Question about lights and your HVAC

My Lights Flicker When I Use My HVAC. Should I be Concerned?

Lots of things in your home rely on electricity—from charging your electronics to keeping the temperature inside where you want it. That’s why it’s infuriating when electricity in our homes doesn’t work the way we anticipate. For many homeowners, this stress can come to a head when lights flicker after their HVAC system starts to operate.

The question remains: Do dimming or flickering lights at the beginning of HVAC cycles signify a serious electrical problem? It depends.

When are dimming or flickering lights considered common?

If you’re noticing dimming that lasts for a fraction of a second when your HVAC begins, it likely isn’t something to be worried about.

While it might not feel like it, your home has a certain amount of electricity it can use at any given time. Large appliances—like your HVAC system—need a significant amount of electricity to start up. When those appliances turn on, they take a larger amount of the available electricity. This means the other appliances in your home, like your lights, don’t have as much power available to them.

If this is the only issue you are facing, your lights should dim for less than a second and quickly return to full brightness. If you’re done with the flickering, schedule an appointment with Air Houston Mechanical LLC. We’ll review your system and see if an equipment upgrade or circuit changes can solve the problem.

When should I be concerned about flickering lights?

Flickering lights can also point to a more serious matter. Don’t investigate yourself. The problem could be unsafe for you or your home. Call a professional if you see:

  • Lights that continue to flicker. The normal flickering that happens when there isn’t enough power to support all appliances in your home should last a fraction of a second. If your lights continue to flicker on and off when you start your HVAC system—or continually at any other time—you could have a challenge with your wiring.
  • Lights that dim considerably. When you experience normal dimming, the effect is enough that you notice a small, brief change. If the intensity of your lights abruptly drops considerably, you may have something wrong with the outdoor compressor on your air conditioner.
  • A circuit breaker trip when you switch on your HVAC. Circuit breakers are a critical part of your home’s electrical system. When they trip and shut off power to a part of your space (powered by a specific circuit), they are attempting to protect you from a problem with your circuit. While it might be that you have too many appliances on the same circuit, it’s smart to bring a professional in to make sure there isn’t a more serious problem.

Any time your HVAC system and lights don’t work together, it’s not a bad idea to call a technician in to take a look. The team at Air Houston Mechanical LLC is here to help. When you need us, you can give us a call at 832-777-1521 or schedule an appointment online. We’ll make sure everything is in order so you can feel safe in your home.

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