HVAC System Sounds That Could Indicate Issues

No matter how old your HVAC system is, it can develop issues. Certain noises can even be a signal that the system is failing and requires professional attention. As a leading provider of installation and maintenance for HVAC systems in Mount Laurel and nearby regions, we’ve listed some sounds that could be signs of some issues.

Clicking Sounds

Clicking sounds are relatively normal when an HVAC unit is switched on or off. However, if you hear repeated clicking noises coming from the outside compressor or the control panel, one of the relays may be defective. Electrical controls may also be what’s causing the relay to fail.

Thumping, Banging, or Rattling Noises

These kinds of sounds can indicate motor or blower assembly problems. Rattling is usually a sign that a system component has come loose. These types of issues need to be repaired before any parts break or disconnect entirely. A loud banging noise when the blower is running could be a sign that something has been disconnected or is broken. Rattling sounds can mean loose motor bearings.

Screeching or Squealing

When the blower motor makes squealing noises, this can be an indication of a motor bearing problem or a bad belt. Belts are generally an inexpensive repair. However, they should be replaced before they break. When they break, your blower will cease to turn.

Rattling from Outside Fan Units and Compressors

Fans should not rattle when compressor units are turned on. These sounds often indicate a failing motor or loose hardware. The louder the sound is, the more serious the problem may be. If the noise sounds like a scream, the compressor could be failing. A humming noise could indicate a bad motor or failing start capacitor. A squealing noise when the unit first starts up is perfectly normal, but if the sound persists, you should hire an HVAC professional to inspect the system.

For additional information or to schedule residential or commercial HVAC repairs in Burlington County, contact our team today!


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