As your furnace starts working harder to keep your home cozy, you might notice your lights flickering whenever the heat kicks on. While a brief dimming can sometimes happen when large appliances start up, frequent or pronounced flickering may indicate an electrical problem. If you notice this happening, contacting an electrician in Des Moines, IA is an important step toward identifying the cause and protecting your household.
Why Does the Furnace Affect Your Lights?
Your furnace uses electricity to operate components such as its blower motor, ignition system, and control board. When the furnace starts, these components create a temporary increase in electrical demand. The blower motor, in particular, draws a larger amount of current when it first starts running.
A slight, momentary dimming may occur when a motor starts, especially in older homes. However, noticeable flickering, repeated dimming, or lights that continue fluctuating throughout the heating cycle deserve attention. These symptoms can indicate that your electrical system is struggling to handle the furnace’s power requirements.
Electrical Problems That Could Be Responsible
Sometimes, the problem isn’t actually the furnace. Loose electrical connections, deteriorating wiring, or an overloaded circuit can cause lights to flicker when a major appliance starts drawing power. If your furnace and other household devices share an improperly configured circuit, the additional electrical demand may cause trouble.
Your electrical panel could also be contributing to the issue. Aging circuit breakers, loose connections within the panel, or insufficient electrical capacity can interfere with power distribution. Homes with older electrical systems are particularly vulnerable, especially if additional appliances or equipment have been installed over the years without corresponding electrical upgrades.
Could the Furnace Itself Be the Problem?
A malfunctioning furnace component can also contribute to electrical fluctuations. For example, a failing blower motor may draw excessive current as it struggles to operate. Damaged wiring, worn electrical connections, or problems with the furnace’s electrical controls can create additional strain.
If flickering begins suddenly, becomes more pronounced, or occurs alongside unusual furnace noises or inconsistent heating, get prompt repair. Both the heating equipment and the home’s electrical system may need professional attention.
Understand the Potential Safety Risks
Flickering lights aren’t something homeowners should automatically dismiss. Loose connections and damaged wiring can generate excessive heat, increasing the risk of electrical fires. Overloaded circuits and deteriorating electrical components can also create hazardous conditions.
Pay particular attention to warning signs such as buzzing outlets, burning odors, warm electrical switches, frequently tripping breakers, or lights that flicker throughout the house. If you notice smoke, sparks, or a burning smell, treat the situation as an emergency and contact emergency services if a fire may be developing. Avoid touching damaged electrical equipment.
Contact Our Expert Electrical Team Right Away
Even if your lights only flicker when the furnace starts, it’s worth having the situation investigated promptly. Our expert electrical team can inspect your electrical panel, wiring, circuits, and connections to identify potential hazards and determine whether your furnace is contributing to the problem.
Don’t wait for a minor electrical warning to become a serious household safety concern. Reach out to our team right away to schedule an inspection and get your home’s electrical system operating safely and properly throughout the winter season.
At Dalton Plumbing, Heating, Cooling, Electric and Fireplaces, Inc., your comfort is our promise! Contact us today for help from an electrician in Des Moines, IA!