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Why is my HVAC system making strange noises?

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There are a number of sounds that your HVAC can make that are indicative of potential problems. Here’s what some of the most common sounds your HVAC system can make and what they may be trying to tell you.

  • Squealing or screeching—These strange sounds may indicate an issue with the blower motor. Issues may include a defective or broken belt or motor bearing issues.
  • Rattles, clanking, and banging—These sounds are generally indicative of a problematic blower assembly or motor. These sounds are generated when an internal part becomes loose, breaks, or disconnects completely. You should turn the power off to the entire system and schedule repair services as soon as possible.

Any sort of strange sound that comes from your HVAC system isn’t normal. It’s important to schedule repair services to prevent further—and costlier—damage to your system.

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