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When does a furnace blower need to be replaced?

By John Kim |

When does a furnace blower need to be replaced?

The blower motor is the component in a central HVAC system that consumes the most energy. If you already have a variable speed blower motor in your furnace, and the motor is not clogged with debris, the motor may be wearing down and approaching end of life.

What happens if your furnace blower fan fails?

The blower fan pushes air over the heat exchanger and circulates it around your home. If the blower motor fails then the furnace might cycle on and off and won’t function properly. If the blower wheel is noisy or grinds when it spins then its best to replace it.

Why is my furnace so loud when I turn it on?

Blower Motor. 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.

What causes a bad fuse on a furnace?

Bad blower motor. A failing blower motor can also cause the blown fuse. The strain causes the motor to draw too much power, causing the short. If this is the problem, your technician will need to replace the motor.

The blower motor is the component in a central HVAC system that consumes the most energy. If you already have a variable speed blower motor in your furnace, and the motor is not clogged with debris, the motor may be wearing down and approaching end of life.

Why does my furnace blower keep going bad?

Like other components in your HVAC system, the blower motor can wear down over time. Some of the reasons a blower motor might fail are overheating, and excessive moisture. When dust, dirt, and debris build up, it can cause the windings and bearings to burn up more quickly.

Why does my Furnace Fan make a noise when it starts?

From time to time, you may notice that the furnace blower motor is making a noise when it starts. While they are annoying, they can be a sign of a greater issue. If you hear thumping, screeching, or humming, it could be a sign that the fan blower is either damaged or worn down.

How does a furnace blower work in a HVAC system?

How Furnace Blower Motors Work The blower motor in your HVAC system blows the heated or cooled air through the vents in your home. The air that is heated by your furnace or cooled by your AC unit moves through your home until each room reaches its desired temperature. There are two main types of drives in furnace blower motors: