A rumbling furnace noise can indicate a serious problem with your motor bearings, gas burners, or pilot light. A house-shaking rumbling on the other hand could be due to unburnt fuel in your combustion chamber that burns even after your furnace shuts off.

Why does my furnace roar?

Dirty gas burners are the most common culprits of a rumbling furnace. Over time, soot and dirt build up on the burners, which restricts the airflow needed for combustion. As a result, you’ll often hear a deep, rumbling sound when your furnace kicks on and while it runs.

Why does my house make noises when the heat is on?





The ducts that send warm air throughout your home are made of thin metal. The metal can expand when heated and will contract as it cools down after the furnace cycles off. As the metal ducts expand, they typically make a banging or booming noise.

When should I worry about my furnace noise?

A majority of furnaces will produce a low humming noise while they are operating. If this noise is becoming noticeably loud, this is a signal of a severe problem with your blower fan or capacitor. To prevent damage to your fan, it’s important to call a licensed technician to inspect and repair the blower motor.

What does a bad furnace sound like?

Noise #4: Humming or buzzing

A dull hum is normal while your furnace is running. But if you hear a loud humming or buzzing sound coming from your furnace, it usually means your furnace has an electrical problem.

Why is my furnace blower so loud?





If you are hearing loud screeching and rattling noises when you turn your furnace on, the bearings in the blower motor or the blower motor itself could be to blame. Your blower motor forces the warm air out of your furnace and through the air ducts in your home.

How do I reduce the noise from my furnace?

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.

How do you fix a noisy furnace vent?

High static pressure makes airflow more audible

  1. Adjust the fan speed. Your blower or furnace fan should be set to deliver the proper airflow per ton. …
  2. Add ductwork. …
  3. Add a bypass duct. …
  4. Add or expand grilles and registers. …
  5. Replace existing registers and grilles with high velocity models.

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.

Should gas furnace make noise?

A gas furnace makes a clicking noise when a heat cycle starts and stops, which is normal. If clicking occurs repeatedly throughout the heating cycle, it’s usually a compressor or control panel issue.

Can a furnace explode?

The modern gas furnace is much safer than electric space heaters, and furnaces are built to high safety standards. Although it is possible for a gas furnace to either catch fire or explode, it’s highly unlikely. If there is a danger of this happening, the furnace will usually simply shut off—as it’s designed to.

How do you know if your furnace is going to explode?



Here are five warning signs that your furnace is going to explode.

  • There is rumbling, high-pitched, grinding furnace noise. …
  • Your carbon monoxide detector has gone off. …
  • You smell fuel. …
  • Your furnace heater isn’t turning on, or it’s getting unbearably hot. …
  • notice a discolored pilot light.

Can my furnace catch on fire?

Yes, a furnace can catch fire.

Your furnace’s air filter is blocked. Your furnace’s gas pressure is too high. There is a crack in your furnace’s heat exchanger.

Why does my furnace shake?



It’s most likely that the cause of vibration is an unsecured blower fan or motor. Sometimes, the blower motor can shake itself loose from the mounts that hold it in place, creating a loud vibrating sound as it runs. Contact a furnace expert to reconnect the fan or motor to the mounts that keep it in place.

Why do I hear a vibrating sound in my house?

Three issues can create humming or buzzing from an outlet or switch: a loose wire, an overloaded wire, or an improperly grounded wire. Each of these situations is a fire hazard, so you’ll need to involve a professional electrician. Light fixtures.

Why does my house sound like it’s vibrating?

If one of your outlets is loose and not properly secure, it may produce a vibrating sound. Or, if some of your wiring is loose or working harder than it’s supposed to, either situation may cause vibrations. Check all the wire connections to ensure there are no breaks or faulty wires.