Why Your Lights Flicker When You Turn the AC On in Your Newton, NC, Home

Have you ever noticed your lights dimming or flickering the moment your air conditioner kicks on? This common household occurrence can be unsettling, especially when you’re unsure what’s causing it.

Hickory Heating and Cooling, LLC, understands homeowners’ concerns over lights that flicker when the air conditioner turns on. Our team provides comprehensive AC maintenance services in Newton, NC, and has extensive experience addressing electrical and HVAC issues throughout the area. Let’s explore why this happens and when you should be concerned about it.
What Causes Lights To Flicker When the AC Starts?
When your air conditioner starts up, it requires significant electrical power to get the compressor running. This sudden demand creates an inrush current, which temporarily pulls electricity away from other appliances in your home. The result is a brief voltage drop that causes your lights to dim or flicker.
This phenomenon is common in older homes where outdated electrical panels can’t handle modern AC units. Newton residents often notice this effect more during hot summer months when air conditioners work harder.
Air Conditioner Causes Light Flickering: When Is It Normal?
Brief flickering during AC startup is typically normal and not a cause for alarm. Understanding common air conditioning issues can help you distinguish between normal operations and potential problems.
Typical characteristics of lights flickering when the air conditioner turns on include:
- Overall brightness decreases.
- The lights dim for only a split second.
- The flickering occurs only at startup, not continuously.
Recognizing Electrical Issues With Your AC in Newton
While brief flickering is normal, certain signs indicate more serious electrical problems. Sometimes, AC startup causes light flickering that requires professional attention when specific warning signs appear.
Problematic symptoms include lights losing nearly half their brightness, rapid on-and-off cycling, or complete temporary outages. These issues often indicate damaged wiring, overloaded circuits, or failing AC components.
Crackling or sizzling sounds accompanying the dimming suggest an overloaded circuit. This dangerous situation occurs when your AC shares a circuit with other appliances, creating a potential fire hazard. Newton homeowners should take these warning signs seriously and seek immediate professional help.
Understanding Flickering Lights During HVAC Operations
A weakened or damaged AC capacitor often causes lights to flicker when the air conditioner turns on. When it fails, your system draws additional power from other sources throughout your home.
An insufficient voltage supply can also cause flickering problems. This may stem from power grid issues or transformer problems in your Newton neighborhood. Faulty wiring represents another common cause, creating voltage drops that become more noticeable during AC startup.
How To Troubleshoot AC Electrical Flickers
Several solutions can address flickering lights in Newton homes. Installing a hard start kit reduces strain on your AC compressor during startup, minimizing voltage drops. If that doesn’t work, dedicated circuits for your AC system prevent power sharing with lights and other appliances.
Professional electrical system upgrades may be necessary for homes with outdated wiring. Voltage stabilizers regulate electrical flow throughout your home, providing long-term protection for your entire electrical system.

Expert Cooling Solutions in Newton From Hickory Heating and Cooling, LLC
Lights flickering when the air conditioner turns on isn’t always unusual. Knowing when the dimming is problematic helps homeowners identify when professional intervention is needed. Our experienced technicians can diagnose whether your flickering lights indicate regular operation or require immediate attention.

Hickory Heating and Cooling, LLC, provides comprehensive electrical and HVAC services to address these interconnected systems safely. We also offer tips to keep the AC running smoothly throughout the cooling season.
Contact our HVAC professionals today to schedule an inspection if you’re experiencing light flickering when the air conditioner turns on in your Newton, NC, home.
Frequently Asked Questions
Here are common questions Newton residents ask about AC-related electrical issues.
Is It Normal for Lights To Dim When the AC Starts?
A brief dimming of up to 5% is completely normal when your AC starts up.
What Causes Severe Light Flickering During AC Operation?
Severe flickering typically indicates overloaded circuits, damaged wiring, or a failing AC capacitor, which requires professional diagnosis.
Can I Fix AC Electrical Problems Myself?
Never attempt DIY electrical work with AC systems, as high voltages pose serious safety risks that require professional expertise.
When Should I Call a Professional About Flickering Lights?
Contact a professional immediately if you experience persistent light flickering when the air conditioner turns on, loss of brightness in your lights, or crackling sounds in your home.



