Common Causes of a Whistling Furnace Noise
- Dirty Filters. A dirty air filter for the supply of heated air to your indoors might be the cause of a whistling sound.
- A Defective Gas Supply Valve. This issue affects gas-powered furnace systems. ...
- Ducts That Are Too Small. Improperly sized HVAC ducts are a common occurrence in systems that are not professionally installed.
- Leaking Air Ducts. ...
Why is my furnace making a loud humming noise?
Why Is the Furnace Making a Loud Humming Noise?
- Blower Motor Problems. If the humming sound comes from the blower area and is sudden and loud, the source is often the blower motor.
- Issues With the Transformer. Your HVAC unit has a transformer inside that can have issues that result in a humming sound. ...
- Vibrations in Ductwork. ...
- Loose Internal Parts. ...
- Broken Furnace Capacitor. ...
Why is furnace making a high pitched noise?
Why is furnace making a high pitched noise?
- Clean the debris from the ducts. This may be causing a blocked return vent, thus creating a whistling sound.
- Your supply vents may be blocked or shut off. Go to each room and open all the vents, even in the rooms you don't use.
- Keep your doors open throughout the house.
Why is my furnace not turning on?
[With Pictures]
- Furnace Won't Turn On Because The Furnace Switch Is OFF. ...
- Tripped Circuit Breaker Explains Why Furnace Won't Turn On. ...
- Bad Thermostat. ...
- Damaged or Loose Thermostat Wiring. ...
- Incorrect Thermostat Settings. ...
- Bad Capacitor Is A Reason Why Your Furnace Won't Turn On. ...
- Furnace Won't Turn On Due To Faulty or Filthy Blower Motor. ...
Why is my heater making a humming noise?
- Tank Containing Sediment & Mineral Deposits
- Poor water flow
- Frequent Changes in Water Pressure
- Leaky and condensed tanks
- Source of the water supply
- The condition of the heating element
What does it mean when your furnace is whistling?
A whistling noise caused by the furnace means that air is escaping somewhere in the system. It may a new or rebuilt fan that is forcing air through the ducts with more force, or it could be a loose connection in the ducts. Listen closely to locate the source of the whistling and then check for any loose connections.
How do I stop my heater from whistling?
What Can I Do To Keep My Heater From Whistling?Clean the debris from the ducts. This may be causing a blocked return vent, thus creating a whistling sound.Your supply vents may be blocked or shut off. Go to each room and open all the vents, even in the rooms you don't use. ... Keep your doors open throughout the house.
Why is my heating making a high-pitched noise?
A heater making a high-pitched noise may have a motor that isn't working properly. The problem may be caused by worn out bearings, overheatine to a buildup of dirt, or a problem with the capacitator.
Why is my furnace making a whining noise?
A whining (or grinding, screeching, banging) sound coming from a furnace is usually the result of a moving part beginning to fail - most often: The ventor motor, or. Circulating fan motor.
Should my furnace whistle?
If the whistling sound comes from the furnace and not from a vent or duct, the problem is usually an airflow issue, though it could also be a mechanical problem with the blower itself. As a furnace blows warm air throughout your home, the air passes through a filter, then into your ducts and out of your vents.
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.
How do you fix a high pitched heater?
1:364:03How to Fix a High Pitched Furnace Noise - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd literally change the pressure on that the bottom what seems like it's the bottom but it's reallyMoreAnd literally change the pressure on that the bottom what seems like it's the bottom but it's really just a piece of metal with a couple of screws in a dissolve.
Why is my heater blower squealing?
Make Sure Your Furnace Is Clean Keep your furnace filters clean. Sometimes a high-pitched whistling or squealing can be due to poor airflow. Poor or low airflow usually comes from your blower struggling to push out air. One of the reasons that your blower could be struggling includes a dirty air filter.
What does a bad furnace sound like?
Banging and Popping Noises Banging and popping sounds are normal. Often, furnaces make these sounds as the ducts expand and contract. However, if the banging and popping sounds are exceptionally loud and frequent, it could signal a problem with your furnace. Ductwork issues often cause loud bangs and pops.
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.
How much does it cost to replace a furnace inducer motor?
Average Draft Inducer Motor Replacement Cost The average furnace inducer motor cost is around $245, when the part is under warranty and you pay only the labor to have it installed. The replacement cost is $465 when the warranty has expired and you pay for the furnace inducer motor.
How do I lubricate my furnace blower bearings?
Apply two or three drops of 10-weight nondetergent motor oil (not all-purpose oil) to each port. Do not overlubricate. If the blower shaft has oil ports, it, too, should be lubricated annually, following the same procedure. You'll probably have to remove an access plate to get at the ports.
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 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 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.
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.
Why does my blower motor get overheated?
Another way a blower motor gets overheated is from having bad capacitors. Bad capacitors is generally a sign of lack of regular maintenance. Whenever we perform maintenance on a HVAC system we check the capacitors. Capacitors wear down over time and need to be checked regularly and replaced as needed.
Bad Blower Motor Bearing
Whining noise in most cases is due to a bad motor bearing. A bad motor bearing will result in excessive vibration which may travel outside the furnace through various ducts. You may be able to identify the bad bearing by operating your furnace with no load.
Dirty Burners
If your hot air furnace is making a whining noise, the most likely cause is from the burners. If they’re not cleaned regularly, the heat and flames can warp the metal chamber that the burners come in contact with.
Broken Blower Wheel
If your home’s furnace is making a whining noise, the first thing you should check is if it’s caused by a broken blower wheel. Blower wheels are responsible for moving cool air through the ducts and into your rooms.
Unlubricated Shaft Bearings
One of the most common causes of a furnace whining noise is that the bearings that support the motor shaft pinion gear need lubrication. The bearings allow the motor to spin freely while supporting the shaft on both ends.
Loose or Fraying Blower Belt
The most common cause of a furnace making a whining noise is a loose or fraying blower belt. The blower belt is responsible for spinning the motor that pushes air throughout your house, which helps heat it.
Malfunctioning Blower Motor
A furnace blower motor is a necessary part of your heating system and keeps the air moving through your whole home. If your furnace is making a whining noise, the most likely cause is a malfunctioning blower motor, which is in charge of delivering air through the ductwork.
Why does my blower make a whistling sound?
On the other hand, a high-pitched whistling sound is usually the result of a low airflow problem. Low airflow means that the blower is struggling to pull in enough air to be heated. Common causes of low airflow include: A dirty air filter. Closed or obstructed air vents.
Why does my furnace make a clicking noise?
If your furnace is making a clicking noise, it usually means there’s an issue with the ignition system. The ignition system is responsible for creating combustion, which is how your furnace creates heat. If the furnace can’t ignite for some reason, then you may hear a clicking noise as the igniter struggles to light.
Why do ducts make noise?
Because ducts are often made of sheet metal, it’s normal for ducts to make noises from time to time as they expand and contract. However, if the banging noises are distractingly loud or frequent, it could mean there’s an issue. Problems that cause extra loud ducts include: Dirty air filter. Closed or obstructed vents.
Why does my heat exchanger make a rattling noise?
This is because the metal is expanding, which causes a rattling noise. What to do: Contact a professional to inspect your heat exchanger for leaks. Unfortunately, if your heat exchanger is cracked, it will be a very expensive repair (almost equivalent to the cost of getting a new furnace).
Why does my furnace have to be heated on the return side?
Additionally, when your furnace pulls in cold air to be heated on the return side, it creates negative pressure which can cause the ducts to contract.
Why does my furnace squeal?
A high-pitched squeal coming from your furnace is usually the result of an issue with the blower. The blower in your furnace is powered by a motor, which has bearings that can wear out because of age or overheating. Overheating is usually caused by dirt buildup or a bad capacitor.
Why is my duct loud?
Problems that cause extra loud ducts include: Dirty air filter. Closed or obstructed vents. Undersized or dirty ductwork. What to do: Contact a professional to inspect your ductwork. They can see what is causing the loud banging noise problem and recommend a solution.
Why does my furnace whistle?
Why is My Heater Whistling? Your furnace creates the air flow to conduct heat in your home. Although technology has improved allowing for quieter heater operation, it’s somewhat impossible to make the furnace completely silent since it’s producing heat from the air flow. However, this does not mean that a whistling furnace is normal.
Why does my furnace make a loud noise?
This could be caused by anything from a loose connection in the ducts or something that is rebuilt in the furnace that may possess more power than the previous component, such as a rebuilt fan. The high-pitched sound coming through your ducts could also be a sign of low return airflow.
What happens if your furnace is leaking?
Money: If the hot air from your heater or furnace is leaking out, you could be spending more on your utility bills than necessary. Let Precision Heating & Air fix your whistling heater, so it operates efficiently and so you can avoid expensive heating costs.
How to stop high pitched sound in ducts?
Below are some of the items we recommend you do to help lessen the high-pitched sound: Clean the debris from the ducts. This may be causing a blocked return vent, thus creating a whistling sound. Your supply vents may be blocked or shut off. Go to each room and open all the vents, even in the rooms you don’t use.
How to get rid of a blocked vent in your house?
Make sure that no furniture or household items are covering the vents. Keep your doors open throughout the house. Your system needs to flow through your house instead of being blocked off.
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 make a noise?
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 is my gas burner not igniting?
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.
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.
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.
