Furnaces are known for their strange noises. Normal sounds you may hear are tiny little pops or hums as the furnace runs. However, when your furnace is noisier than usual or you start hearing a noise you have never heard before, this usually indicates that there is something wrong with your furnace and it may be time to talk to your heating technician about some maintenance and repairs. Here are 3 furnace noises that you should not ignore.
1. Scraping Noises
If your furnace starts to make scraping noises, especially the sound of metal scraping metal, something is likely loose and needs to be fixed immediately. There is probably a problem with your blower wheel. If your blower wheel is broken, your furnace will not be able to properly heat your home. Any problems with your blower wheel need to be repaired by a technician.
2. Loud Pop or Bang When You Turn On Your Furnace
Here are a couple of common reasons why you may hear loud banging or popping coming from your furnace:
- Dirty furnace burners – When dirt collects on the furnace burners, this can cause a delay in ignition, which can make the gas to build up. When the burners finally ignite, you will hear a loud pop or bang. These small explosions can damage your furnace and crack your heat exchanger, which can be an expensive repair. So if you begin to hear this kind of sound, it’s a good idea to talk to a technician right away before too much damage is done.
- Expanding and contracting air ducts – If your home has metal air ducts, the ducts can expand and contract when the furnace is turned on and off. If you start hearing a popping noise, there may be some issue with your ducts that may need to be repaired such as undersized ducts, closed vents, flimsy ducts, or a clogged air filter.
3. Squealing Noises
A high-pitched squealing noise could mean a number of things, but generally, it is due to a part that needs to be replaced or fixed. Worn out parts such as a frayed blower belt or a malfunctioning blower motor can create these noises and can cause issues for your furnace that will be more major repairs. These are generally easy fixes, but it is best to get them fixed before they cause any damage to your furnace.
Talking to Your Technician About Regular Maintenance
Of course, these are not the only unusual sounds your furnace can make. Whenever you hear strange sounds from your furnace, it’s a good idea to talk to a technician. Ignoring these sounds can lead to more major repairs later on. If you begin hearing them, it’s important to make sure that they are repaired as soon as possible. Also, making sure that your technician performs regular maintenance can keep your furnace from making any strange noises in the first place.