For example, a smaller duct system could contribute to less air circulating through your home. This means that your new furnace is noisier because the larger size of its components allows you to receive more airflow.
If it's the sound of the actual furnace you're hearing, you could add some sound deadening panels to the ceiling of your furnace room. If it's the ducts vibrating and making a noise, you could have them re-hung with acoustic isolators. Spray foam may help but it's not meant to be exposed.
You'll probably have to remove an access plate to get at the ports. If the blower has grease cups instead of oil ports, remove the screw caps that cover the cups and fill the cups with bearing lubricant, which is available at automotive and hardware stores. When you lube the motor, you should also check the belts.
On a normal day, your home's furnace might make a little noise as it starts up, when it's turning on, and then when it turns off. You can always expect to hear some noise from the furnace. The thing about this noise is that it should never be disruptive.
If your furnace is making an obnoxious noise, it's likely because the furnace blower motor is turning on and off as part of normal heating furnace cycles. Make sure your thermostat is set properly to the desired temperature and off when you don't need heat (like overnight).
One of the more common problems in a blower motor is the bearings. Bearings surround the motor shaft, allowing it to run smoothly at high RPM with almost no friction. When the bearings go bad, the motor may make a grinding or screeching sound, or not run at all because of the friction preventing the motor from turning.
Until recently, noisy furnaces were accepted as the norm. High noise levels were associated with heating your home. But today's technology allows you to choose a furnace that is not only highly efficient but also exceptionally quiet.
Modern furnace systems operate quietly. They have two- or multi-stage motors, which don't make as much noise when they start and stop. Modern furnace systems also feature sound dampening equipment. You'll barely hear a hum when your new furnace performs a heating cycle.
In order to maintain a comfortable home environment and reduce energy consumption, it's important to ensure your HVAC system is running at an optimal noise level. Ideally any appliance or HVAC system should never create sound louder than 60 dB inside your home.
7. Grinding, Scraping, or Clanking. If your furnace sounds like a train grinding and scraping away on tracks, then you probably have an issue with the blower wheel.
Trane is widely regarded as one of the top brands when it comes to quiet operation. Their Trane XV20i is a standout model known for its extremely low noise levels. Equipped with variable-speed technology, this furnace adjusts its speed to maintain consistent indoor temperatures, which helps to minimize noise.
All-in-all, your air conditioning unit may be buzzing due to loose parts. Some components that can become detached and loose include fan blades, refrigerant piping, and other internal parts. In some cases, the loose part can be adjusted and tightened to fix the problem.
Vaseline: you can use vaseline for all sorts of applications. It is a great lubricant for metal parts such as air installation, but it is also regularly used for installing PVC parts. Note: contrary to ball bearer grease, vaseline does become liquid at higher temperatures (40 - 60°C), causing it to drip.
You can leave the bearings for a few minutes/and hour/overnight if you're not in a rush - it'll help all the old grease and dirt come off.
The lubricant must be chosen appropriately: some of the selection criteria derive directly from what has been said: you can easily deduce the fact that the use of impromptu lubricants (olive oil, paraffin oil, nautical grease, WD40, etc.) will probably not lead to results you want, or at least won't allow you to get ...
The buildup of dirt and debris: The blower wheel and fan blades may get covered in dirt and other particles over time, creating an imbalance that produces loud noises. Your blower wheel component within your furnace will need to be cleaned by a professional technician.
You have a couple of options for lubricating the shaft and bearings of the blower motor. Spray lubricant, available at hardware stores, is sprayed into the oil ports. You may also inject the lubricant into the ports using a grease gun. Squeeze two or three drops of oil into each port.
Running the Fan Continuously
This offers benefits for your home such as: Improved air circulation throughout your living spaces. Enhanced indoor air quality by filtering air continuously. Reduced motor stress by minimizing frequent starts and stops.
Add Insulation. Insulate. HVAC units make noise. A good workaround is installing insulating foam material (likely a thin, heat-resistant piece of melamine foam) inside the furnace next to the blower intake.
Normal Furnace Noises
Sometimes there is a little bit of a pop or click as the furnace fires up, then the heating system settles into a dull hum as it runs. Think of it like the click you hear when you turn on the burner on a gas stove.
Blocked or undersized air ducts, closed vents, or a clogged air filter can force the furnace to work harder, leading to a loud noise similar to a jet engine. Solution: Inspect and clean or replace air filters and ensure all vents are open and unobstructed.