-flash injury, leaves your installation without verified protection, and voids any future insurance claim where the surge protector failed to operate.

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How to Safely Investigate This Fault

Make a written list
of every device that stopped or behaves strangely after the event.
Unplug damaged devices
to prevent further upstream issues.
Open the switchboard
and check for tripped breakers or RCDs.
Check the surge-protection device window
green is good, red means failed.
Photograph all visible damage
including device serial numbers.
Note the date, time, and weather conditions
for insurance documentation.
Save any solar inverter fault codes
with a screenshot.
Don't replace damaged items
until the surge protection is restored — call **0433 462 902** first.

Frequently Asked Questions

How do I know if my surge protector did its job or if it's now broken?

Most modern Type 2 SPDs (surge protective devices) have a status window — green means functional, red means the device has absorbed energy and reached end of life. A red status means the device must be replaced before the next surge event.

Will my insurance cover surge damage?

Most Australian home and contents policies cover power surge damage to specified items, often with a sub-limit per claim. Requirements vary, but you'll typically need: an itemised list of damaged equipment, photos, original purchase receipts where possible, and a licensed electrician's report. We provide insurance-grade reports as standard.

Can a surge damage my switchboard itself?

Yes. A major surge can degrade busbars, breakers, and surge diverters. After any significant surge event we recommend a switchboard inspection — often the only reliable test is insulation-resistance and thermal imaging.

Is a power board with surge protection enough?

No. Plug-in surge protectors are useful for individual devices but they only protect what's plugged into them, and many older ones have already absorbed surges they don't show. Whole-of-installation Type 2 SPDs at the switchboard are the proper protection.

Can a surge damage my LED downlights?

Yes — and it's increasingly common. LED drivers contain delicate switching electronics that fail under surge. The downlight may still emit some light but flicker, buzz, or run hot. Replace damaged units and check whether the drivers are integral or remote.

My modem keeps "almost working." Could it be a surge?

Likely. Surges often leave devices in a degraded state — booting but unstable, dropping connections, overheating. Replacement is usually the only fix because internal damage is microscopic.

We had a brief power blink and now nothing works. Is that a surge?

A power blink is a switching event — the network briefly disconnects and reconnects. Reconnection often produces a surge. Damage from these "blinks" is one of our most common Sydney callouts after summer thunderstorms.

How quickly can you assess surge damage?

We respond 24/7 for active emergencies and within 24–48 hours for damage assessment. Call 0433 462 902 to book.

Is it safe to keep using my appliances after a suspected power surge?

Not necessarily — surge-damaged appliances can develop internal faults that create a fire or shock risk even if they still appear to work. Hardwired devices like ovens, ducted air conditioners, and dishwashers should be checked by a licensed electrician before continued use if you suspect a surge has run through your home.

What's the difference between a surge protector power board and whole-house surge protection?

A surge protector power board guards only the devices plugged directly into it and can be overwhelmed by a large nearby lightning strike; whole-house surge protection is installed at your switchboard and clamps incoming surges before they reach any circuit in the home, giving every hardwired appliance and outlet a first layer of defence.

How much does it cost to install whole-home surge protection in Sydney?

Cost varies depending on your switchboard type and the protection devices required for your setup, so the right answer is a fixed-price quote. Call 0433 462 902 to book an assessment and we'll price it on the spot.

Who should I call first after a storm surge — Ausgrid or an electrician?

Call Ausgrid (13 13 88) if the street supply is still out or a pole or line is visibly damaged — restoring the network is their responsibility. For damage inside your home to appliances, circuits, or your switchboard, call a licensed electrician; both calls can happen at the same time.

Will my house catch fire if a surge damaged the wiring or an appliance?

A surge can compromise insulation and internal components in hardwired appliances in ways that create a slow-burn fire risk that isn't immediately obvious. If you smell burning plastic, hear buzzing from an outlet or the switchboard, or a breaker keeps tripping after a storm, isolate that circuit and have it inspected before using it again.