Written by H. Irwin Electrical | Published on June 2025
Flickering lights are one of the most common electrical complaints Adelaide homeowners report, and the cause can range from a loose globe to a dangerous wiring fault. In most cases, occasional flickers from a single bulb are harmless. But persistent flickering, flickering across multiple rooms, or flickering paired with buzzing sounds or tripped breakers should never be ignored.
This guide covers the most common reasons lights flicker, which warning signs point to a serious electrical problem, and exactly when you should pick up the phone and call a licensed electrician. Whether you live in Glenelg, Unley, Hyde Park, or Henley Beach, the same rules apply to keeping your home safe.
Understand the Most Common Causes of Flickering Lights
Not all flickering is equal. Some causes are minor and easy to fix yourself. Others require a licensed electrician to diagnose and repair safely. Knowing the difference saves you time and keeps your household safe.
- Loose or faulty light globe: The most common cause. A globe that is not fully seated in its fitting will flicker, especially when vibration occurs nearby.
- Incompatible dimmer switch: Many older dimmer switches are not compatible with LED globes. This mismatch causes persistent flickering even when the globe and wiring are perfectly fine.
- Loose wiring connections: Wiring that has worked loose over time creates intermittent contact and causes flickering. This is a fire risk and requires a licensed electrician.
- Voltage fluctuations: If lights flicker when large appliances like air conditioners or washing machines switch on, your home may be experiencing voltage fluctuations.
- Overloaded circuits: Too many appliances drawing power on a single circuit can cause lights to dim or flicker, particularly in older Adelaide homes with limited circuits.
- Faulty switchboard or main connection: Flickering throughout the whole house often points to a problem at the switchboard or the main incoming supply connection.
Start with the simplest explanation first. Check the globe is seated correctly and try swapping it out. If the flickering continues, the cause is likely further along the electrical system.
Spot the Warning Signs That Point to a Serious Problem
Some flickering is a genuine electrical emergency in progress. These warning signs mean you should stop using the affected circuit and call a licensed electrician straight away.
- Flickering lights paired with a burning smell or scorch marks near switches and power points
- Lights flickering in multiple rooms or throughout the whole house simultaneously
- Circuit breakers tripping repeatedly around the same time lights flicker
- Buzzing, crackling, or humming sounds coming from light fittings or the switchboard
- Lights flickering when you touch or move a switch or power point
- Flickering that started suddenly with no obvious change to globes or appliances
These symptoms suggest loose connections, failing switchboard components, or wiring faults. Left untreated, these faults can cause electrical fires. H. Irwin Electrical regularly attends urgent callouts across Glenelg, Marion, Plympton, and surrounding suburbs for exactly these kinds of issues.
Compare DIY Fixes vs. When You Need a Licensed Electrician
There are a small number of things you can safely check yourself before calling an electrician. Anything beyond this list legally requires a licensed tradesperson in South Australia.
| Cause of Flickering | DIY Safe? | Action Required |
|---|---|---|
| Loose or unseated light globe | Yes | Turn off the switch, reseat or replace the globe |
| Incompatible LED and dimmer switch | Partial | Replace globe with a dimmer-compatible LED, or have an electrician swap the dimmer |
| Loose wiring at the fitting or switch | No | Call a licensed electrician, do not open fittings yourself |
| Voltage fluctuations from appliances | No | Electrician inspection to assess circuit load and wiring capacity |
| Overloaded circuit | No | Electrician to redistribute loads or add a new circuit |
| Faulty switchboard or main connection | No | Urgent electrician callout, do not delay |
South Australian law is clear. Electrical work beyond changing a globe or a power board must be carried out by a licensed electrician. This protects you legally and keeps your home insurance valid.
Understand How Older Adelaide Homes Are More at Risk
Many homes across suburbs like Glandore, Kurralta Park, Prospect, Beverley, and Richmond were built in the 1960s, 70s, and 80s. These homes were wired for a fraction of the electrical load a modern household demands.
Older switchboards may still use ceramic fuses rather than modern safety switches and circuit breakers. These systems offer far less protection and are more prone to faults that cause flickering, tripping, and in worst cases, fires.
If your home is more than 25 years old and you are experiencing regular flickering, there is a good chance the underlying issue is an undersized or ageing electrical system rather than a single faulty fitting.
Common signs that an older Adelaide home needs an electrical inspection include:
- Fuse box still uses ceramic fuses rather than circuit breakers
- No safety switch (RCD) installed on the switchboard
- Power points are two-pin rather than three-pin
- Lights dim noticeably when large appliances switch on
- You have added significantly more appliances since moving in
H. Irwin Electrical carries out full electrical safety inspections across Glenelg North, Somerton Park, West Beach, Fulham, and North Adelaide. An inspection gives you a clear picture of what your system can handle and what needs upgrading.
Review the Typical Costs for Diagnosing and Fixing Flickering Lights in Adelaide
Costs vary depending on the root cause. A simple globe or dimmer fix is very affordable. Wiring faults and switchboard work sit at the higher end of the scale. Here is a general guide for Adelaide in 2025.
| Job Type | Estimated Cost Range (AUD) | Notes |
|---|---|---|
| Service call / inspection fee | $80 – $150 | Often waived or credited if work is booked |
| Replace dimmer switch (per switch) | $80 – $180 | Includes labour and compatible dimmer |
| Repair loose wiring connection | $120 – $300 | Depends on accessibility and number of faults |
| Circuit upgrade or new circuit | $300 – $700 | Required for overloaded or undersized circuits |
| Switchboard upgrade (safety switch install) | $800 – $2,000+ | Varies with board size and complexity |
| Full electrical safety inspection | $150 – $350 | Recommended for homes over 20 years old |
These figures are indicative. Every job is different, and the only way to get an accurate price is to have a qualified electrician assess your specific situation. Getting the right diagnosis first avoids paying for work that does not solve the problem.
Know When Flickering Lights Are an Electrical Emergency
Some situations cannot wait for a routine booking. If you notice any of the following, treat the situation as an emergency and call immediately.
Turn off the affected circuit at the switchboard if you can do so safely, and do not use the circuit until it has been inspected. If you smell burning or see sparks, leave the property and call 000 first, then your electrician.
- A burning or hot plastic smell near any light switch, fitting, or power point
- Visible scorch marks, discolouration, or melted plastic around electrical fittings
- Sparks coming from a switch or fitting when you operate it
- Flickering that escalates rapidly or is accompanied by power outages
- Any sign that a circuit breaker is failing to trip when it should
H. Irwin Electrical provides urgent electrical callouts across Adelaide, including suburbs like Hyde Park, Henley Beach, and North Adelaide. Do not wait on issues like these hoping they resolve on their own. They rarely do.
FAQs on Flickering Lights and Electrical Safety
Is it normal for lights to flicker occasionally?
A very occasional flicker from a single globe is usually harmless and often caused by the globe being slightly loose or nearing the end of its life. If flickering is frequent, involves multiple lights, or is accompanied by other symptoms like buzzing or tripped breakers, it needs to be investigated by a licensed electrician.
Can flickering lights cause a house fire?
Yes, in some cases. Flickering caused by loose wiring connections creates arcing, which generates intense heat and is a leading cause of house fires. If your flickering is paired with a burning smell, warm switch plates, or scorch marks, treat it as urgent and call a licensed electrician immediately.
Why do my lights flicker when the air conditioner turns on?
Air conditioners draw a large surge of current when they start up. If your wiring or switchboard cannot handle this load, lights on the same or nearby circuits will dim or flicker briefly. This is common in older Adelaide homes and may indicate the electrical system needs upgrading to meet modern demand.
Can I fix a flickering light myself?
You can safely check that the globe is seated correctly and replace the globe if needed. Anything further, including touching wiring, opening light fittings, or replacing switches, must be done by a licensed electrician under South Australian law. Unlicensed electrical work can void your home insurance and create serious safety risks.
How do I know if my switchboard needs replacing?
Signs include ceramic fuses instead of circuit breakers, no safety switch on the board, breakers that trip frequently, or flickering and power fluctuations throughout the home. A licensed electrician can inspect your switchboard and advise whether an upgrade is needed. H. Irwin Electrical carries out switchboard assessments across the greater Adelaide area.
How much does it cost to fix flickering lights in Adelaide?
Simple fixes like replacing a dimmer switch typically cost between $80 and $180. Wiring repairs range from $120 to $300. If the issue is a faulty or undersized switchboard, costs can be $800 to over $2,000 depending on the scope of work. Getting an accurate quote starts with a proper inspection.
Wrap Up and Next Steps
Flickering lights are not always a minor annoyance. They can be the first visible sign of a wiring fault or switchboard problem that poses a real fire risk. Addressing the issue early is always cheaper and safer than waiting for something to go wrong.
If you have checked the basics and the flickering continues, or if you have spotted any of the warning signs covered in this guide, it is time to call in a professional. H. Irwin Electrical is based in Glenelg and Novar Gardens and services homes across Adelaide including Glenelg, Somerton Park, Marion, Plympton, Unley, Hyde Park, North Adelaide, Henley Beach, and many more suburbs.
Call H. Irwin Electrical today on 0432 270 757 to book an inspection or get a quote. Do not leave flickering lights uninvestigated.
