The Solution for Lights Flickering When AC Comes On

Nov 14, 2023


Welcome to Proflo HVAC, the top-of-the-line contractor specializing in various HVAC services for both residential and commercial spaces. In this comprehensive article, we will address a common concern faced by many homeowners and business owners alike: lights flickering when the AC comes on. We will delve into the root causes of this issue and provide you with feasible solutions to eliminate this nuisance. With our expertise and knowledge in the field, we assure you that Proflo HVAC will help you overcome this problem effectively.

Understanding the Issue

Lights flickering when the AC unit turns on can be a frustrating situation. It not only causes inconvenience but also raises concerns about the electrical system's stability. Many factors can contribute to this problem, such as:

  • Electrical system overload
  • Voltage fluctuations
  • Loose or faulty electrical connections
  • Undersized wiring

Let's explore each of these factors in detail to gain a better understanding of the issue.

Electrical System Overload

An overloaded electrical system can trigger lights to flicker when the AC unit starts. This occurs when the electrical load exceeds the capacity of the circuit or the home's electrical panel. To determine if an overloaded system is the underlying cause, it is crucial to consult an expert like Proflo HVAC.

Voltage Fluctuations

Voltage fluctuations, also known as power surges or drops, can lead to lights flickering momentarily when the AC unit kicks in. These fluctuations can be caused by various factors, including power grid issues, faulty wiring, or heavy electrical appliance consumption. An in-depth evaluation by our knowledgeable professionals can help identify the specific cause and devise an appropriate solution.

Loose or Faulty Electrical Connections

Loose or faulty electrical connections can disrupt the smooth flow of electricity, resulting in lights flickering. Over time, connections can become loose due to natural wear and tear, leading to electrical arcing or poor contact. Our experienced technicians at Proflo HVAC possess the skills to identify and rectify such connections, ensuring optimal electrical performance.

Undersized Wiring

In some cases, lights flickering when the AC comes on can be attributed to undersized wiring. If the electrical wiring is not adequately sized to accommodate the load of the system, it can cause voltage drops and in turn, flickering lights. Our team at Proflo HVAC can assess the wiring's capacity and replace it with the appropriate gauge to alleviate the problem.

Solutions Offered by Proflo HVAC

At Proflo HVAC, we understand the frustration caused by lights flickering when the AC turns on. To help you overcome this issue, we offer a range of highly effective solutions tailored to your specific needs:

Electrical System Upgrades

If an overloaded electrical system is identified as the cause, our team will assess the existing electrical panel's capacity and recommend a suitable upgrade. By installing a higher capacity electrical panel, we can ensure that your electrical system can handle the load from the AC unit without any flickering or interruptions.

Voltage Stabilization

To combat voltage fluctuations, Proflo HVAC offers voltage stabilization solutions. By installing voltage stabilizers, surge protectors, or power conditioners, we can regulate the electrical supply and absorb any sudden spikes or drops, ensuring stable power for your AC unit and preventing lights from flickering.

Electrical Connection Check-Up

Our experienced technicians will conduct a thorough inspection of your electrical connections. Any loose or faulty connections will be properly tightened or replaced to restore the optimal flow of electricity. This professional approach will eliminate lights flickering and ensure the safety of your electrical system.

Wiring Evaluation and Upgrade

In cases where undersized wiring is the culprit, we will evaluate the existing wiring and determine the correct gauge required to handle the load efficiently. Our skilled electricians will replace the undersized wiring with the appropriate size, effectively resolving the issue of lights flickering when the AC comes on.


Dealing with lights flickering when the AC unit comes on is not only an annoyance but also a potential indication of underlying electrical issues. As experts in the HVAC industry, Proflo HVAC strongly advocates for seeking professional assistance to effectively address this problem. By undertaking a thorough diagnosis of the root causes, our team of skilled professionals can provide appropriate solutions tailored to your specific situation.

Don't let flickering lights disrupt your comfort and compromise the electrical stability of your property. Contact Proflo HVAC today to schedule a consultation and say goodbye to lights flickering when the AC comes on for good.

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