Why is my furnace making a whining noise?

A whining (or grinding, screeching, banging) sound coming from a furnace is usually the result of a moving part beginning to fail – most often: The ventor motor, or. Circulating fan motor.

When should I worry about my furnace noise?

Some noises coming from your furnace are normal and indicate your furnace is working correctly. However loud or funny noises could indicate a need for heating repair. If you think the unit sounds funny, or just doesn’t seem to sound like it usually does, you’re probably right!

Why does it sound like my furnace is whistling?

A whistling noise caused by the furnace means that air is escaping somewhere in the system. It may a new or rebuilt fan that is forcing air through the ducts with more force, or it could be a loose connection in the ducts. Even a loose register cover can create a soft whistling noise if the air pressure is high.

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.

What does a bad furnace bearing sound like?

A bad bearing can generate noises that range from a high-pitch squealing noise to a low-frequency thumping sound. If you suspect bad blower bearings, you should contact a qualified technician to diagnose.

Why does my furnace sound like a lawn mower?

To troubleshoot, start by checking and replacing air filters, cleaning the dust buildup from, and inspecting blower belts. All of these can cause your blower to be working harder, thus a louder sound from the physical blower motor. You can also look into replacing older parts such as the fan bearings or an old motor.

Can my 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 I stop my furnace from whistling?

To solve the problem, clean the vent off to allow for better airflow. Blocked or Shut Off Supply Vent: Just like a blocked return vent can cause whistling, a closed or blocked supply vent can cause a whistling noise.

What does a bad furnace blower motor sound like?

Loud clanking or scraping, classified as a metal-against-metal sound signals a serious problem with the furnace’s blower wheel. Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing.

Can a furnace explode?

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.