Here is a quick explanation of some of the most common noises your HVAC system may make.

At Airpliance, sometimes we have to play “What’s that noise mean?” on the phone with our customers. While we don’t mind the guessing game, we’d like to clarify what a few common sounds that might come out of your HVAC system could mean. Understanding what is likely going on with your unit can help minimize the time you spend on the phone describing the problem to us.

Some Common Noises Explained

You might hear something that gives you cause for concern coming from your heat pump but be uncertain about what exactly is going on. Airpliance has heard it all, so we’d like to explain what some of those sounds could indicate. 

  • Buzzing. If you are sure the buzzing is coming from your A/C unit, there are a few possible causes. The compressor may be malfunctioning, the unit could be frozen due to a refrigerant leak, or it may just be a loose piece vibrating.
  • Clicking. Frequent clicking can have several possible causes, not all of them bad. Clicking when you turn the furnace on for the first time simply means that it is working. If it continues, however, it could indicate a problem with the ignition system. If the clicking comes from using the A/C, however, then it’s probably either the outside compressor or the inside air handler that’s malfunctioning. 
  • Squealing. A bad fan belt in the blower can cause a screeching sound when it needs to be replaced. Squealing may alternatively mean that the motor needs to be lubricated.
  • Rattling. Rattling or clanking noises usually mean there is something either loose or broken in the furnace’s blower.
  • Popping. If you hear popping coming from the ductwork when you first turn on the heat, that’s just the sound of cold metal expanding in the heat. If it comes from another source or doesn’t stop, call Airpliance for a professional explanation.

Don’t Fret – Call the Experts at Airpliance

Anytime you hear a strange or inexplicable noise coming from your HVAC system, call Airpliance at (863) 969-9021. We’ll help you figure out what’s happening and determine whether or not a service call is in order.