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Why Your HVAC Makes Weird Noises During A Thunderstorm

Alabama is no stranger to severe summer storms. These thunderstorms, often accompanied by heavy rain, lightning, and strong winds, can create a host of problems for homeowners. One such issue that may arise is your HVAC system making strange noises. If your HVAC starts to produce unusual sounds during a thunderstorm, it’s important to understand the potential causes and how to address them.

A few reasons why your HVAC system might make strange noises during a thunderstorm

  • Power surges and electrical Issues
    Thunderstorms often bring lightning strikes, which can cause power surges. These sudden spikes in electrical power can affect your HVAC system’s components, leading to noises such as buzzing, humming, or even loud bangs.
  • Debris in the outdoor unit
    High winds can blow leaves, branches, and other debris into the outdoor unit of your HVAC system. This debris can obstruct the fan and other moving parts, causing grinding or rattling noises.
  • Water damage
    Heavy rains can lead to water infiltrating the HVAC system, especially if the outdoor unit is not adequately protected. Water entering the system can cause electrical shorts or corrosion, leading to unusual noises.
  • Loose or damaged parts
    The combination of strong winds and vibrations from thunder can loosen screws, bolts, or other parts of the HVAC system. Loose parts can cause banging, clanking, or rattling noises during operation.
  • Changes in air pressure
    Thunderstorms can cause rapid changes in air pressure. These fluctuations can affect the performance of your HVAC system, sometimes resulting in whistling or whooshing sounds.

HVAC maintenance tips

While you can’t prevent thunderstorms or severe weather, you can take steps to ensure your HVAC system is well-maintained. Here are a few ways to maintain your HVAC system during the summer and throughout the year.

  • Regular maintenance
    Don’t forget to schedule regular maintenance for your HVAC system, especially before the storm season. This can help identify and fix potential issues before they become problematic. Polar Bear Services provides an HVAC maintenance plan that includes two service visits per year for a yearly fee of $150 per unit.
  • Post-storm inspections
    After a severe storm, inspect your HVAC system for any signs of damage. This proactive approach can prevent minor issues from escalating.
  • Install surge protectors
    Consider installing surge protectors to safeguard your HVAC system from electrical spikes caused by lightning.
  • Keep the area clear
    Keep the area around your outdoor unit clear of debris and vegetation to ensure optimal airflow and prevent blockages.

Polar Bear Services is your one-stop solution for all things HVAC!

Severe summer thunderstorms frequently happen in Alabama and can impact your HVAC system. It’s important to know what might cause unusual noises and take steps to prevent damage and maintain the system’s functionality.

If you encounter persistent or concerning noises, it’s always best to consult with a professional HVAC specialist to diagnose and address the issue promptly. Offering the best HVAC services in Huntsville, Greater Birmingham, and Gulf Shores, as well as communities throughout Jefferson, Shelby, Madison, Baldwin, and Calhoun counties, our locally owned and family-operated company is ready to help property owners install, repair, and maintain their HVAC systems!