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8 Effective Ways Of How To Quiet A Noisy Furnace Blower

A furnace blower is a tool that keeps your home warm. It becomes a must to have this tool during winter. But the problem begins when the furnace blower starts to make noises that are loud and unusual. Due to several reasons, a furnace blower makes buzzing, rumbling, and whistling sounds which are noisy. 

Is your furnace blower too loud? Are you looking for solutions on how to quiet a noisy furnace blower? Then you have come to the right place. In this article, we have mentioned ways that you can follow to reduce the sound of your noisy furnace blower.

What causes a furnace blower to become so loud?

You might have a question in mind ‘Why is my furnace blower so loud?’ There are several reasons that cause a furnace blower to become noisy. One of them is rattling noises that occur because of the loose or moving parts inside the blower. Another reason might be the rumbling noise that occurs due to fuel ignition.

One reason might be also the banging noise that is caused because of the duct, vent, and filter area. Humming noise might be another reason why a furnace blower becomes loud. This noise is generally produced because of a fan or transformer. Another reason is the squealing noise that is caused because the furnace belt is loosened.

8 Easy Ways of How To Quiet A Noisy Furnace Blower

1. Adjust the Fan Speed

As mentioned before, that fan is the reason for the humming noise. Check the fan properly. There might be some dirt or dust that needs to be cleaned. Also, there is a chance that the fan is running at an excessive speed which is unnecessary. 

The furnace blower is always installed according to your house’s requirements. This helps your house to have better airflow. But often your blower’s fan runs at a high speed than required. Because of that, the pressure of the air reaches maximum and then the noise occurs.

In that case, just reduce the speed to the level that is required and also check the airflow. If it suits you then just set the furnace blower and you are good to go.

2. Find and Replace the Loose Parts

Loose parts can lead your furnace blower to be a noisy one. As mentioned before, loose parts are the reason for the rattling noise. It’s wise to replace a loose part if you don’t have the ability to buy a new blower fan. You have just to check if there are any loose parts in your furnace blower and after finding them just replace them instantly.

You can also use duct tape on any loose parts. Because sometimes squeaking noise can be caused by a loose belt inside the blower. The best you can do is that if your blower has been used for a long time just purchase a new belt 

3. Clean Furnace Blower Fan

A furnace is normally kept in the basement of a house. So it is normal to have so much buildup dust in it. If you don’t keep it on regular maintenance there is a chance that there will be excessive dust inside the furnace and will block the blower fan.

The dust particles on the fan can be the reason for external air resistance which will lead to producing noise inside the blower. So cleaning the blower fan can help you massively in reducing the noise of the furnace blower.

4. Use Different Air Filters

Furnace air filters are basically used to prevent dust and unwanted particles from entering inside the furnace blower. The more unwanted particles the filter will catch the harder it will be for the blower to pull the air. Blocked filters can lead your blower fan to run faster and as a result, the blower will become noisy.

If you have been using the filter for so long and didn’t change it for a while then do so as fast as possible. It will help you to reduce the noise of the blower as there will be less stress on your blower’s fan. 

Always use filters with minimum efficiency reporting values which are rated between 7 to 12. These kinds of filters help to flow the air without any stress. But avoid filters that are rated 13 or higher than that.

5. Add Return Air ducts

If you notice that there is noise reduction inside the air filter then there is a chance that your blower has insufficient return air. It might cause a vacuum on the part which intakes instead of pushing the air through the system. There is a difference in high pressure between the input and output sides that cause loud noise.

If this is the problem then the noise can be reduced easily. All you need to do is to add additional air ducts inside the furnace blower. If you can’t replace it on your own then take the help to a professional.

6. Check the Blower Motor

Inadequate bearings might also cause the blower motor to grind or wail like a banshee. Begin by inspecting the blower motor housing for evidence of abnormal wear and tear, such as metal particles.

Turn on the blower motor fan to ensure that it is moving freely and without resistance. If there is a lot of debris and dust, it is a good idea to lubricate all bearings using WD-40 or 3-in-1 Oil. The combination of cleaning and oil should take care of the majority of noise issues. If there is a bad bearing just replace it instantly.

7. Fasten the Motor Using Bolts

If you are still facing the same problem after following all the steps mentioned above then the problem is somewhere else. Look at the condition of the motor of the furnace blower. The existing rubber mount might be missing or worn out. Fasten the motor using bolts and also install rubber mounts that will help in the reduction of the noise.

Make sure that the fastener isn’t broken. A damaged fastener can cause the furnace blower to become loud. If you can’t fasten the motor on your own then just call a professional to do the work for you.

8. Call in professional help

Sometimes you get to know about the problem. But some problems are so complicated that they can’t be solved on their own. And sometimes you don’t have the tools and experiences to solve the problem. Or maybe the problem you have are thinking might not be the actual problem.

In these kinds of situations, it is wise to call for professional help. Just tell them your problem and they will help you to solve it. It will also save you a lot of time.

Frequently Asked Questions (FAQ)

1. How do I know when my furnace needs replaced?

Answer: Constant sounds and rattles are often too much for basic repairs, necessitating a complete furnace replacement. If you discover higher-than-usual utility costs that cannot be explained by usage, you may need to replace your furnace. Furthermore, as your furnace ages, you may find yourself paying for frequent repairs.

2. How Much Noise Does A Normal Furnace Blower Produce?

Answer: As you are aware, there are numerous varieties of blowers on the market. As a result, the amount of typical noise produced by the blower is likewise determined by its capacity. A normal blower, on the other hand, does not create more than 48dB of noise.

3. How Much Does It Cost To Quiet A Noisy Furnace Blower?

Answer: Making a noisy furnace blower quiet is dependent on the underlying issue. How are you going to have it fixed? That is why, if the problem is significant and you require professional assistance, you will need to boost your budget. However, it will cost you between $250 and $750 in total.

Final Words

A furnace blower is an essential device and you must take proper care of it. Otherwise, it will become noisy and can become irritating day by day. If you really want to reduce the noise of the blower then you can follow the steps mentioned in this article. 

Following these steps will not make your ones the quietest furnace blower. But it will definitely help you to get rid of the noise as much as possible.

Brian Pierce

Brian Pierce is a professional gardener who has vast experience in gardening and home decorating. Being cultivating his skills, he has been to many home and garden related seminars of typical fashion. So, now he has decided to share his years of knowledge, experience, opinions, tips, and above all his hobby on the internet. Find him on Twitter here. Happy Reading!

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