Why is my furnace making a loud vibrating noise?
Why is my furnace making a loud vibrating noise?
- Adjust the fan speed. Your blower or furnace fan should be set to deliver the proper airflow per ton.
- Add ductwork.
- Add a bypass duct.
- Add or expand grilles and registers.
- Replace existing registers and grilles with high velocity models.
What causes a furnace to make knocking sounds?
Why is My Furnace Making Noise?
- Whistling Noise. A whistling noise means there is a problem with the duct. ...
- Rattling and Vibration. If your furnace is rattling or vibrating then we have some simple solutions for you.
- Motor Noise. ...
- Banging When the Furnace Turns On. ...
- Oil-Canning Ductwork. ...
- Ignition Roll-Out. ...
- Banging or Squeaking When You Walk on the Floor. ...
Why is the furnace making a loud humming noise?
- A loose transformer box. The furnace is equipped with a transformer that converts incoming voltage to the voltage required by the system. ...
- Bad capacitor. The furnace’s capacitor stores electricity to help its motor start up when a heating cycle is called for by the thermostat. ...
- Blower motor malfunction. ...
- Loose ductwork. ...
Is your furnace making too much noise?
- If your furnace has a inshot gas burner, it will make some noise when it burns the gas
- Furnaces with induced draft or forced draft motor will also make some noise during gas combustion
- Blower motor will also make some noise when blowing hot air through your HVAC system
When should I worry about my furnace noise?
In most cases, it is wise to call a service technician. A pinging or popping sound is most likely coming from one of the ducts and is not really something to worry about. If you hear an odd vibrating noise or whining, it may indicate a problem with your furnace and a technician really needs to check it out.
What to do if your furnace is making a loud noise?
However, if your furnace produces a loud humming or buzzing sound, there could be an issue with the motor. It could also indicate there's something wrong with the fan. Contact a furnace contractor to inspect the electrical components if it makes loud humming or buzzing sounds throughout its operation.
What does a bad furnace blower motor sound like?
A thumping, banging or clanking sound could be the result of a loose or broken off part in the motor or blower assembly. Should you hear one of these noises, turn off your furnace immediately. Call a professional to examine and repair or replace the broken part before you turn your furnace on again.
Why does my furnace make a loud noise when it turns on?
Your ductwork expands and contracts during your furnace's heating cycles. This can sometimes create booming or banging sounds when your air handler turns on and the pressure changes inside of your ducts.
Why is my furnace blower motor so loud?
Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing. A metal-scraping sound needs to be addressed right away and requires the attention of a professional HVAC technician.
How much should it cost to replace a furnace blower motor?
Nationally, you can expect to pay about $450 on average for a blower motor replacement, including labor. However, if your unit is under warranty, you might get away with a labor-only charge of as little as $150. More complicated units, or units that are difficult to access, can cost as much as $2,000 to replace.
What does a cracked heat exchanger sound like?
If you have a crack in the heat exchanger, you are likely to hear a rattling noise as your thermostat turns on the heat. Because the heat exchanger is made out of metal, as it is heated cracks will expand/contract, and can cause rattling, popping, and/or banging noises. Presence of Carbon Monoxide.
How do you fix a noisy fan motor?
Noisy Ceiling FanClean off the Blades. The simplest way to calm a noisy ceiling fan is by cleaning the blades. ... Tighten the Blade Screws. ... Tighten Light-Fixture Fasteners. ... Examine Any Warped Blades. ... Secure the Upper Canopy. ... Lubricate the Fan Motor. ... Balance the Blades. ... Check the Pull Chain.More items...
Should I be able to hear my furnace?
It's normal for your furnace to make some noise. For instance, a dull hum is to be expected. However, louder noises might spell trouble for your heating unit's components. Remember to turn off your furnace if it makes any alarming sounds and leave the repair job to a professional.
Why does my heating system make so much noise?
When heat hits the cold metal ducts, it causes expansion. When the heat cycle finishes, the ducts start to contract which may produce a loud bang. While these noises from your ductwork can sound concerning, there's usually nothing wrong with your ducts or ductwork system – it's just a normal sound.
Why does my furnace sound like an airplane taking off?
If your furnace sounds like an airplane or jet engine taking off, it's usually a gas issue. Gas could be leaking from a line or valve. Or, if you hear a click before the swooshing sound, you may have a broken heat exchanger that is leaking gas.
Why does my furnace sound like a freight train?
“Train” noise coming out of furnace: Make sure that your furnace filter is clean and isn't restricting airflow by being dirty. You can also check if other restrictions in the system are present and causing your furnace to work harder than it should.
Why Is My Furnace Making Banging Sounds?
If your furnace is making a loud booming or banging noise, the problem may be caused by a small gas explosion that happens when there’s a delay in...
Why Is My Furnace Making Shrieking Noises?
If your furnace is making a high-pitched squealing noise, this is an indicator of a problem with the motor such as a damaged belt. If you discover...
Why Is My Furnace Making Scraping Sounds?
If your furnace is making a scraping noise, this may be a sign of worn out ball bearings. On the other hand, the blower wheel may have also come lo...
Why Is My Furnace Making a Rattling Noise?
When something is loose in your furnace, it will cause vibration. Once a part becomes too loose, it can break other components in your gas or elect...
Why Is My Furnace Making Whistling Noises?
Your furnace may be making a whistling noise due to restricted airflow from a clogged air filter. Try changing your air filter and see if the spook...
Why Is My Furnace Making a Popping Noise?
At the beginning of a heating cycle, the blower motor distributes warm air into the air ducts in your house. If you notice a loud popping noise whe...
Why Is My Furnace Making Humming Sounds?
A majority of furnaces will produce a low humming noise while they are operating. If this noise is becoming noticeably loud, this is a signal of a...
Why Is My Furnace Making Loud Noises?
If your furnace is making a loud booming or banging noise, the problem may be caused by a small gas explosion that happens when there’s a delay in ignition. Gas can build up in your combustion chamber when the gas burners in your furnace do not ignite on time. If the gas burners are not igniting efficiently, this is an indicator of a clog or a gas pressure problem. Do not attempt to fix a gas burner without a licensed technician. Disassembling the heat exchanger or burners can cause a gas leak in your house.
Why does my furnace make a whistling noise?
Your furnace may be making a whistling noise due to restricted airflow from a clogged air filter. Try changing your air filter and see if the spooky sound goes away.
Why does my furnace have gas in it?
Gas can build up in your combustion chamber when the gas burners in your furnace do not ignite on time. If the gas burners are not igniting efficiently, this is an indicator of a clog or a gas pressure problem. Do not attempt to fix a gas burner without a licensed technician. Disassembling the heat exchanger or burners can cause a gas leak in your ...
What happens when you remove debris from a furnace?
If the debris is not removed from the gas burners each year, a large amount of gas will start to collect and cause holes to form in your heat exchanger.
What happens when a furnace is too loose?
When something is loose in your furnace, it will cause vibration. Once a part becomes too loose, it can break other components in your gas or electric furnace. Hire a technician to perform an inspection of the blower motor, hot surface ignitor, heat exchanger, or gas burners. A certified professional has the tools and equipment necessary to tighten loose parts in your furnace.
Can carbon monoxide poisoning cause nausea?
Carbon monoxide is odorless, colorless and tasteless but can be fatal when inhaled. Carbon monoxide poisoning can happen due to a crack in the heat exchanger and symptoms can include dizziness, nausea, and fainting.
Why does my furnace make a loud noise?
One common cause of a loud bang, or boom, is a dirty burner in your furnace. Having dirty burners in your furnace can cause a delay in ignition. So the gas will build up instead of the gas igniting immediately.
Why does my furnace make a whistling sound?
Unless your HVAC system is new, this is usually a result of deteriorating ductwork and poor connections to the main ducting trunkline.
Why does my heat exchanger make a clicking sound?
The clicking sound you hear could be the metal in heat exchanger heating up the cracks and they start to expand a tiny bit. Cracks in heat exchangers are the leading cause of carbon monoxide being dispelled into the home. Carbon monoxide is extremely dangerous and not to be ignored in any way.
Why does my furnace blower wheel get out of balance?
Another way the furnace blower wheel can get out of balance is if one of the balancing weights has fallen off of the blower wheel. Just remember, if the furnace is not sounding right, it’s best to call a qualified technician to inspect your HVAC system to make sure everything is in proper working order.
How long do blower bearings last?
Bearings should generally last a long time on blower motors. They can last as long as 30 years with proper HVAC maintenance. The things that can cause your bearings to expire prematurely is usually caused by overheating or an unbalanced furnace blower wheel.
Why is my furnace blower hot?
A blower motor will get very hot if the motor is trying to turn but won’t because of some sort of blockage. Another way a blower motor gets overheated is from having bad capacitors.
Why does my furnace sound like a washing machine?
This will make your furnace sound like your washing machine when it is out of balance. This means your blower wheel is out of balance, and if not corrected right away, it will cause other problems to your entire HVAC system. Sometimes this can be caused by a piece of paper, tissue or other material getting sucked into the return air duct. Materials can sucked in when a homeowner attempts to change the air filter while the unit is running. Another way the furnace blower wheel can get out of balance is if one of the balancing weights has fallen off of the blower wheel. Just remember, if the furnace is not sounding right, it’s best to call a qualified technician to inspect your HVAC system to make sure everything is in proper working order.
What is the number to call if my furnace is making a boom noise?
If your gas furnace is making boom noises, give us call at 580-699-5662. Pippin Brothers Home Services happily services the Greater Lawton, Fort Sill, and Duncan, Oklahoma area.
Why is my furnace pilot light not working?
Dirty, restricted or weak pilot light—If you have an older furnace, this may be the problem. These pilot light issues prevent the main burners from igniting.
Why is my ignition delayed?
But if you want to learn the lingo, delayed ignition can be caused by: Too much primary air— Primary air is the air mixed with the gas before it’s ignited. Too much primary air makes the gas-air mixture hard to light, causing gas to build up. The tech can easily fix this.
Why is my gas burner not igniting?
Too little gas at the burners—Like too much air, not enough gas makes it hard for the gas-air mixture to ignite. This is can be caused by low gas supply pressure. The tech will have to examine what’s causing this.
Can Pippin Brothers repair a furnace?
Contact Pippin Brothers to repair your furnace if you feel you are experiencing this problem. Alternatively, a precision tune-up and professional cleaning of your furnace can uncover symptoms that lead to this hazardous problem and address it before it has catastrophic consequences.
Delayed Ignition
A good starting point is to determine where and when exactly the banging noise is coming from. This will help you pinpoint the root of the problem.
Clogged Air Filter
A dirty air filter is a common issue people run into with their furnaces. This happens over time, as particles and debris, along with gas residue, start to build on the filter.
Wrong Size Ductwork
Sometimes, incompatible parts are behind your furnace’s banging noise. You should consider your ductwork’s size if the sound is coming from the vents. Wrong-sized duct lines lead to several problems.
Dirty Ductwork
When there’s an excessive collection of dirt and debris in the ductwork, you’ll face many problems, including a banging noise.
Summary
Delayed ignition is a common reason for banging noises coming from the furnace, but the sound can also occur due to a dirty air filter, debris in the ductwork, or an undersized duct line. You don’t want to ignore a banging noise as the problem can progress.
Who do you call to fix a loud furnace?
Call your local HVAC company and get a licensed technician to come look at your machine. If you're lucky, the technician can just perform regular maintenance and get your equipment running smoothly again.
Should you repair or replace a loud furnace?
In some unfortunate situations, the cost of repairs can be too high for it to be worth it. A general rule of thumb is to see if the cost of furnace repairs is more than half the cost of getting a new furnace. In those cases, it can be a better idea to just get a new furnace.
Is a Noisy Furnace a Serious Problem?
Furnaces are meant to be fairly quiet. Any time your furnace is being super-loud, it means something is going wrong. Depending on the issue, you might face all sorts of serious problems.
Why does my heating system blower expand?
The ducts expand at the supply side because there’s too much positive pressure, pushing the ductwork out. The ducts contract at the return side because of the negative pressure, allowing the surrounding air to push the ducts in.
What does delayed gas ignition mean?
Delayed gas ignition is when gas in the furnace builds up rather than igniting immediately. When the gas finally ignites after building up a while, a mini explosion happens—possibly harming your furnace.
Why is my furnace so loud?
It could be due to gaps in the ducts, ducts that are too small, or something known as delayed ignition. Identifying the problem is usually as simple as identifying the noise.
Why does my furnace make a whistling noise?
Gaps in the duct. When the ducts are not secured together properly, air can get out through those gaps to create the whistling noise that you are hearing. Try to pinpoint where the noise is coming from if you can. More often than not, there will be a small hole at the connecting point between the furnace and the duct that is close to the blower.
How to stop ducts from vibrating?
Add more screws. Screws can pop out from time to time, leaving the ductwork looser than it was originally. Simply replace those screws with new ones to tighten the ductwork. With the ducts now secure, that rattling or vibrating should be reduced or eliminated entirely.
How to stop a furnace from squeaking?
Reinforce the duct. Sometimes, the ducts can be slightly loose and move around when the furnace is on. That can result in banging or squeaking while the furnace runs. Simply reinforce the ducts when you can, and it should relieve the issue with those noises.
Why is a furnace considered a forced air furnace?
That’s because they distribute air through the home with air that gets pushed through vents and ducts connected to the heating unit.
How to fix a duct that vibrates?
Re-hang the duct. While loose ducts are the most common culprit for vibrating or shaking, ducts that are too tight can be an issue, too. If you don’t notice any looseness in the ducts, try re-hanging them. It could be helpful to know that you have secured them properly.
What is it called when a motor makes a noise?
If you’re certain that the noise is coming from the motor, it could be what is known as “bouncing .”
Why does my furnace make a noise?
As just mentioned, many different parts could be responsible for a furnace that is noisier than normal. The motor for the blower makes noise as it works to spin the fins, which get air moving.
What does a furnace sound like?
A noisy furnace could be giving you loud vibrational noises, high-pitched squeals or just general motor and air noise that sounds like a 747 is about to take off from your basement or garage.
How to check if a furnace is sealed?
You may see tape already there, but it could be coming lose and allowing air to whiz through when the furnace is running. Retape with duct tape if necessary.
What is the gas burner in a furnace?
Gas burners inside gas furnaces, ignite and fire as gas flows in. Metal air chambers such as your furnace plenum and attaching duct work all contain fast moving warm air.
Why is my furnace not starting up?
This may be a problem with the furnace transformer. It may not be converting the voltage from your home’s electrical system correctly, and thus , supplying the wrong voltage to your furnace to start it up.
What can help eliminate this abnormal noise with a furnace?
A simple test of the transformer can help eliminate this cause for this abnormal noise with a furnace.
Why are my vents closed?
If too many vents are closed or covered up in your home, is one culprit for this. Just check that good airflow is occurring at several of your registers in the home.
The Blower Fan Has Become Loose and Is Shaking
The blower fan is the part of the furnace that sends the hot air throughout the ducts in your home. It is held onto the motor by a screw. If the screw becomes loose, the fan will shake, creating a knocking sound.
The Air Filter Is Clogged and Making Noise
The air filter stops dust, hair, and other debris from traveling through your air ducts and into your home. Because these filters are constantly collecting dirt, they need to be replaced or cleaned every few months.
A Damaged Fan Belt Is Hitting Other Parts
A fan belt that is cracked or broken will hit metal parts of the furnace as it rotates. Damaged fan belts should be replaced immediately to keep other components of the heating system free from harm.
The Air Ducts Are Hitting the Walls
Expansion and contraction are two processes that take place in your air ducts when the temperature rises in your heating system. As the metal parts heat up, they begin to move around. So, a knock or a bang could be the result of your air ducts colliding with your walls or roofing.
How To Choose the Right HVAC Technician for the Job
Finding a professional to repair your heater is actually a simple process. When picking the perfect HVAC technician:
Final Thoughts
A knocking noise coming from your furnace can signal a wide variety of things.
