Why Do My Lights Flicker? 9 Common Reasons and How to Fix Them
Flickering lights can be annoying — and sometimes even a warning sign of a bigger electrical problem. Whether it’s a single light or multiple fixtures throughout your home, understanding the root cause is crucial for safety and peace of mind.
Let’s dive into the top reasons your lights might flicker and how to fix them.
1. Loose Light Bulbs
One of the most common causes is a loose bulb. If the bulb isn’t screwed in securely, it may flicker due to inconsistent electrical contact. This can happen with any type of bulb, from incandescent to LED.
Solution: Turn off the light, let the bulb cool, and tighten it securely. If it still flickers, try replacing the bulb. For LEDs, ensure they’re high-quality bulbs from reputable brands to avoid flickering due to poor manufacturing.
2. Wrong Type of Bulb
Are you using LED bulbs with dimmer switches? Not all LEDs are dimmer-compatible, causing flickering issues. Some older dimmer switches were designed for incandescent bulbs and may not handle low-wattage LEDs properly.
Solution: Ensure you’re using “dimmable” LED bulbs and compatible dimmer switches. If your dimmer is old, consider upgrading to an LED-compatible model for smoother operation.
3. Faulty Light Switches
A worn-out or defective switch can disrupt the power flow, making lights flicker. This is especially common with toggle switches that have been used for many years or those installed incorrectly.
Solution: Toggle the switch and see if the flicker stops. If not, replace the switch or consult an electrician. If you notice sparks or hear crackling sounds when you flip the switch, stop using it immediately and call a professional.
4. Voltage Fluctuations
If you notice lights dimming when large appliances (like a fridge or air conditioner) turn on, you might have voltage fluctuations. This happens when high-power devices draw more current than your home’s wiring can handle.
Solution: Check if the issue happens consistently. If yes, call an electrician to inspect and stabilize your electrical panel. They may recommend adding a dedicated circuit for power-hungry appliances or upgrading your service panel.
5. Overloaded Circuits
Too many devices running on one circuit can cause flickering due to electrical overload. This is common in older homes with fewer circuits or modern homes with heavy appliance usage.
Solution: Unplug unnecessary devices or consider installing a dedicated circuit for high-power appliances. If you frequently experience tripped breakers along with flickering lights, your electrical system may be outdated and need an upgrade.
6. Loose Electrical Wiring
Loose or damaged wiring is a serious fire hazard and can cause persistent flickering. This can occur in switches, outlets, light fixtures, or even the main electrical panel. Over time, wires can loosen due to vibration, poor installation, or wear and tear.
Solution: If you suspect faulty wiring (especially if you notice burning smells or buzzing sounds), call an electrician immediately for safety. Never attempt to fix internal wiring yourself unless you’re a licensed professional.
7. Utility Service Issues
Sometimes, the issue is outside your home. Power grid problems or faulty transformers can lead to flickering lights, especially if multiple houses in your area experience the same issue.
Solution: Ask your neighbors if they’re experiencing similar issues. If they are, contact your power company. Utility companies can inspect transformers and power lines to resolve larger grid issues.
8. Faulty Circuit Breaker
A malfunctioning breaker may cause intermittent power flow, leading to flickering. Breakers are designed to trip when circuits overload, but old or faulty ones may not function correctly, allowing power surges instead.
Solution: If resetting the breaker doesn’t solve the problem, get a professional to inspect and replace it if necessary. An electrician can also check for underlying wiring issues contributing to breaker failure.
9. Electrical Panel Problems
Outdated or overloaded electrical panels may struggle to supply steady power, causing flickering. If your panel is old or frequently trips, it may not handle your home’s power demands, especially with modern appliances.
Solution: If your panel is over 20 years old or frequently trips, it’s time for an upgrade. A licensed electrician can assess whether a new panel or additional circuits are needed to ensure consistent power delivery.
When to Call Our Professional Electrician
While some flickering issues are quick DIY fixes, others — especially those involving wiring or the electrical panel — require professional expertise. If you notice:
- Persistent flickering across multiple rooms
- Burning smells or buzzing sounds
- Warm outlets or switches
- Circuit breakers frequently tripping
It’s time to call a licensed electrician to ensure your home’s safety.
Ignoring flickering lights may seem harmless, but in reality, they can indicate dangerous electrical problems that could lead to fires or damage your appliances.
Preventing Future Flickering Issues
Prevention is always better than repair. Here are a few proactive steps you can take to keep your lights steady and bright:
- Use high-quality light bulbs — Cheaper bulbs are more prone to flickering.
- Upgrade outdated wiring — If you live in an older home, consider rewiring to meet modern electrical standards.
- Schedule regular electrical inspections — A licensed electrician can spot potential problems before they become hazards.
- Avoid overloading circuits — Spread your appliances across multiple circuits to balance the load.
Flickering lights aren’t just a minor inconvenience — they could be a sign of a more serious electrical issue. By identifying the cause and applying the right fix, you can restore steady, safe lighting to your home.
Need help with flickering lights? Contact Insight Electrical for expert repairs. Our Newcastle electrician will diagnose the issue and fix it fast.
