An electrical burning smell is a sharp, acrid odour caused by overheating wires, melting insulation, or faulty components within your home’s electrical system. Melbourne homes with ageing wiring and outdated switchboards are at the highest risk.
Bayside and south-east Melbourne suburbs with pre-1980s housing stock face this issue more than most, particularly during summer when electrical loads peak. Byrd Electrical provides emergency and scheduled electrical services across Melbourne and Bayside. This guide covers what causes that smell, how to identify the source, whether it’s dangerous, and when to call a licensed electrician.
Why an Electrical Burning Smell Is a Serious Warning Sign
An electrical burning smell means something in your wiring, switchboard, or connected devices is generating excessive heat. It is never normal and should never be ignored.
According to Energy Safe Victoria, fire brigades respond to more than 300 domestic electrical fires in Victoria each year. Many start from old wiring that has degraded or cannot cope with modern electrical demands. The CFA reports that on average, 3,000 house fires occur across Victoria annually, with electrical faults and faulty appliances among the leading causes.
In my 15 years servicing homes across Melbourne’s Bayside and south-east suburbs, I’ve attended hundreds of call-outs where a burning smell was the only warning before a serious fault developed. The smell is your home’s way of telling you something is wrong. The question is where, and how urgently you need to act.
What Does an Electrical Burning Smell Actually Smell Like?
An electrical burning smell is distinct from cooking or wood smoke. It typically presents as a sharp, chemical odour that most people describe as burning plastic, hot metal, or an unusual fishy scent.
The specific smell depends on which component is overheating:
- Burning plastic or rubber: This is the most common description. It comes from wire insulation or plastic cable sheathing melting under excessive heat. PVC-insulated cables used in homes built from the 1970s onward produce a sharp, acrid fume when they overheat. Homes in suburbs like Cheltenham, Mentone, and Moorabbin with original 1960s to 1970s wiring are particularly prone to this.
- Fishy or ammonia-like odour: Overheating circuit boards, power point faceplates, and light switch components made from urea-formaldehyde resin can produce a fishy smell when they degrade. This catches many homeowners off guard because it doesn’t immediately register as “electrical.”
- Hot metallic scent: Arcing faults at loose connections or corroded terminals generate a faint metallic smell, often accompanied by a slight buzzing sound. Older switchboards in Brighton, Sandringham, and Hampton homes with original ceramic fuse holders are common sources.
- Burnt dust or ozone smell: New heaters, downlights, or appliances running for the first time may produce a brief burning dust smell. This usually dissipates within 30 minutes. If it persists, the appliance or its wiring has a fault.
If the smell lingers, returns repeatedly, or gets stronger, the cause is not dust. Something is overheating, and you need to act.
Common Causes of an Electrical Burning Smell in Melbourne Homes
An overheating electrical component is always the root cause. The specific trigger varies depending on the age of your home, the condition of your wiring, and how much load your system carries.
These are the most frequent causes I encounter on fault diagnosis jobs across Melbourne:
Overloaded Circuits
Running too many high-draw appliances on a single circuit forces wires to carry more current than they’re rated for. This causes sustained overheating. Kitchens and home offices are the worst offenders. If your circuit breaker keeps tripping before you notice the smell, your system is already telling you the load is too high.
Deteriorated or Ageing Wiring
Homes built before the 1980s often have rubber-sheathed or early PVC cabling that degrades over time. The insulation becomes brittle, cracks, and exposes conductors. This is extremely common in older Bayside suburbs like Black Rock, Beaumaris, and Highett. Energy Safe Victoria recommends that any home built before the 1980s have its wiring inspected by a licensed electrician. A full home rewiring may be required if the cabling has deteriorated.
Loose Connections
Wires that are not securely fastened at terminals generate resistance. Resistance creates heat. Over time, that heat scorches the connection point and produces a burning smell. This often happens inside switchboards, behind power points, and at light fitting terminals. It’s one of the most dangerous faults because it can smoulder behind walls for weeks before anything visible occurs.
Faulty or Damaged Appliances
An appliance with worn internal wiring, a damaged heating element, or a failing motor can produce a burning smell at the power point. Older heaters, clothes dryers, and dishwashers are common culprits. The smell may come and go depending on when the appliance cycles on.
Switchboard Faults
Outdated switchboards with ceramic fuses, corroded bus bars, or undersized main switches frequently overheat under modern loads. If the burning smell is strongest near your switchboard, this is likely the source. A switchboard upgrade replaces old components with modern circuit breakers and RCD safety switches rated for current demand.
More: Do I Need a Switchboard Upgrade and When Should I Get One?
Why You Smell Burning but Can’t See Anything
Smelling an electrical burning smell with no visible source is one of the most reported concerns I hear from Melbourne homeowners. This happens because the fault is hidden from view.
Electrical wiring runs through wall cavities, ceiling spaces, and under floors. A loose connection behind a plasterboard wall or a deteriorating cable in the roof cavity can overheat and produce fumes that travel through gaps in the wall lining. You smell it in the room, but there’s nothing visible to point to.
This scenario is actually more dangerous than a visible fault. A concealed overheating wire can smoulder for hours or days, slowly charring surrounding timber framing, before igniting. According to the CFA, electrical appliances, power boards, and extension cords are a major cause of house fires in Victoria.
If you smell burning but can’t see the source, do not dismiss it. Turn off the main switch at your switchboard and call an emergency electrician immediately.
Is an Electrical Burning Smell Toxic?
Yes. Fumes from overheating electrical components can be harmful, particularly in enclosed or poorly ventilated spaces.
When PVC cable insulation burns, it releases hydrogen chloride gas and other irritants. Short-term exposure can cause headaches, dizziness, throat irritation, and nausea. In a confined room with poor airflow, prolonged inhalation poses a genuine health risk, especially for children, elderly residents, and anyone with respiratory conditions.
The fumes from burning urea-formaldehyde components (older power point faceplates and switch housings) release formaldehyde vapour, which is a known irritant. If you notice a strong electrical burning smell in your home, open windows and doors immediately to ventilate the space. Do not stay in a room where the smell is concentrated and getting stronger.
What to Do When You Smell Electrical Burning
The correct response to an electrical burning smell depends on the severity. Not every situation requires an emergency call, but every situation requires investigation.
Follow this decision framework:
| Scenario | Urgency | What to Do |
| Faint smell that disappears after turning off an appliance | Monitor | Unplug the appliance. Inspect the plug and cord for damage. Do not use it again until checked. |
| Smell from a specific power point or switch | Urgent | Turn off the circuit at the switchboard. Stop using that power point. Book an electrical repair within 24 hours. |
| Smell near the switchboard | Urgent | Turn off the main switch. Call a licensed electrician for a same-day inspection. |
| Burning smell with no visible source | Emergency | Turn off the main switch. Ventilate the home. Call a licensed electrician immediately. |
| Smell with visible smoke, sparking, or heat from a wall | Emergency | Evacuate. Call 000. Do not touch the switchboard. |
The key principle is simple. If in doubt, switch off the power at the main switch and call a professional. A false alarm costs you nothing. A missed warning can cost you your home.
How a Licensed Electrician Diagnoses the Source
Tracking down a concealed electrical burning smell requires systematic testing that only a qualified professional can perform safely.
Here is the process I follow on every burning smell call-out:
Initial Assessment and Isolation
I start by asking you when the smell first appeared, which rooms are affected, and which appliances were running. This narrows the search area. I then isolate circuits one at a time at the switchboard to identify which circuit is producing the fault.
Visual Inspection
The switchboard cover comes off first. I check for scorched terminals, discoloured wiring, melted insulation, and signs of arcing on bus bars. I then inspect power points, light switches, and junction boxes in the affected area for burn marks or heat damage.
Thermal Imaging
An infrared camera reveals hot spots behind walls, inside switchboards, and at connection points that are invisible to the naked eye. This is one of the most effective tools for finding concealed faults. A connection running 30 to 40 degrees above ambient temperature is a clear sign of resistance heating.
Insulation Resistance Testing
I test each circuit’s insulation resistance with a megger to check whether the cable insulation has broken down. Low readings confirm degraded wiring that needs replacement. This test is particularly important in pre-1980s homes across Elsternwick, Glen Huntly, and Carnegie, where original cabling is still in service.
Repair or Replacement
Once the fault is identified, I provide upfront pricing for the repair. This might involve re-terminating a loose connection, replacing a damaged section of wiring, upgrading a switchboard, or recommending a full electrical safety inspection if multiple issues are found.
Why Melbourne Homes Are at Higher Risk
Melbourne’s housing stock, climate, and electrical infrastructure create conditions that increase the likelihood of electrical burning smells and the faults that cause them.
- Pre-1980s housing dominates Bayside and the inner south-east. Suburbs including Brighton, Sandringham, Hampton, Bentleigh, and Ormond have large concentrations of homes built in the 1950s through the 1970s. Many still have original wiring that pre-dates modern safety standards. According to Energy Safe Victoria, homes built before the 1980s should have their wiring inspected by a licensed electrician before relying on the existing system.
- Older switchboards without safety switches. Many properties across Oakleigh, Caulfield, and Malvern still have ceramic fuse boards or early circuit breaker panels without RCD protection. These boards lack the ability to detect earth leakage faults that cause overheating. The Energy Safe Victoria Test Reset Protect campaign urges all Victorians to check whether their switchboard has working safety switches and to test them annually.
- Summer peak loads. Melbourne’s hot summers push air conditioning systems, fans, and refrigeration to maximum draw. Homes with undersized switchboards or ageing wiring bear the heaviest strain during heatwaves, increasing the risk of overheating.
- Coastal salt air exposure. Properties in bayside suburbs like Aspendale, Chelsea, and Bonbeach experience accelerated corrosion on exposed terminals, switchboard components, and external connection points. Corroded contacts create resistance, and resistance generates heat.
- Renovation work on old wiring. Adding new circuits, downlights, or appliances to a home without upgrading the switchboard or checking existing wiring capacity is a recipe for overloading. I see this regularly in Camberwell, Glen Iris, and Armadale, where period homes undergo modern renovations.
More: Signs Your Home Is at Risk of an Electrical Fire
How to Prevent Electrical Burning Smells
Preventing an electrical burning smell means addressing the conditions that cause overheating before a fault develops.
These are the most effective steps you can take:
Book a Periodic Electrical Safety Inspection
An electrical safety inspection every five years (or sooner for pre-1980s homes) identifies deteriorated wiring, overloaded circuits, and faulty connections before they become dangerous. This is the single most effective preventative measure.
Test Your Safety Switches Every Three Months
Press the test button on each RCD safety switch on your switchboard. The power should cut immediately. If it doesn’t, the switch has failed and needs replacement by a licensed electrician. If your switchboard has no safety switches at all, that’s an urgent upgrade.
Avoid Overloading Power Points
Do not daisy-chain power boards or run multiple high-draw appliances from a single circuit. Heaters, air conditioners, and kitchen appliances should ideally have dedicated circuits. Byrd Electrical can assess your circuit layout and recommend additional circuits where needed.
Replace Ageing Appliances and Cords
Frayed cords, cracked plugs, and appliances older than 10 years with signs of wear should be retired. A faulty appliance is one of the easiest problems to fix and one of the most common causes of a burning smell at the power point.
Upgrade Your Switchboard
If your home still has a ceramic fuse board or an early circuit breaker panel without RCDs, a switchboard upgrade brings your system up to current AS/NZS 3000 Wiring Rules requirements. It’s the foundation of a safe electrical system.
After completing a switchboard upgrade and safety inspection at a property, the Byrd Electrical team received this feedback: “I highly recommend Byrd Electrical for any electrical needs. They are professional in their correspondence from the quote stage, and their workmanship is excellent. We had the pleasure of having Leon, Lionel and Patrick attend our property, and I cannot fault them. It is refreshing to deal with such a professional company. Will definitely use them in the future.” Heidi Maddern.
Getting older homes up to current safety standards is one of the most common jobs I handle across Melbourne’s south-east.
Areas We Service
Byrd Electrical services homes across Melbourne and Bayside, including Brighton, Sandringham, Hampton, Beaumaris, Black Rock, Cheltenham, Mentone, Moorabbin, Bentleigh, Highett, Elsternwick, Carnegie, Oakleigh, Caulfield, Glen Huntly, Glen Iris, Malvern, Camberwell, Armadale, Ormond, St Kilda, Elwood, Prahran, Toorak, Bonbeach, Chelsea, Aspendale, Parkdale, Mordialloc, and surrounding suburbs.
Don’t Wait for a Burning Smell to Become a Fire
If you notice an electrical burning smell in your home, call Byrd Electrical on (03) 9000 0666 during business hours. Our licensed electricians provide professional electrical inspections, fault finding, repairs, and safety support across Melbourne and Bayside, backed by our On Time or We Pay You $200 promise and 100+ year extended workmanship guarantee.
Frequently Asked Questions
What does an electrical burning smell actually smell like?
It’s a sharp, acrid odour similar to burning plastic, hot metal, or in some cases, a fishy smell. The scent depends on which material is overheating in your home’s electrical system.
Can an electrical burning smell harm you?
Yes. Fumes from burning PVC insulation release hydrogen chloride and other irritants that cause headaches, nausea, and throat irritation. Ventilate the area immediately and leave the room if the smell is strong.
How long does an electrical burning smell last?
A smell caused by dust on a new appliance fades within 30 minutes. If the smell persists or returns, an active electrical fault is generating the odour, and it will continue until the fault is repaired.
How do you find the source of an electrical burning smell?
A licensed electrician uses circuit isolation, thermal imaging, and insulation resistance testing to trace the fault. Melbourne homes with concealed wiring in wall cavities often require thermal imaging to locate the source.
Why do I smell electrical burning but nothing is there?
The fault is likely concealed inside a wall cavity, ceiling space, or behind a switchboard cover. Wiring faults can smoulder out of sight for days. This is a serious situation that requires an emergency electrician.
When should I call an electrician for a burning smell?
Call immediately if the smell is near your switchboard, has no visible source, or is accompanied by flickering lights, tripping circuit breakers, or warm power points. Do not wait to see if it goes away.
