Here Are 7 Possible Causes
- Broken blower wheel. When your furnace blower wheel is broken, it will make your furnace sound like metal scraping against metal and will really hurt your ears!
- Furnace Blower Wheel is out of balance. ...
- Dirty Burners. ...
- Blower Motor Bearings. ...
- Air Leak. ...
- Cracked Heat Exchanger. ...
- Noisy Transformer. ...
Why is my furnace making a high pitched noise?
If you hear a high pitched whistling sound when using your furnace, it could be that you have a leak in the air duct system. Unless your HVAC system is new, this is usually a result of deteriorating ductwork and poor connections to the main ducting trunkline.
Is your furnace beeping or chirping?
The beeping might start 1-2 months prior to that. A beeping sound is not the only noise that you can hear coming from your furnace. You should definitely take note of any sounds and try to fix the root cause as soon as you detect them. Why Is My Furnace Chirping?
Why does my furnace sound like metal scrap?
Here Are 7 Possible Causes. 1 Broken blower wheel. When your furnace blower wheel is broken, it will make your furnace sound like metal scraping against metal and will really hurt ... 2 Furnace Blower Wheel is out of balance. 3 Dirty Burners. 4 Blower Motor Bearings. 5 Air Leak. More items
Why is my air conditioner making noise when turned on?
While the air escapes the system, it will be making such a noise. The most common cause for such a noise is bad bearings in the blower motor. Belts that need replacement might also be to blame. By the way, a broken or loose belt can be making a clanking sound when you turn the unit on or off.
How do you fix a furnace that has a high-pitched noise?
A professional HVAC technician can inspect your unit and replace any loose, worn out or broken parts. If your unit has a belt-driven motor, loose or damaged belts can create squealing sounds as the motor runs. Realigning or replacing damaged belts will often do the trick here.
Should my furnace be making noise?
Furnaces generally aren't noisy, and most modern furnaces are designed for noise reduction. A properly functioning furnace shouldn't make too much noise, especially after initially starting. One that is generally needs repairs, and the type of sound you're hearing can help determine the exact issue with the system.
What does a bad furnace blower motor sound like?
Loud clanking or scraping, classified as a metal-against-metal sound signals a serious problem with the furnace's blower wheel. Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing.
How long do furnaces usually last?
A well-maintained furnace can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend its life even longer.
What does a bad furnace sound like?
There are a variety of problems that can cause your furnace to produce loud noises. Types of noises such as scraping, banging, whistling, and popping may be a sign of a loose part, cracked heat exchanger, or dirty gas burners.
Why does my furnace make a noise when it turns on?
Dirty furnace burners. Regardless of the cause, dirt buildup on your burners will delay the ignition of the gas that is fed to your system. As a result, gas will build up inside of your furnace and when the ignition finally begins, it creates a miniature explosion inside of your system that makes a loud banging sound.
What does a gas furnace sound like?
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.
Why is my furnace blower so loud?
The simplest explanation for screeching or whistling is that your furnace air filter could be clogged with dust, hair, and dirt. That eerie screech you hear might just be air desperately trying to get through. Fortunately, you can take care of this noise issue yourself, quickly and inexpensively.
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.
Why does my furnace make a rattling noise?
When furnaces make clanking or rattling noises, it could indicate loose ducts, or even that the furnace itself is sitting on an uneven surface. Examine the area where the furnace is in your home to determine if that’s the issue. If the furnace rattles when it turns off, this could be the sound coming from the metal parts of the furnace cooling down.
What does it mean when a furnace makes a noise?
Screeching or Scraping Sound. One of the most common noises that furnaces begin to make when something is going wrong is a bird-like chirping sound which could even be compared to the sound of metal scraping metal. Hearing this noise in your home could signal an issue with the motor or the blower wheel. If either one or both of these furnace parts ...
Why does my furnace make a loud boom?
Loud Boom. If your unit is making loud boom-like noises, it’s often an indication of dirty burners within your furnace. The dirt causes a delay when igniting, which leads to excessive gas buildup, so when the burners finally do light, it creates that loud banging noise you hear.
How to stop a furnace from making a noise?
After you identify the noise coming from your furnace, there are some steps you can take to get your furnace back into shape. With some regular maintenance, you can keep your furnace running for years before having to replace it altogether. To keep your unit maintained, take the time to: 1 Clean and replace the filter system. 2 Check the thermostat. 3 Clean and repair your furnace ducts. 4 Clean the vents. 5 Give it a thorough inspection annually.
Why is my ignition system not working?
Some of the more common problems with ignition systems include: Flame issues, due to an incorrect mixture of gas and air. A malfunctioning or thermocouple (the flame sensor) that’s covered in soot, which prevents it from detecting the pilot light to shut the gas valve.
Is it normal to hear a loud noise in Texas?
Some noises are completely normal, especially if your home has an older model. But other loud noises, such as banging or squealing, can signal that it’s time for a repair or replacement. Like most southern states, Texas stays warm for most of the year.
Why does my furnace make a beeping noise?
The furnace can be making a beeping sound because the filter needs to be changed, the power is out, the sensor is dirty or defective, and there is excessive condensation in the system. The noise might also be an indication of low thermostat batteries.
What is the sound coming from a furnace?
A beeping sound is not the only noise that you can hear coming from your furnace.
How to Fix a Beeping Furnace?
The first thing that you have to do is make sure that the sound is coming from the actual furnace. The noise might be coming from a smoke alarm or a carbon monoxide detector.
Why does my furnace light flash?
For example, if you have a Lennox furnace, slowly flashing LED lights might mean that the blower motor isn’t operating, and so on.
How to check if a humidifier is clogged?
Look for a clog or leaks in the water feed tube, drain line, water tap line, and the outside cas ing of the humidifier (if you have one).
What to do if your furnace sounds go away?
So, switch the furnace off. If the sound goes away, then the problem is with the heating unit.
Why is it important to change the filter on a furnace?
Changing this part of the unit regularly is incredibly important. A clogged or dirty filter reduces the lifespan of the system and its efficiency.
Why does my furnace make a whistling noise?
Whistling. If your furnace ever produces a whistling noise, it is usually indicative of some type of clog. It could be a simple fix like the need for a new filter, or something within the duct system or associated with the blower.
Why does my furnace beep?
Some furnaces will beep when the air filter needs to be changed. Always refer to the owner’s manual to see what a beeping sound means for your specific heating system. If the manual doesn’t offer any answers, you should contact a professional HVAC contractor for a diagnosis and repair.
What is the sound of a furnace?
Another alarming sound that may come from the furnace is a loud thud. While many furnaces make a thudding noise when they turn on, if it subsides quickly, this is usually no cause for concern. However, if it just recently started or continues, you will definitely want to have it inspected.
