The colder weather means that furnaces will be on and in overdrive. If your furnace is making loud noises, noises you aren’t used to, it’s important that you pinpoint where that sound is coming from in hopes of solving the issue. Royal Heating & Air knows that noise can indicate a much more serious problem or there could even be damage to your unit. There are many different parts that could create those noises, each part creates a different noise. Noises coming from your furnace should never be ignored. The best HVAC company at the Lake of the Ozarks has a breakdown of the different noises and what you could do to fix it.
Loud Furnace Causes
Blower Motor
If your furnace makes a loud screeching or rattling sound when you turn it on, then the bearings in the blower motor, or even the blower motor itself, could be to blame. The blower motor is what forces the warm air out of the furnace and into the air ducts. The blower motor needs routine lubrication and often a specific kind to upkeep function over time. If this is not done, the fan could seize up which can cause a loud noise and an expensive repair bill. It’s best to contact a professional technician for a proper inspection, oiling, and any other maintenance.
Loose or Damaged Blower Belt
If your furnace has a belt-driven motor, you might hear a squealing sound if the blower belt becomes loose. The squealing can also be caused from shaft bearings and other moving parts that have become dry. During your tune-up, a professional technician lubricates moving furnace parts in order to keep your furnace running smoothly all winter long.
Blower Wheel
Loud clanking that sounds like metal-against-metal, is the sign of a serious problem with the furnace’s blower wheel. The blower fan has most likely become loose and is creating the sound by hitting against the blower house casing. This sound needs to be addressed right away. When you hear this sound, it’s important you turn off the furnace immediately and contact a professional HVAC technician from a complete inspection.
Dirty Burners
If you hear a loud bang when you turn your furnace on, chances are your furnace has dirty burners that need to be cleaned. Dirty burners are dangerous because they can delay the ignition. When the ignition is delayed, gas builds up and “explodes” when the ignition is turned on. Annual inspections, as well as cleanings, will help prevent this from happening.
The other cause of a loud bang that is felt throughout the home is caused by an unbalanced air-to-fuel ration. In order to work properly, your furnace needs a proper mixture of air and gas. If there’s too much air and not enough gas, gas can build up resulting in a loud booming sound.
A thud sound could also be the metal air ducts expanding and contracting as the temperature changes. This is completely normal and does not indicate any damage to the furnace.
Common Furnace Noises
- Metal against metal
- Loud scraping
- Screeching
- Rattling
- Humming
- Boom or bang
- Rumbling
You should never ignore any of these noises coming from your furnace. Contact Royal Heating & Air as soon as you notice any of those noises. It’s important to schedule your annual furnace maintenance at the beginning of every heating season. This will help keep your furnace safe and running smoothly all year long. If your furnace still needs its cold weather maintenance, give the best HVAC company at the Lake of the Ozarks a call!
Royal Heating & Air - "The King of Comfort"
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