If the lights in every room dip or flicker at the same moment, it’s not the globes. When the whole house does it together, the cause sits further up the line: the main connection, the switchboard, or the street supply. Here is how to tell which, and when it’s a safety issue.
When every light in the house flickers or dims at the same moment, the cause isn’t the globes. It’s somewhere every circuit shares: the main connection, the neutral, the switchboard or the street supply. A brief dip as the air conditioner starts can be normal; flicker that’s frequent, deep or comes with heat, buzzing, or a tingle from a tap is not. Ask a neighbour first, then have the switchboard and supply tested through electrical fault finding.
“Treat it as urgent if flickering comes with any of these”
- A switchboard or meter box that’s warm, buzzing or crackling, or smells hot.
- Lights that go noticeably brighter, then dimmer, or appliances that start acting strangely.
- A tingle or shock from a tap, sink or metal fitting. Ausgrid treats this as an emergency: call 000 if anyone is hurt, then Ausgrid on 13 13 88.
- For anything on your side of the meter, call 0450 406 450, 24/7. Don’t open the switchboard or meter box.
One Light Flickering vs the Whole House: Why the Difference Matters
Where the flicker happens tells you where to look. The wider it spreads, the closer the cause is to the supply.
Common Causes When Every Room Flickers Together
A Loose Main Connection or Neutral (Urgent)
All your circuits share the same main cables, the main switch, and the neutral connection. If any of those work loose or corrode, every light in the house feels it. The tell-tale sign is a flicker that isn’t tied to any one appliance, sometimes with lights glowing brighter than usual for a moment. A failing neutral can also put voltage where it shouldn’t be, which is why a tingle from a tap is so serious. This one isn’t a wait-and-see fault.
Big Loads Starting Up: Aircon, Oven, Pool Pump
A split system, oven, pool pump, or well pump draws a surge of current as it starts. A short, slight dip in the lights at that moment can be normal. A deep dip, a dip that lasts, or one that’s getting worse points to a loose connection, an overloaded circuit or a supply that’s struggling. Note which appliance sets it off; that’s the first thing an electrician will ask.
Street Supply Issues on the Ausgrid Network
Faults in the street, a struggling transformer, or a damaged service line can all show up as flicker inside your house. Storms and hot afternoons, when the whole street runs its air conditioners, are common times. Ausgrid lists flickering lights among the issues it wants reported, alongside outages and partial power loss.
Incompatible Dimmers or LED Drivers
If only the dimmed lights flicker, the cause is almost always a dimmer that doesn’t suit the LEDs, not the supply. That’s a different fix, covered in this guide to swapping halogen downlights for LEDs.
Is It Ausgrid or Is It Your House? How to Check
- Ask a neighbour whether their lights flicker or dim at the same times as yours.
- Check Ausgrid’s outage map for faults or planned work in your street.
- Notice the pattern: does it happen only when one appliance starts, at random, or at certain times of day?
- If you’ve had an SMS or email from Ausgrid about a neutral integrity alert from your smart meter, keep the meter accessible and expect a technician to visit.
If the neighbours have it too, report it to Ausgrid on 13 13 88. If it’s only your house, the fault is most likely on your side of the meter.
What Ausgrid Looks After vs What You Own
Ausgrid maintains the network in the street. Beyond its connection point, the electrical equipment on your property is the owner’s responsibility, and repairs there need a licensed electrical contractor. Ausgrid’s neutral integrity checks say the same: Ausgrid fixes faults in its network, and problems in your own installation are for a licensed electrician.
When Flickering Is Dangerous (Warm Switchboard, Burning Smell, Buzzing)
Flicker on its own is a warning. Flicker with heat, noise, or a smell is a fault that’s already doing damage. A warm or buzzing switchboard, a hot or crackling meter box, scorch marks around a breaker, or lights flaring bright before they dim all point to a connection that’s arcing or a neutral that’s failing.
Don’t keep living with it. If the switchboard is cool and dry, you can turn the main switch off. If it’s hot, wet or sparking, stay away from it. Then call an emergency electrician. If anyone has had a shock or tingle, Ausgrid’s emergency advice is to call 000 if it’s life-threatening and report it to Ausgrid on 13 13 88.
“What Not to Do”
- Don’t ignore a tingle from a tap or metal fitting, even a faint one.
- Don’t open the switchboard or meter box to look for a loose wire.
- Don’t keep running the air conditioner or other big loads if they make the whole house dip hard.
- Don’t assume it’s Ausgrid without asking a neighbour or checking the outage map.
“Flickering with a hot or buzzing switchboard?”24/7 for urgent faults · Licensed electrician · Newcastle, Lake Macquarie and Maitland. That’s urgent. I’ll test the main connections and neutral and make it safe, any hour.
What an Electrician Checks First
Whole-house flicker is tracked down from the supply inwards:
- The pattern: when it happens, how long it lasts, and what was running.
- Voltage at the switchboard, with and without the big appliances running, to see how far it drops.
- The main switch, meter connections, and neutral for looseness, heat marks, or corrosion.
- Each circuit’s connections, if the flicker turns out to be limited to some rooms.
- The result explained: whether the fault is yours to fix or Ausgrid’s, and what happens next.
If part of the house drops out completely rather than flickering, that points to a related set of causes, covered in half the house has no power.
Fixing Flicker After New Lights or Fans Were Installed
Sometimes flicker starts the week after new work. One Metford enquiry described fan lights flickering in sync after a recent install. When new fittings flicker together, the usual causes are a fan controller or dimmer that doesn’t suit the LED light kit, a shared or loose connection made during the install, or new fittings that simply aren’t compatible with the existing switching.
It’s worth fixing promptly, because a loose connection gets worse, not better. If the original installer can’t sort it, any licensed electrician can test the circuit and match the controls to the fittings. For new lighting done properly from the start, see light installation.
“Fault finding for Newcastle, Lake Macquarie and Maitland homes” 24/7 for urgent faults · Licensed electrician · Newcastle, Lake Macquarie and Maitland. Whole-house flicker, lights dimming when the aircon starts, and flicker after new lights or fans. I’ll find whether it’s your house or the supply, and fix what’s on your side.
Frequently Asked Questions
Why do all my lights flicker at the same time?
Because the cause is something every circuit shares: the main connection, the neutral, the switchboard or the street supply. Check whether the neighbours have it too, then have the switchboard and supply tested.
Why do my lights dim when the air conditioner turns on?
A big appliance draws a rush of current as it starts. A brief, slight dip can be normal, but a deep or lasting dip points to a loose connection, an overloaded circuit or a weak supply, and should be tested.
Should I call Ausgrid or an electrician about flickering lights?
If the neighbours’ lights flicker too, report it to Ausgrid on 13 13 88. If it’s only your house, call an electrician. If anyone has had a tingle or shock from a tap, treat it as an emergency and call Ausgrid straight away.
Can flickering lights cause a fire?
The flicker itself doesn’t, but the loose or arcing connection causing it can. Flicker with a warm switchboard, buzzing, or a burning smell needs an electrician that day.
Why are my lights flickering after new LED downlights were installed?
Usually the dimmer or controller doesn’t suit the new LEDs, or brands are mixed on one dimmer. If every light in the house flickers, not just the new ones, look at the supply and main connections instead.
Find Out Which Side of the Meter It’s On
Whole-house flicker always has a cause further up the line than the globes. Ask a neighbour, check Ausgrid’s map, and watch for heat, buzzing, or tingles. If it’s only your home in Newcastle, Lake Macquarie or Maitland, call 0450 406 450 to have it tested.
