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Loud and Strange Noises Your Commercial HVAC Shouldn’t Be Making

Loud and Strange Noises Your Commercial HVAC Shouldn't Be Making

Loud and strange noises coming from your HVAC can indicate a severe problem that should be immediately inspected and fixed.

Is your commercial HVAC making loud and strange noises? This can indicate a severe problem that should be immediately inspected and fixed. The last thing you need is the commercial HVAC in your building malfunctioning, especially with the rising temperatures of the upcoming spring and summer months. Continue reading to identify five noises your commercial HVAC shouldn’t be making.

Squeaking or Squealing

Squeaking or squealing noises are common signs indicating failing components within your HVAC unit, such as motor issues or a bad or misaligned fan belt. If you’re hearing squeaking or squealing noises coming from your HVAC, you should have it inspected and serviced immediately for a motor repair, a fan belt replacement, or have your motor lubricated. Leaving these noises unchecked can cause significant damage to your commercial HVAC, causing it to malfunction, impacting your facility’s comfort levels, and resulting in expensive repairs and replacement.

Rattling or Clanging

Rattling or clanging noises are among the most common sounds HVAC owners complain about. These sounds typically indicate that your commercial HVAC has a loose or broken part or there’s something stuck inside it. So, if your HVAC is noticeably louder, it’s time to contact an HVAC technician for an inspection, repairs, or replacement immediately.


Buzzing noises is one sound that should never be ignored. Buzzing noises can indicate multiple problems for your commercial HVAC, including malfunctioning parts, vibrating loose components, obstructions, electrical problems, or refrigerant leaks. If your commercial HVAC is buzzing, have an HVAC technician look at it immediately for a proper diagnosis.


Grinding noises are often an indicator of dirt and debris accumulating at the fans’ entrance on your air conditioning (AC) unit or the blower motor on your furnace. It’s also an indicator that there’s a problem with your compressor or that dirt and small rocks are stuck and causing friction in the mechanical components of your HVAC. When left unchecked, these problems can cause your HVAC system to malfunction and break down.


Hissing noises can indicate several problems, including bad ductwork, a faulty compressor, or leaking refrigerant. If your commercial HVAC is hissing, an HVAC technician should be contacted right away to safely diagnose and fix your commercial HVAC before it becomes a hazard for your facility and its occupants.

Crockett Facilities Can Help!

Crockett Facilities Services, Inc. (CFSI) is committed to helping building owners, property managers, engineers, and facility professionals navigate the post-COVID-19 environment. We can develop a cost-effective, customized program for your building that will mitigate the potential health risks of COVID-19. Click Here to Request a Quote!

To learn more about the importance of reopening your building safely, don’t hesitate to get in touch with us at 202.600.2787 or Our PM contract customers receive priority treatment with 24/7 emergency service in Maryland, Virginia, and Washington, DC. Follow us on FacebookTwitterLinked In, and Pinterest!

This entry was posted on Friday, April 15th, 2022 at . Both comments and pings are currently closed.

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