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?
- 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.
- 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.