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Why Do My Lights Flicker When My Furnace Turns On?


The winter months are rapidly approaching, and it’s important to ensure your furnace is working properly before the cold sets in. If your electricity flickers when the heat comes on in your home, it could be a sign of a larger issue. Contact an HVAC professional to inspect your furnace and find out what the problem could be so you can have it repaired before the temperatures drop. Keep reading for a list of the most common causes of lights flickering when the furnace turns on.

  • Circuit Overload – The home’s electrical panel is full of circuits, and many of them supply power to multiple electrical items a time. So when your furnace turns on, any light fixtures that are running on the same circuit as the heater could flicker because their electricity supply is lowered for that brief second. If your lights are constantly flickering, it could signify a circuit overload, and the breaker could trip. To mend this issue, you would need to ensure that your heater has its own circuit and breaker. Contact GAC to inspect your furnace and check for a circuit overload.
  • Exposed Wires – If any wire are exposed on the furnace’s power cord, this can cause arcing between different wires. Arcing is an electrical short between wires that cause electricity to skip from one wire to another and can cause fires. All wire should be fully encapsulated with sheathing. If you notice any exposed wires, be sure to contact an electrician right away to prevent any serious damages.
  • Distribution Panel – Every home has a maximum amount of voltage that can be safely supplied to the structure via the distribution panel. When you add too many circuit breakers or major appliances to your home, you could overload the panel. Your furnace could be using the last bit of electricity available in your home, causing your lights to flicker.

To ensure your safety and comfort, it’s important to contact an HVAC expert if you ever have any concerns about the condition of your furnace. It benefits you in the long-run to have your furnace properly inspected, maintained and repaired throughout the year. Contact GAC Services for all your furnace repairs and HVAC questions.

Quality Furnace Repairs in Maryland

For reliable furnace repairs in Maryland, Contact the HVAC experts at GAC Services. We have the knowledge and experience to get any furnace issues resolved in no time. Make sure your furnace is working properly before the winter months so your home stays safe and comfortable throughout the seasons. We also offer emergency furnace repair services, so if your furnace breaks down in the middle of the night, call us right away—301-926-3253.

Contact GAC Services online to learn more about our furnace services, or schedule an appointment today!

Need Service? Schedule a service with us today!

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