Air pressure buildup within your HVAC system can push against the walls of the ducts, causing them to expand, which causes a banging or popping sound several seconds after you turn the system on. Improperly installed ductwork often results in bending, which increases static pressure within the system.
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.
Check with maintenance, but you may be able to shut the valve before going to bed. That should shut off the heat to your bedroom and hopefully prevent the loud banging sounds. The other option for them would be to bleed the system, so that they can get rid of any excess air etc in the pipes.
Grinding and scraping furnace noises usually point to dry bearings within the furnace blower motor. These bearings need regular lubrication to maintain proper function. If you have a preventive maintenance plan with Estes Services, your technician handles this during an Atlanta furnace maintenance tune up.
A worn-out igniter can periodically fail, and if it keeps trying to light the gas, your furnace will make a clicking sound. The noise may last until the flame ignites or the gas valve closes. This failure and its corresponding clicking noise can also result from the igniter's wiring coming undone.
If the blower wheel becomes unbalanced, you may hear knocking sounds when the furnace runs. Calling in a professional to clean and rebalance the blower wheel not only saves you from more costly repairs, but in a worst case scenario, an unbalanced blower wheel may explode.
Whistling and tapping noises are common symptoms of internal mineral deposits as water struggles to flow through narrowed pipework. Similarly to air trapped in the system, you may also experience radiators that are hot at the top but cold at the bottom.
A sure sign that your bearing has failed is vibration. If the raceway surface of the bearing becomes damaged by abrasion, the rolling elements (the balls or rollers) will bounce around on the raceway surface during operation, causing high levels of vibration.
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.
A worn or damaged pilot bearing will make a whining or grinding noise. It will be very loud if the bearing is completely damaged. It occurs whenever the crankshaft and input shaft are rotating at different speeds.
Loose or Unsecured Parts: Over time, components within your air conditioner can become loose due to regular wear and tear. When these parts move around, they can create banging noises as the unit turns off and on. Duct Expansion and Contraction: Your ductwork can expand and contract with temperature changes.
Banging Sounds Coming From the HVAC Ductwork
This type of noise usually occurs in quick, short bursts. It is the result of expansion and contraction in the duct walls as internal temperatures rise or fall. This type of noise can also be the result of pressure changes within the ducting.
Why do radiators clank? Well, knocking, banging, and clanking radiator sounds are generally a sign of trapped water or air in the system. When either gets stuck, steam is prevented from moving through the pipe into the radiator.
Clean Any Dirty Burners
The bang that you hear is the sound of a larger volume of fuel finally igniting, creating a small explosion. This issue is called delayed ignition. If you suspect delayed ignition is producing the banging noise you hear, you'll need to clean your burners to stop the furnace from banging.
Bleeding your radiators will release any air that may be trapped inside. When air gets into your heating system, it can cause a banging noise because it increases the pressure in the system. Releasing pressure by bleeding the pipes of excess air can stop the banging noise from occurring.
The banging noise you heard is typically caused by your water pipes, and it is one of a few sounds that can come from your plumbing. While a water hammer could be the explanation, starting with a survey of all your visible water lines can help you fix or rule out any other causes.
If so, then expansion and contraction are probably the culprits. Expansion and contraction occur when your metal ducts, pipes, vents, and other components make noises while they heat up or cool down. While hearing these parts clang and bang together can be alarming, it usually doesn't indicate you have an issue.
Popping. If you hear popping sounds and you don't have a bag of popcorn in the microwave, you could be dealing with dirty furnace burners or damaged air ducts. When the burners are dirty, the buildup prevents them from igniting, which causes too much gas to build up, making a popping sound.
This is reality, and can happen if you fail to notice the signs the wheel bearings are deteriorating and need immediate repairs. Your wheel bearing might be bad if you hear unusual sounds like humming, squeaking, or clicking. Some experts say a bad wheel bearing can sound like a bird chirping.
Two of the most common symptoms that point to a faulty rod bearing are rod knock and illuminated warning lights.
The common sources of a furnace clicking sound are:
If it's faulty or dirty, it won't send the signal and the ignitor will click. Ignitor flame — The flame itself can run too cold to burn the gas or oil effectively, so the ignition clicks for several minutes or unendingly.
What causes plumbing pipes to make a banging noise? If you hear a vibrating, banging or pounding noise when taps are turned on or off it's usually due to hydraulic shock in your plumbing pipework. Hydraulic shock is more commonly known as “water hammer”. The banging noise you hear is the result of vibrations in pipes.
2) Trapped Air in the Pipes
Trapped air in the pipes, also called airlocks, can be a major cause of noisy heating pipes. The airlocks or air bubbles in your pipes create a loud sound that can sound like banging, knocking, or clunking.