Flickering Lights in Your Thornleigh Home
Lights that flicker, dim, or randomly brighten are telling you something in the circuit isn't holding steady.
Sometimes that's minor. Sometimes it isn't.
Call (02) 9139 8011 and one of our electricians can talk you through it, often same or next day.
Why Your Lights Are Flickering
Flickering happens when the voltage reaching a light fluctuates instead of staying constant. That can come from the globe itself, the switch, the fitting, or further back at the switchboard.
None of these show up looking the same to the naked eye, which is exactly why guessing rarely gets it right the first time.
A single flickering light usually points to something local, like a loose globe or a failing dimmer. Multiple lights flickering together, especially when a heavy appliance switches on, points to something back at the switchboard or main circuit instead.
Timing tells you a lot. A flicker that only happens the moment a kettle or heater switches on is a voltage-drop symptom playing out through your lights, not a fault with the lights themselves.
When a Flicker Is Urgent
Isolated, occasional flickering from one fitting with no heat or smell is a lower-priority fault. It can typically wait for a scheduled visit.
Flickering that comes with a burning smell, visible sparking, or a warm switch or fitting is different. That combination means stop using that light and call us straight away.
Lights that flicker across the whole house, particularly alongside other symptoms like a warm switchboard, point to a bigger fault and should be treated as urgent.
If in doubt, treat it as the more serious version. A quick phone call to us costs nothing, and we can usually tell from a short description whether it needs a same-week visit or an urgent one.
Six Causes, From Common to Rare
Flickering has a wide range of possible sources.
- A loose or failing globe, especially with older bayonet fittings
- A worn dimmer switch not rated for the type of globe installed
- A loose terminal anywhere from the switch through to the switchboard itself
- Voltage fluctuation from an appliance drawing heavy current on the same circuit
- An overloaded circuit carrying more load than it's designed for
- Ageing wiring losing its ability to hold a steady connection
Some of these are quick fixes. A worn globe or dimmer takes minutes.
Others, particularly circuit and wiring faults, take a proper diagnostic visit before anyone can say honestly what's involved.
Is It the Fitting or the House?
Older bayonet-fitting downlights and pendant points, common in Thornleigh's pre-war cottages and bungalows, wear out at the fitting itself far more often than newer bayonet-free LED fixtures do.
If flickering is confined to one or two of these older fittings, that's usually the fitting's own age rather than a sign of anything wrong with the house's wiring generally.
Widespread flickering across a newer renovation or a unit near the station tells a different story. That pattern usually means the circuit itself, not any individual fitting.
Knowing which one you're dealing with saves a wasted trip to the hardware store buying globes that were never the problem.
What To Do Before We Arrive
- Track how it's behaving. Whether it's a single fixture or several, and whether it's constant or comes and goes, tells us a lot before we even arrive.
- Check if it's the globe. Swap it for a known-good one if that's simple and safe to do.
- Turn off that circuit if the flickering is severe or comes with any smell or heat.
- Call (02) 9139 8011 if more than one light is affected or it's getting worse.
How We Fix a Flickering Light
We test in a set order: the globe and fitting first, then the switch, then the circuit and connections back at the board. That stops us swapping parts on a guess.
Once we've found the actual cause, we repair or replace it, whether that's a dimmer rated for the wrong load, a loose terminal, or a circuit that's simply carrying too much.
Swapping parts without confirming the cause first is how flickering gets "fixed" three times in a row. We'd rather take an extra ten minutes testing than have you calling us back next month.
We confirm the fix holds under real load before packing up, and any notifiable work comes with a Certificate of Compliance.
You'll get a written price before we start, based on what we actually find rather than a guess over the phone.
Preventing the Next Flicker
Most flickering can be headed off before it becomes a repeat problem.
- Match dimmers to globe type, since LED and old-style globes need different dimmer ratings
- Give heavy appliances their own circuit instead of sharing one with the lighting
- Have ageing wiring checked if flickering has become a recurring pattern
- Upgrade an old switchboard if flickering coincides with other symptoms like tripping
- Get a whole-house check if flickering has appeared in more than one room without an obvious trigger
Our light installation page covers fitting and dimmer work if that turns out to be the fix your home needs. Getting the right dimmer matched to the right globe the first time avoids years of intermittent flicker nobody bothers chasing down.
Other Faults We Chase Down
Flickering that worsens over weeks is often connected to overloaded power points or a breaker that's started tripping too, since a strained circuit tends to throw up more than one symptom at once.
These faults sit alongside our regular work in Wahroonga, Normanhurst and Hornsby.
Call Us Today, We Will Sort It
Flickering lights are usually simple to diagnose once someone's actually looking at the circuit, not guessing over the phone.
Call (02) 9139 8011 and we'll get it sorted properly the first time, often same or next day.
Common questions
Your Flickering Lights FAQs
The questions we hear most once the flickering starts, and the honest answers to each.
Can flickering lights cause a fire?
In some cases, yes. Flickering caused by a loose connection or arcing generates heat, and that heat is a genuine fire risk if left unaddressed. Flickering from a failing globe or dimmer is a lower-risk version of the same symptom, though it's still worth having checked rather than living with it indefinitely.
How much does it cost to fix flickering lights?
It depends on the cause. A globe or dimmer swap is a small job, while a wiring fault or switchboard issue costs more to trace and repair. You'll always get a written quote before we start.
Can I keep using the lights while I wait for someone to come out?
If it's isolated to one fitting and there's no smell or heat, yes, though switching that light off is the safer option. If several lights flicker together or you notice warmth anywhere, turn that circuit off instead.
How do you find what's actually causing the flickering?
We test the circuit, the switch, the fitting and the connection at the switchboard, in that order, rather than assuming it's the globe. Flickering has several possible sources and they don't all look the same.
How long does it take to fix flickering lights?
A single fitting or switch issue is usually a short visit. A circuit-wide fault or switchboard connection takes longer to trace, and we'll tell you which one it looks like before starting.
Are flickering lights an emergency?
Not usually, unless it comes with heat, a burning smell, or visible sparking at a switch or fitting. Isolated flickering with none of those signs can wait for a scheduled visit.