
Noisy Water Heaters: What Could Be the Cause?
- Sediment Build-up This is probably the most common reason why your water heater makes noises. ...
- Significantly High Pressure and Temperature High water pressure can actually be a bad thing for your heater. ...
- Expanded or Burst Plumbing Pipes Water pipes can expand and contract over time as hot water comes in contact with them. ...
- Leaking Water Heater ...
Why is my water heater making noise when heating?
This is probably the most common reason why your water heater makes noises. When sediments build on the bottom of the tank, it traps the hot water underneath. It can result in a high-pitched popping sound every time you run the water heater. It would be best if you flushed your water heater regularly to avoid this from happening.
Why is my hot water tank making a popping noise?
Popping Noises Are Produced From Mineral Deposits If your water heater is making a popping noise, there may be a large buildup of mineral deposits and sediment in the water tank. When water becomes trapped beneath this buildup, it causes pockets of air and popping sounds to ocur in the system.
What causes water heater pressure to build up?
Some water heater problems that can result in pressure build-up include: Every water heater has a water temperature setting that can be adjusted. If the water temperature is set too high, though, it can eventually cause unsafe pressure inside the water heater.
What causes banging noises in my house?
Sediment buildup is a common cause of booming, banging noises. How does this cause noise? Water becomes trapped underneath the layer of sediment. The electric element turns on (or the burner in a gas heater) and begins to heat the trapped water. As the water heats and rises, it explodes through the sediment layer, causing the sound you hear.

How do I stop my water heater from whistling?
Turn off the appliance and check that all connections are tight. Also, look for any rust that could signify a crack in the tank. If everything seems in order but the water heater continues to whistle when you turn it back on, the tank is probably overheating and causing the TPR valve to open and release pressure.
Is it bad if my water heater is whistling?
If you only hear the whistling sound on rare occasions, then you don't need to be concerned. However, if you hear the whistling noise frequently, it could mean your water heater is battling constant high pressure, which is bad for your water heater and potentially dangerous.
Can a water heater explode?
While rare, residential water heater explosions do occur and can be deadly. Explosions are possible with both gas and electric tank water heaters, primarily those that are poorly maintained.
Why is my hot water heater whining?
The main reason for a whining water heater is because of a buildup of sediment in the tank. Hook up a garden hose to the draincock on your water heater. Place the other end of the house outside, either by a sewer drain or in the street, to allow for a clean draining.
Why would a water heater explode?
There are a number of reasons that your water heater can explode; however, the main reason behind water heater explosions is pressure. Anything that causes excess pressure on your water heating system, such as a poor anode rod, or a lot of sediment buildup, can all cause your water heater to explode.
Crackling, Popping and Rumbling
Sediments collect around the element tubes of a water heater. When the element is off, the caked sediments trap water beneath them, and the water h...
Singing, Screaming Or Screeching
Screaming sounds are created by water being forced through a small opening. This is usually caused by a valve that is not fully opened, either at t...
Tankless Water Heater Noise
Tankless water heaters have their own distinct noises. If you hear a clicking noise, this is typically just the flow switch turning on and off to s...
Why does my water heater make a popping noise?
If your water heater is making a popping noise, there may be a large buildup of mineral deposits and sediment in the water tank. When water becomes trapped beneath this buildup, it causes pockets of air and popping sounds to ocur in the system. To fix this issue, have your water heater flushed each year by a professional plumbing service. Stephens Plumbing offers water heater repair, tune-up, installation, and maintenance services to homes in Downers Grove and other areas of Illinois.
Why does my water heater smell?
Smelly water typically indicates bacteria in the water. Flushing the water heater tank should remove the bacteria and eliminate the odor. If the odor persists, it may be time to invest in a new water heater.
How long does a water heater last?
The average lifespan of a residential water heater is 8 to 12 years. The life cycle of this water system is dependant on variables such as usage patterns, water type, and maintenance routines. To prolong the life of your gas or electric water heater, we recommend performing at least a water heater tune-up with a professional at least once year.
How many homes have gas water heaters?
Gas water heaters are found in roughly 60% of the homes in the United States. There are many reasons gas is the preferred water heater model including:
What is the phone number for a water heater?
Give us a call by phone at (630) 968-0783 or schedule an appointment online to receive immediate support.
How to get more hot water in my home?
In need of more hot water? Turn up the temperature on the water heater! Be careful not to turn it too high - a few degrees should help bring more hot water into your home. If the hot water supply remains low, we recommend checking the water heater to cocnfirm if it's making noise. We also offer reliable HVAC services such as furnace repair, boiler installation, and humidifier replacement. Give us a call by phone at (630) 968-0783 or book an appointment online to receive assistance with a plumbing or HVAC issue.
Why is there no hot water in my house?
No Hot Water. If you have no hot water in your house, this is a sign of an issue with the internal heating element in the water heater. In a gas water heater, it could mean the pilot light has gone out. If the pilot light is on, the internal element may need to be replaced (found in both gas and electric water heaters).
Why does my water heater make a rumbling sound?
When the heater makes hot water, the liquid expands and passes through the debris. When this happens, you will notice a rumbling sound, especially when the water moves through the dirt.
Why does my water heater make a noise?
Here, when the unit makes heated water, it makes the same noise as a coffee maker. This noise happens because the water bubbles as it passes the sediment layer.
What if you use a gas water heater with sizzling sounds?
What if you use a gas water heater with sizzling sounds? Then condensation stands as a possible cause.
What happens if you stay in a hard water heater?
If you stay in a place that has hard water, your heater tank will have a buildup of mineral deposits. Here, as water moves to your home, it traps various materials such as magnesium and calcium carbonate. Luckily, these materials cannot harm your health.
Why does my tank pop?
Popping. After years of use, you will have a buildup of residue in your tank, which leads to popping sounds. This means you will need to clean out your tank as much as possible to remove limescale buildup. Residue comes in various forms and this solid particle stays at the bottom of the tank.
How to tell if a water heater is leaking?
To identify a leaky tank, you should use a leak detector designed for water heaters. When it finds a leak, it lets out an alarm. Easy to use and affordable, these items detect leaks within a few minutes.
How to stop noise from water heater?
You can also stop the noise by decreasing the pressure on the water heater. Reduce the temperature on the unit to perform this task.
Why does my water heater make a popping sound?
When the element is off, the caked sediments trap water beneath them, and the water heats until it makes a cracking or popping sound as it is forced through the deposits. This is more common on older units, and the noise increases as the deposit layer thickens. Clean or replace the element.
Why is my water heater making a loud noise?
Others reasons for a noisy tankless water heater model may be an issue with the burner, the fan may be dirty, or possibly a leak in the sealed combustion resulting in irregular gas combustion. Generally speaking, there is a lower chance of hearing strange noises with a tankless water heater vs tank model.
How to tell if water heater needs maintenance?
Another indication the heater needs maintenance is a rumbling sound, produced by sediments being stirred by the water flow inside the tank . Use a deliming mixture to clean the tank and drain the water heater. If maintenance does not cure the problem, the noises may be something as simple as the expansion and contraction ...
How to stop water heater from making noise?
Similarly, flushing the tank with a deliming solution annually will prevent heavy build up in the tank and serve to keep the elements cleaner as well.
Why does my tankless water heater make a clicking noise?
If you hear a clicking noise, this is typically just the flow switch turning on and off to start and stop the flow of water and is completely normal. If it’s making a lot of noise when turned on, it may be because calcium deposits are being left behind due ...
Why does my water heater make a scream?
Screaming sounds are created by water being forced through a small opening. This is usually caused by a valve that is not fully opened, either at the water heater or at a particular outlet such as a sink. Check the valves in you water lines.
Why does my water pump make a noise in the wall?
A knocking sound in your walls is related to pipes heating internally, and is literally known as “water hammering.” When water entering or leaving the tank is abruptly turned off, it can cause the pipes to move, banging against studs or the interior of walls. This can be caused by a dishwasher or toilet bowl, or by a water pump without a holding tank.
Why does my water heater make a noise?
Another common cause of water heater noises is called water hammering. It sounds eerily similar to someone knocking on the wall. It has to do with expansion and contraction as your pipes are heating. The right conditions, such as the dishwasher or toilet flushing, will abruptly turn off water entering or leaving the tank.
Why does my car make a banging noise?
Sediment buildup is a common cause of booming, banging noises. How does this cause noise?
How to get rid of a cold water tank in the house?
Open a hot water spigot in the house somewhere (the system needs air to fill the space as the water comes out) Flush the tank with the cold water supply a few times until the water runs clear. Leave the indoor hot water spigot open until water begins to run so the air can escape.
What is the purpose of checking valves?
Check to ensure that all valves are fully open. This includes any valves throughout the house (such as under the sinks).
Why do hot water tanks have heat traps?
Many hot water tanks have heat traps designed to prevent heat from escaping the tank (i.e. water from flowing the wrong direction). This is important as it can reduce wasted heat by about 60%. Imagine the effect on your utility bills!
Does sediment build up on a furnace make it louder?
While this won’t necessarily damage your unit, it does make it work harder and can reduce its lifespan. Plus, as more sediment builds up, the noise will get louder.
Is light tapping loud?
The trouble is, some designs can make light tapping sounds . The sound is normal and not an indication that something is wrong . In most cases, it won’t even be loud enough to be annoying.
Why does my water heater make a noise?
The noise is caused when the hot water bubbles up through the sediment in the bottom of the tank. When this occurs, it causes a popping sound.
What does it mean when a hot water tank makes a sizzling sound?
A sizzling sound can indicate water is leaking from the tank, and onto the hot burner assembly. In addition, a hammering or knocking noise often indicates the water flow is being stopped suddenly.
What does a water hammer sound like?
Most people have heard the term water hammer: It refers to a banging or hammering sound produced by the plumbing system when the water is forced to stop or change direction abruptly, resulting in a pressure surge within the system. Water hammer has the potential to burst pipes in the home and could even lead to the expansion and deformation of the water tank. Contact a plumber to help deal with this situation and consider installing a water hammer arrestor or pressure-reducing valve to address recurring issues.
Why does my water tank make a popping sound?
The sound is created when steam bubbles form under the sediment, then burst as the water heats up. A quick solution is to use a descaling product to help break down the limescale and minerals, but it may be better to flush and drain the tank to remove any built-up sediment.
How to fix a water tank that makes a sound?
The first thing to do is check the temperature and pressure relief valve that is usually located on the side of the water tank. This valve is intended to allow water to escape the tank if the pressure inside becomes too great. If the source of the sound is this relief valve, immediately turn off the gas, electricity, and water to the tank and call a plumber.
What is the sound of a boiling kettle?
Any high-pitched noises that sound similar to the whistling of a boiling stovetop kettle would fall into this screeching, screaming, and singing category. These sounds are typically produced when the flow of water through a valve is significantly restricted.
Where is the drain valve on a water tank?
The drain valve is at the bottom of the tank —use that to fill a bucket with water, and then dump the water. Be careful, as the water can be very hot and scalding. Doing this periodically may cause the drain valve to leak, so know that the valve may need replacement over time.
How to check if thermostat is working?
Run some hot tap water into a bucket and check the temperature. See if it matches the thermostat setting. If it is more than a few degrees off you may need to replace the thermostat.
Can hard water build up on heating elements?
Particularly if you have hard water you may have a buildup of scale on the heating elements. You can flush the tank and clean the heating elements to fix this problem. You may want to soften your water or treat it chemically for scale buildup in the future.
Why does my water heater run continuously?
Leaks, poor insulation, sediment buildup, years of wear and tear, and loose connections can all cause a water heater to run continuously. Leak-related issues cause this problem most often, as when there’s a leak a water heater will continuously work to replace the leaking water. Addressing this problem will in all likelihood require help from a professional plumber.
Why is my water heater running for months?
If your water heater has been running for months, it’s likely sediment buildup has already taken hold somewhere. This is normal, and removing sediment buildup isn’t all that hard if you know your way around your system. Minerals, salts, and debris all build up on the bottom of a water heater, and often sediment buildup is exacerbated by infrequent tank draining.
What Causes a Water Heater to Keep Running?
If you can’t diagnose the problem on your own, get help from a professional. Water heaters can be dangerous appliances if you don’t know how to safely tinker with them.
What happens if your water heater is leaking?
If your water heater’s tank is leaking, then your system will be constantly replacing the leaking water. There may also be a leak in the pipes which your water heater utilizes. If either your water heater or the connected pipes are leaking, along with a continuously running system, you may also notice:
How long does a water heater last?
Most water heaters will last about 10 to 12 years. Some excellently maintained systems will last longer than 15 years. If your water heater is getting up there in age, this could be why your system is continuously heating water.
How much does a water heater insulation reduce?
For example, you could reduce your hot water heater’s energy consumption by as much as nine percent. Standby heat loss is something all water heaters experience to some degree, but if you improve your system’s insulation you could reduce your system’s standby heat loss by almost 50%.
Why is my water heater not working?
Your water heater may not have been installed correctly—or maybe something got dislodged during a previous repair—and now you discover there are loose connections. If pipe fittings, valves, and/or the tank are not secure, water will flow right through these loose connections and likely cause major flooding.
