Home Improvement

Furnace Service: 6 Sounds Your Furnace Shouldn’t Make

The furnace should make some noises for you to know that it’s working, but there are some noises that scream trouble. Here are some of the noises that the furnace shouldn’t make as given by furnace service professionals:


Chirping noises are one of the most common noises that you will find in most furnaces. If you hear bird-like sounds coming from your unit, there is definitely something wrong with your unit.

Chirping noises can mean many things: the wheel might be misaligned, the bearings might be worn out, the motor mounts might be loose, the mounting plates might have been warped, among many other things.

Unless you are highly experienced at fixing furnace problems, you should hire a professional who will help you with the inspection of the furnace and fixing of the problematic areas.

Clanking noises

Clanking noises often come about due to a loose/broken belt. The belt ends up hitting the other parts of the furnace. In addition to the loose belt causing the noise problems, it can also bring about many other problems that can be expensive to fix.

When you hear clanking noises, you shouldn’t ignore them—you should fix them as soon as possible in order to protect your unit.


Clicking sounds are the most benign sounds, until they get very loud. When you experience extremely loud clicking noises, it means that there are loose bolts on the furnace cabinet. You also might be having a problem with the heat exchanger.

A cracked heat exchanger is dangerous as carbon monoxide can leak into the house, putting your life and that of your loved ones in danger.

When you hear the sound even once, you should contact a professional who will go through the entire appliance and determine the source of the noise.

Booming sounds

Booming sounds, especially at night are indicative of expanding ductwork. The sounds might mean that the ductwork is improperly sized and cannot supply or return adequate amounts of air.

As you might have guessed, this compromises the comfort and operating costs of the furnace.

Furnace experts report that the “booms” can also come about due to dirty furnace burners, but these aren’t dangerous.

If you have defective gas valves, you can experience the sounds. The defective gas valves also lead to ignition problems that can have dire consequences on your health and that of your loved ones.

Scraping noises

There is nothing exciting about scraping noises. When you have the noises coming from your furnace, they can mean many things. One of the things they mean is that the blower wheel is either broken or loose.  In the worst case scenario, they can mean that the motor mount is broken, which can cause the blower assembly to drop.

When you experience the noises, you should contact a repair professional as soon as possible to identify the source of the problem and fix it.

Squealing noises

When you experience high-pitched whines, you have a reason to worry and you should contact a repair professional as soon as possible. Squealing noises are as a result of frayed or loose blower belt, malfunctioning blower motor, or bearings that require oiling.

For you to fix the problem, you should hire a heating service repair huntington professional to maintain the appliance. If the bearings are dry, the professional should oil them.

If there is a blockage in the duct, undersized ductwork, or crushed duct, the professional should give it a look and fix the problematic area.  When hiring the heating contractors, ensure that they are reputable and highly experienced in their work. The last thing you want is hiring a professional whom you will have an awful experience with.

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