Kimbro Air
Kimbro Air
HendersonvilleTN 37075
 (615) 824-8098

What is your Furnace Telling You?

What is your Furnace Telling You?

As the nights get colder your furnace is likely to run off and on all evening and throughout the night. You may become accustomed to the sound of it running quietly in the background, but if you hear unusual sounds when your furnace is running, it may be time to call your heating and cooling experts. While random noises, such as a few creaks and bumps may not mean you need emergency service, there are some sounds that do. Be on the alert for these telltale sounds.

Metallic Scraping

If you suddenly hear a loud scraping noise that sounds like metal against metal, it probably is. This send-shivers-down-your-spine sound is usually from the blower wheel hitting the side of the casing. This can happen if the blower wheel is loose, the mounts break or the blower wheel is broken. This sound may be continuous or may be repetitive.

Banging or Booming

If you hear a loud bang or boom every time the furnace starts up, it's time to call your HVAC dealer. This often indicates that your furnace ignition is delayed and gases are building up before it lights. The sound is often accompanied by an odor or fuel or exhaust. This can be caused by faulty burners or a buildup of dirt and grime on the burners. A professional cleaning generally takes care of the problem.

If you notice rattling sounds coming from your furnace, take it as a sign that something is amiss. It may be a sign that you have worn parts in either the motor or the fan.

Loud Pops

This sound is similar to the booming or banging from delayed ignition. But the sound actually comes from the ducts as they expand and contract with the heat. This may be a signal that your ductwork is too small, that vents are closed or that the air filters are clogged. Listen carefully when you hear popping to determine whether it is coming from the furnace or the ducts.

Squealing

This sound can be annoying and should be viewed as a warning that you may soon need work. Squealing or whining typically means that the belt is loose or worn or the shaft bearings need replacing. It may also indicate the blower motor is failing.

Rattling

If you notice rattling sounds coming from your furnace, take it as a sign that something is amiss. It may be a sign that you have worn parts in either the motor or the fan. If the sound continues or gets louder, call your heating and cooling company to have it checked out. Under some circumstances it could be a sign of system failure.

Being on the alert for unusual sounds coming from your furnace will give you a heads up before a major issue arises. If you notice these, or other unusual sounds, contact Kimbro right away. We are available for 24-hour emergency service.