Why Do My Lights Flicker When I Turn On Appliances?
Have you noticed your lights flickering when the washing machine starts, the fridge motor switches on or someone uses the microwave? It’s a common issue in Brisbane homes, but understanding why it happens is important.
Sometimes, a brief change in brightness is caused by the extra electrical current an appliance needs when starting. However, frequent flickering, significant dimming or lights that continue flashing can indicate an underlying electrical problem.
At North Lakes & Surrounds Electrical, we help homeowners across North Brisbane and the Moreton Bay Region identify and resolve electrical faults, including flickering lights, voltage issues and problems with household wiring.
Here’s what might be causing your lights to flicker when appliances turn on and when it’s time to have your electrical system inspected.
Why Do Lights Flicker When Appliances Turn On?
When an electrical appliance starts operating, it draws electricity from your home’s electrical supply. Some appliances, particularly those containing motors or compressors, require a higher current for a short period while starting.
This sudden demand can create a temporary voltage drop, sometimes causing nearby lights to dim momentarily.
A small, occasional change in brightness may not indicate a serious problem. However, noticeable or repeated flickering can suggest that the wiring, electrical connections or supply require attention.
Understanding which appliances trigger the problem can help your electrician identify the underlying cause.
1. Appliances Drawing High Starting Current
Some household appliances draw considerably more electricity when starting than during normal operation.
Common examples include:
- Refrigerators and freezers
- Washing machines
- Dishwashers
- Pool pumps
- Electric motors and workshop equipment
When these appliances start, the temporary increase in electrical demand can cause a slight voltage drop.
If your lights briefly dim and immediately return to normal, this may be related to the appliance’s starting current.
However, if the lights dim significantly, remain dim or flicker repeatedly, a licensed electrician should investigate.
2. Overloaded Electrical Circuits
Another possible reason for flickering lights is excessive electrical demand on an individual circuit.
Modern Brisbane households often use several electrical appliances simultaneously, including computers, televisions, kitchen appliances and laundry equipment.
Where circuits are unsuitable for the electrical demands placed on them, voltage drops or other electrical problems may become noticeable.
Overloaded circuits can also cause protective devices to trip, interrupting the electricity supply.
It’s important to understand that installing additional power points does not automatically increase the amount of electricity a circuit can safely supply.
If you’re experiencing electrical problems when several appliances operate together, our power point installation and electrical upgrade services can help you explore suitable solutions.
3. Loose or Faulty Electrical Connections
Loose electrical connections are another possible cause of flickering lights and should never be ignored.
Over time, electrical connections may deteriorate due to age, previous installation issues, heat or other factors.
A loose connection can create an unstable electrical supply, particularly when an appliance increases the electrical demand.
Unlike minor voltage fluctuations caused by appliance startup, faulty connections can generate excessive heat and potentially create a fire hazard.
Warning signs can include:
- Lights flickering across several rooms
- Unusual buzzing or crackling sounds
- Burning smells near switches or outlets
- Discoloured power points or switch plates
- Lights becoming unexpectedly brighter or dimmer
If you notice these symptoms, avoid using affected equipment and arrange an electrical assessment promptly. If there are sparks, smoke or signs of fire, keep clear and contact emergency services.
4. Problems With Your Switchboard
Your home’s electrical switchboard distributes electricity to different circuits throughout the property.
An outdated, damaged or unsuitable switchboard may contribute to electrical performance problems, particularly where the installation has changed over time.
For example, an older property may have undergone renovations or had additional electrical appliances installed without a complete assessment of its electrical infrastructure.
However, flickering lights do not automatically mean your switchboard needs replacing. The cause could also be wiring, connections, the appliance itself or the incoming electricity supply.
A licensed electrician can inspect the system and recommend repairs or upgrades where necessary.
Learn more about our switchboard upgrades in North Brisbane.
5. Faulty or Incompatible LED Lighting
LED lighting is widely used in modern Brisbane homes because of its energy efficiency and long operating life.
However, some LED lights are sensitive to changes in voltage or incompatible with certain dimmer switches.
When appliances start and create minor voltage fluctuations, incompatible LED drivers or dimming equipment may make the changes more noticeable.
In some cases, the issue may be limited to one particular light fitting rather than the home’s wider electrical installation.
An electrician can assess whether the problem relates to the LED driver, dimmer compatibility, electrical connections or another issue.
Our residential lighting services include lighting installations, repairs and upgrades throughout North Brisbane.
Why Do My Lights Flicker When the Washing Machine Runs?
Washing machines contain motors and other electrical components that operate at different stages of the washing cycle.
When the motor starts or changes operating speed, it may briefly increase electrical demand.
If your lights flicker every time the washing machine enters its spin cycle, the issue could involve voltage fluctuations, the appliance or the electrical circuit supplying it.
Frequent flickering should be investigated, particularly if accompanied by circuit breakers tripping or unusual electrical noises.
Why Do My Lights Dim When the Fridge Turns On?
Refrigerators use compressors that cycle on and off to maintain the required temperature.
When the compressor starts, it can draw additional electrical current for a brief period.
This may explain why nearby lights occasionally dim when your fridge switches on.
However, if the dimming becomes more noticeable, affects multiple rooms or is accompanied by other electrical problems, arranging a professional inspection is recommended.
Is It Dangerous When Lights Flicker?
Not every flickering light indicates an immediate electrical danger, but persistent or unexplained flickering should not be dismissed.
A brief change in brightness when an appliance starts is different from lights that flicker continuously or become unexpectedly brighter.
More concerning symptoms include burning smells, sparking, buzzing, electric shocks, damaged outlets and repeated circuit interruptions.
These can indicate potentially hazardous electrical faults requiring prompt professional attention.
Never remove switchboard covers, open electrical fittings or attempt to repair fixed electrical wiring yourself. In Queensland, this work must be performed by an appropriately licensed electrician.
What Should You Do If Your Lights Keep Flickering?
If your lights flicker whenever certain appliances operate, there are a few safe observations you can make before arranging an inspection.
- Identify the appliance: Notice whether the problem happens when the fridge, washing machine or another appliance starts.
- Check which rooms are affected: Determine whether one light flickers or several rooms experience the same problem.
- Observe the frequency: Note whether the flickering occurs occasionally or every time the appliance operates.
- Watch for warning signs: Burning smells, buzzing, sparks or damaged outlets require immediate attention.
- Contact a licensed electrician: Arrange professional fault finding if the issue continues or worsens.
Do not repeatedly operate equipment that appears faulty just to reproduce the problem. Avoid using the affected appliance if you suspect an electrical fault.
Professional Electrical Fault Finding in North Brisbane
At North Lakes & Surrounds Electrical, our licensed electricians diagnose electrical problems in residential properties throughout North Brisbane and the Moreton Bay Region.
Electrical fault finding may involve inspecting wiring, checking connections, assessing circuit loads and measuring voltage under appropriate conditions.
Our team can investigate whether the issue originates from an appliance, lighting circuit, switchboard or another part of the electrical installation.
We provide a range of residential electrical services across North Brisbane, including fault finding, electrical repairs, lighting upgrades and switchboard assessments.
Frequently Asked Questions
Is it normal for lights to dim when an appliance turns on?
A very brief, minor change in brightness can occur when an appliance starts and draws additional current. However, significant or frequent dimming should be assessed by a licensed electrician.
Can a faulty appliance cause lights to flicker?
Yes. A faulty appliance may draw abnormal current or create electrical disturbances. If flickering consistently occurs when using one appliance, stop using it if a fault is suspected and arrange an appropriate inspection.
Can an overloaded circuit cause flickering lights?
Excessive electrical demand can contribute to voltage drops and other electrical problems. An electrician can assess circuit loading and determine whether repairs or circuit upgrades are required.
Do flickering lights mean I need a new switchboard?
Not necessarily. Flickering can result from loose connections, incompatible lighting equipment, appliances or supply voltage issues. A professional inspection can establish whether a switchboard upgrade is needed.
Should I call an electrician if lights flicker throughout my house?
Yes. Flickering affecting several rooms can indicate a problem with shared wiring, the switchboard or electricity supply. Arrange a prompt electrical assessment, particularly if the problem is worsening.
Book an Electrical Inspection in North Brisbane
Are your lights flickering when the washing machine runs, the fridge starts or other household appliances switch on?
North Lakes & Surrounds Electrical provides professional electrical fault finding and repairs across North Lakes, Mango Hill, Griffin, Kallangur, Murrumba Downs, Narangba, Redcliffe, Caboolture and surrounding suburbs.
Our licensed electricians can investigate the cause of flickering lights and recommend appropriate repairs to help keep your electrical system safe and reliable.
Call North Lakes & Surrounds Electrical on (07) 3053 3118 or contact our team to book an electrical inspection.
