Why Are My Lights Flickering When the AC Turns On?

Is Flickering Normal When the Air Conditioner Starts?

In some cases, a slight flicker is completely normal. When large appliances like air conditioners start up, they draw a surge of electricity. This momentary voltage drop can cause nearby lights to dim or flicker. However, if the flickering is severe, lasts more than a second, or happens frequently, it’s worth investigating.

Common Causes of Flickering Lights

1. Voltage Drop from High Start-Up Current

Air conditioners, especially ducted or older models, use a large amount of current to start up. This sudden demand can cause a brief voltage dip in your electrical system, leading to lights flickering throughout the home.

2. Loose or Failing Connections

Loose wiring in your switchboard, light fittings, or power points can amplify flickering and may become a serious safety hazard. If you notice crackling sounds, burning smells, or discoloured outlets, call a licensed electrician immediately.

3. Overloaded Circuits

If your air conditioner and lights are on the same circuit, that circuit may be overloaded. This can cause not only flickering but long-term strain on your home’s wiring. An electrician can evaluate your setup and suggest dedicated circuits for major appliances.

4. Outdated or Undersized Switchboard

Older homes with outdated switchboards may struggle to keep up with modern appliance demands. If your switchboard hasn’t been upgraded in 20+ years, it’s time to have it assessed by a qualified electrician.

5. Problems with the Air Conditioner Unit

Sometimes the issue lies within the AC unit itself. A failing capacitor, motor, or internal wiring fault can cause irregular power draw, which then causes your lights to flicker.

When Should You Call an Electrician?

If your lights are flickering frequently, lasting longer than a second, or worsening over time, it’s time to call in a licensed electrician. Not only can this prevent further electrical issues, but it also ensures the safety of your home and family.

How East Coast Sparkies Can Help

At East Coast Sparkies, our team of experienced electricians can assess your home’s electrical system, inspect your switchboard, and ensure your air conditioning is properly integrated without overloading your circuits. We provide honest advice, high-quality workmanship, and fast service.

Preventing Flickering Lights in the Future

• Install dedicated circuits for large appliances
• Upgrade your switchboard if it’s outdated
• Have regular safety checks by a licensed electrician
• Ensure your air conditioner is well-maintained

Still Wondering Why Your Lights Flicker When the AC Turns On?

Don’t leave it to chance. Whether it’s a small fix or a bigger issue, the team at East Coast Sparkies is ready to help. Book a visit with a trusted electrician today and keep your home running smoothly and safely.