Why is My Furnace So Loud?

why is my furnace so loud?

There are several possible reasons why your furnace is making that loud noise (or noises). Here they are:

  • Dirty burners (gas furnace). Dirty burners can cause gas to build up in the pipe so that when the furnace finally comes on, it makes a loud thump.
  • Pilot light needs adjusted (gas furnace).
  • Blower belt is slipping or cracked. A high-pitched squeal is one sign that your blower belt is slipping but if no air is coming through the vents, it might be cracked.
  • Lack of lubrication. Friction between the bearings can also emit a high-pitched squeal.
  • The motor or motor bearings will ultimately fail.
  • Blower wheel is out of alignment.
  • Ductwork is contracting or expanding. This is typical in two situations: (1) the ductwork is located in an area like a basement or attic where it is exposed to higher/lower temps than the cooled/heated living space, or (2) the ductwork is sized too small to handle the flow of air.
  • What can you do?

    1. Change the air filter. If the furnace stops making that terrible noise, your furnace may be alright. Just make a note to yourself to change the filters monthly.
    2. Contact Central Carolina Air for service or maintenance, especially if your furnace is vibrating or whining. Only a HVAC specialist can determine the true cause of those noises your furnace is making and waiting too long could create the need for a brand new furnace.

    Don’t wait until your furnace is damaged beyond repair. You’ll save money with a service call and maintain comfort in your home regardless of the season.

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Planned heating & cooling maintenance by Central Carolina Air Conditioning in Greensboro will keep your home comfortable year round.  

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