Why is my furnace making weird noises?

But if you hear a loud humming or buzzing sound coming from your furnace, it usually means your furnace has an electrical problem. The most common electrical issues that cause a humming or buzzing sound include: A failing blower motor capacitor. An aging or unlubricated blower motor.

What does a bad furnace sound like?

There are a variety of problems that can cause your furnace to produce loud noises. Types of noises such as scraping, banging, whistling, and popping may be a sign of a loose part, cracked heat exchanger, or dirty gas burners.

Do furnace makes noise when starting up?

Homeowners often notice a popping sound when the furnace begins a cycle. This is due to warm air that hits the cold metal of the ducts, which causes expansion and produces that noise. When the popping noise is louder, your gas furnace’s burners may be dirty.

Why does my furnace rattle when it starts up?

A bang or rattling sound from your furnace could mean that you have a cracked heat exchanger, which is the biggest cause of carbon monoxide leaks. A rattling sound before the blower comes on almost always means a cracked heat exchanger.

When should I worry about my furnace noise?

In most cases, it is wise to call a service technician. A pinging or popping sound is most likely coming from one of the ducts and is not really something to worry about. If you hear an odd vibrating noise or whining, it may indicate a problem with your furnace and a technician really needs to check it out.

Why does my furnace sound like a freight train?

Furnace Sounds Like a Train Whistle
Air leaks: Whistling noises are often caused by air under pressure.

What does a bad blower motor sound like?

A defective blower motor will make a continuous sound noticeable by the passengers in the vehicle. It can manifest as a knocking, whirring, clunking, vibrating, squealing, or whining noise that persists until the blower motor is replaced.

How long do furnaces usually last?

15 to 20 years

A well-maintained furnace can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend its life even longer.

Why is my furnace making a boom sound?

Did you hear a loud boom coming from your furnace? You are most likely hearing a delayed ignition. When too much gas builds up in the combustion chamber and the ignition is delayed, your furnace experiences a small gas explosion. This can be caused by low gas pressure, clogged burners, and dirty equipment.

What are the signs of a cracked heat exchanger?

Six Signs Your Furnace Heat Exchanger May be Cracked

  • Strange smells. A malfunctioning heat exchanger will often create an unpleasant and strong odor that smells similar to formaldehyde.
  • Soot Build-up. …
  • Corrosion & Cracks. …
  • Change in the flame appearance. …
  • Audible Sounds. …
  • Presence of Carbon Monoxide.

Should I hear my furnace?

It’s normal for your furnace to make some noise. For instance, a dull hum is to be expected. However, louder noises might spell trouble for your heating unit’s components. Remember to turn off your furnace if it makes any alarming sounds and leave the repair job to a professional.

How do I make my furnace sound quieter?

How to Quiet a Noisy Furnace Blower: 9 Easy Ways

  1. Adjust Furnace Fan Speed.
  2. Clean Furnace Blower Fan.
  3. Replace Furnace Blower Bearings.
  4. Check Motor Mount for Loose Connections.
  5. Tighten the Set Screw.
  6. Change The Belt Drive.
  7. Try Sound Insulation Solutions.
  8. Replace The Motor or Fan Blade.

Can my furnace explode?

The short answer is yes, it is possible for your furnace to explode. But it is highly unlikely especially with the build of modern furnaces, which include high safety standards to decrease the risk of an explosion.

Can a furnace start on fire?

The furnace has internal components that have a strict tolerance to certain levels of heat. If this is exceeded, these components are at risk from setting on fire. As an example: A very high internal furnace temperature could make the soot in the walls of the heat exchanger combustible, and a fire could start.

Should I see fire in my furnace?

If it’s in tip-top shape, the flame visible through the opening in your furnace should be blue/blueish green depending on whether your furnace is running on propane or natural gas. A blue steady blue flame in the burner compartment is a sign your furnace is producing complete combustion, which is ideal.

How do I know if my furnace is working properly?

How to Tell if Your Gas Furnace is Operating Properly

  1. Quiet. Some furnace noises are made during normal operation. …
  2. Odorless. After sitting for a long period without running, you may notice a burning dust or dirt smell during your furnace’s first few cycles. …
  3. In good condition. …
  4. Clean. …
  5. Operating efficiently.

What does orange flame in my furnace mean?

When flames are yellow or orange it is a sign of dirt build up in the burner, or other possible issues. An unstable flickering yellow or orange flame is an indication that the furnace is not producing an appropriate mixture of gas and oxygen. Ignoring this sign can lead to a large gas leak and lead to disaster.