When your furnace turns on, you’ll usually notice a small click at the location of your thermostat. The furnace will start to run, producing a low hum. You may not even hear this if the appliance is in your basement or otherwise tucked away from your living space. Once air starts to move through your furnace and out through your vents and registers, the noise can increase a bit. However, you should never hear any kind of buzzing, banging, or rattling sounds as your furnace runs. Here are some key signs to watch out for that indicate you have a problem that requires professional assistance.
Loud Banging Noises
If you hear occasional banging noises coming from your furnace when it is running, this can indicate that there is a problem with the ignition. These noises could also be caused by an issue with your ductwork. Both of these are issues that you need to have a professional address. If you have cracks or gaps in your ducting, this can lead to strain on your HVAC system, pests in your ductwork, and poor indoor air quality.
Screeching or Squealing Noises
A loud screeching or squealing noise can indicate that your blower motor is malfunctioning. There may also be damage to a belt that is causing friction when it’s moving.
Rattling Sounds
Rattling usually indicates that there is a part that is loose, causing it to move when your furnace is running.
Humming or Buzzing
Humming or buzzing sounds should never be ignored, as they often indicate a problem with the electrical components of your furnace. This could pose a risk of a fire or electrocution, so it’s best to have our team come to your home to inspect the problem. We recommend turning off your HVAC system until we arrive. Also, watch out for additional signs of electrical problems, like the smell of something burning when your furnace is running.
Loud Clicking
While it’s normal to hear a click when your furnace turns on, ongoing clicking may indicate a problem with ignition or the control board. Incorrect signals may be transmitted that should be fixed promptly to prevent further damage from occurring.
If you’re located in the Farmington, ME area and need assistance with diagnosing strange furnace noises, you can count on our team of knowledgeable and experienced professionals. Give A-1 Plumbing and Heating a call, and we’ll quickly diagnose and take care of your furnace problem.
