navien tankless water heater making loud noise
A decibel meter may be used to determine how loud your tankless water heater is actually operating at any given time. Navien water heater problem horrendous noise Banging/rumbling: Banging and rumbling are two of the most prevalent sounds made by a running water heater. The debris, on the other hand, might cause the tank to overheat. Due to the possibility that the pipes are not firmly fastened, the water pressure might slam them into the wall studs or against the inside of the wall. If its making a lot of noise when turned on, it may be because calcium deposits are being left behind due to hard water in your area. As we discussed before in our article Reasons Why Your Water Heater Is Making Noise, it is important to note that leaks in water heaters can also generate noises. I checked the inlet pipe before the heater and there is normal water pressure coming in. It doesnt matter what youve heard about tankless water heaters, they may be rather noisy. When youve located it, tighten the pipe around it. If you are unable to adjust the valves on your own, you should get professional assistance. Almost certainly, there is a valve someplace that is only half closed. Navien Tankless Water Heater What is the source of the noise? To reduce noise from a tankless water heater, it typically requires flushing the system with vinegar, tightening any Navien combi Your last actions consist primarily of undoing what youve just done: turn off the spigot and detach the hose from the faucet. Leaving the interior hot water spigot open until the water starts to flow will allow the trapped air to escape. Similarly to banging, popping is frequently a symptom that there is too much sediment in your water heater tank and that it needs to be cleaned up. The most common cause of knocking or banging noise is sediment buildup. Typically, heat traps or check valves that have been added to encourage water flow in the appropriate direction may make a tapping or ticking sound while they operate. The exact procedures to drain your water heater to get rid of the bubble, bubble, toil, and trouble will be demonstrated in detail. Choose a day when your agent isnt showing your house if at all possible. The higher the concentration of mineral deposits in the water, the harder your appliance needs to work to heat it.At some point, your unit will either explode or cease to operate.It can also leak, resulting in a hefty water bill to cover the damage.Additionally, you will be need to replace your water heater entirely.This problem may be resolved by cleansing your water tank on a yearly basis. Gas tankless water heaters can be as loud as 90 decibels when starting up and heating water. Obstruction In Pipes Solution: 10. Perhaps youll need to call a plumber as well.If you have any questions or comments, please feel free to post them in the comment box below.Thank you. You should immediately contact a plumbing professional if your water heater is making rumbling, popping, or cracking noises. Perhaps a replacement of the valve on the water heater itself is required. Determine the source of the noise by paying close attention to it. If youre wondering what size breaker to use for your water heater, A 50 gallon water heater weighs approximately 180 lbs. A water heater that isnt producing enough hot water is an indication of a problem. WebNavien combi 7 : Loud Noise michael partensky 132 subscribers Subscribe 0 9.4K views 10 years ago Around 3 am, Nov. 04. Residue may take on a variety of shapes and sizes, and this solid particle settles to the bottom of the tank. Specifically, this is more prevalent on older units, and the noise level increases as the deposit layer becomes thicker. Find out more about the various ways a Partner Agent may assist you in selling your house. The presence of musty-smelling water indicates that your equipment is malfunctioning. Alkaline water contains a high concentration of calcium and magnesium, which generates rust, which is one of the most significant reasons of sediment buildup. The dip tube is what brings cold water into the tank, and over time, it can become clogged with sediment or scale. Navien Tankless Water Heater Humming Noise [10+ Easy Fixes] 1. If your renter is dissatisfied with the present design, you may replace it with a dielectric nipple to satisfy him. Being aware of these indications will allow you to take the required actions as soon as you see them, averting any potentially disastrous repercussions. Heres a quick rundown of some of the most common noises you might hear from your Navien tankless water heater, and what they typically mean: 1. Additionally, other kinds, in addition to standard heaters, might generate irritating noises. Many water heaters are equipped with heat traps or check valves, which are inserted in the pipes that run above the heater. A water heater that is humming and producing noise will require you to inspect its heating element if the problem is with the water heater humming and making noise. In March 2016 we had to replace the ignition switch. The valve should be able to open on its own when the situation calls for it. Contact a professional if the ticking noise continues. What happens if your water heater doesnt bang, but instead screams or screeches really loudly? The result is that water is driven into a small orifice, resulting in the screaming noise you hear. Do not advertise or try to compare pricing. Navien Despite the fact that a toilet only utilizes cold water, I have observed certain toilets that behave in this manner. In this circumstance, water flowing around the element might generate vibrations, resulting in a humming sound to be heard. Exhaust Vent Knocking Noise - Navien NPE-240A Tankless The electric element (or the burner in the case of a gas heater) is activated, and the trapped water begins to be heated. When cold water is introduced into the tank and circulated throughout the unit, the top portion of the unit will shake and produce the sound. If youre the lucky owner of a Navien tankless water heater, you might be wondering about the normal range of noises that your heater can make. Water Heater Many hot water tanks are equipped with heat traps, which are intended to keep heat from exiting the tank (i.e. Just replace the dip tube with a new one, and you should be good to go. After doing some research on this keyword, it seems that the most likely cause of a navien tankless water heater making a loud banging noise is that the water pressure is too high. Carbon monoxide gas, on the other hand, is an odorless and colorless gas that cannot be detected or seen. After detailing the three procedures necessary to lessen the noise produced by a tankless water heater, this article will go on to address remedies to other frequent problems related with these appliances. Once the tank is full of water, open the T&P valve for a bit to free the tank of extra air. This is significant since it has the potential to cut wasted heat by around 60%. First Turn On Hot Water We Hear This Loud Noise Outside Consider what this will do to your utility expenses! When the pipes are installed, they make contact with the wall, resulting in the noise. Are Tankless Water Heaters Loud? Yes, if you hear a bubbling sound, it is not the sound of a witchs brew being cooked in a cauldron! Once your tankless water heater has finished heating water, its generally not very loud. It is necessary to replace this piece if the ticking is caused by the heat trap in the model. If your Navien tankless water heater is making a loud banging noise, it could be caused by a few different things. Hissing Hissing noises are frequently suggestive of a leak. 2. Flushing the tank with a deliming solution once a year will avoid significant buildup in the tank and will also keep the tank and surrounding parts cleaned. Vibrations: The most typical type of noise created by fluctuating water pressure is a ticking sound. In order to complete this assignment, lower the temperature of the device. In March 2016 we had to replace the ignition switch. Disconnect the hose from the drainage valve. Sediment Build-up. Go to the running faucet and turn it off. While its true that every Navien is different, there are some basic guidelines that can help you determine whether or not a noise is something to be concerned about. Loose Or Dirty Parts Solution: 4. Flush the water heater: at least once or twice a year, flush out your water heater. Water is trapped behind the sediment layer, causing it to become stagnant. A strange groaning sound coming from the pipes or the tankless water heater when you flush the toilet might indicate that this is the source of your problem. Tankless Water Heater Making Contractor's Assistant: Is your Navien water heater gas or electric? While this may not necessarily cause harm to your device, it will make it work harder and may shorten its useful life. First Turn On Hot Water We Hear This Loud Noise Outside Their metallic flavor and odor are present as well as their presence. This is not the best circumstance for the selling of your residence. Adding some additional straps and insulation around your water heater can help to keep it from moving about and being influenced by fluctuations in water pressure. 2023 ERNIEGRAVES | Process Measurement & Control
This can be caused by a dishwasher or toilet bowl overflowing, as well as by a water pump that does not have a collection tank. Various minerals, such as magnesium and calcium carbonate, get trapped in this area when water flows towards your home. It is loud enough to hear throughout our open plan house, and on all floors. You must contact your plumber as soon as possible in order to get these leaks repaired. If you have hard water in your house, you should invest in a water conditioning system to ensure that your appliances continue to operate at peak efficiency. Alternatively, the noise could be coming from the water pipes themselves, which could be due to a build-up of sediment or other debris. Every two months, inspect and replace the TRP valve, which should be replaced every three years. Due to the possibility of pipe rupture caused by water hammer, you may choose to decrease the systems pressure using a pressure-reducing valve in order to eliminate this noise. A critical component in determining whether or not your water heater may burst is the amount of pressure that exists inside the appliance. It is loud enough to hear throughout our open plan house, and on all floors. If the noise is happening at times of low use, like nighttime, its probably time to take a closer look. For example, the sound produced by an electric tankless water heater is distinct. With a little troubleshooting, you should be able to figure out whats causing the noise and get it fixed quickly and easily. It is usual for these types of noises to occur once in a while with electric heaters, so if your system sometimes emits a crackling sound, it is probably not a major problem. Tankless water heater making strange noises? Here Corrosion can cause cracks and fractures in the water tanks walls and bottom. However, if it continues to strike the wall with sufficient force, it may ultimately cause damage. To remedy the problem, tighten the part just a little bit more. Clean parts and ineffective systems are examples of such things. That is why it is critical that you maintain the condition. It sounds like a loud drip or knocking/tap, one tap every 3 sec. This can happen if the water heater is set to a higher temperature than the incoming water pressure can handle. Examine your systems temperature settings if it overheats and shuts down unexpectedly. Water Hammering Solution: 5. How To Install A Power Vent Gas Water Heater? Then quiet. Therefore, make sure that your thermostat is set to the proper temperature range. This means that you need to get your leaky appliance repaired or replaced immediately. Some water heaters create buzzing noises when they are operating. Leaks Solution: 9. Then quiet. When gas tankless hot water heaters are turned on and heating water, they produce a lot of noise, however the decibel levels are normally less than 90 dB. Water Heater Making Noises Contractor's Assistant: Is your Navien water heater gas or electric? These are usually nothing to worry about, and are simply the sound of the burner igniting. Mineral Build-Up Solution: 2. | Theme by SuperbThemes.Com. First, it could be that the water heater is over-pressurized. Once youve determined the source of the noise, you may go on to determining the best course of action to take to decrease or eliminate the problem. When it comes to leaks of this nature, the vast majority of the time, expert plumbing assistance is required. Navien 240A Revving Noise If you hear any of these noises coming from your Navien tankless water heater, theres no need to panic. Simply drain the sediment from the bottom of the tank, and you should be good to go. To your advantage, you may complete these maintenance tasks on your own, saving you the cost of hiring a professional plumber. For the last several months, whenever you turn on the hot water after it's not been used for a while I hear this loud "whoop" kind of noise outside. The tankless system may have an internal check valve, so when the small water heater turns on to heat water, or hot water gets to it, you may end up with warmer water once you stop using it while the tank recovers. To clean the heat exchanger, youll need to contact a professional. This valve is intended to allow water to escape the tank if the pressure inside becomes too great. A check valve installed in the water line will usually solve the problem since it will prevent other plumbing fixtures from interfering with the flow of water to the water heater in most circumstances. First, it could be that the water heater is over-pressurized. Everything was good until recently. The hum can be irritating to everyone, but it will not cause damage to the heater or its components. Check the filter. jdidier5 2 yr. ago. It sounds like a loud drip or knocking/tap, one tap every 3 sec. Switch on the hot water faucet at the same sink. You will be advised by a Clever Partner Agent as to which repairs are worthwhile. To determine whether this is the case, look to see if the power cable has been detached from the heating unit. When comparing a tankless water heater to a traditional tank water heater, there is a lesser likelihood of hearing unusual noises. It can result in a high-pitched popping sound every time you run the water heater. ERNIEGRAVES | Process Measurement & Control. Tankless water heaters have their own individual noises that are difficult to distinguish. When the correct conditions are met, such as when the dishwasher or toilet flushes, the water entering or exiting the tank will be immediately shut off. When it comes to electric water heaters, the element is often installed vertically in respect to the tank. However, even if those noises do not necessarily indicate a problem with the heater, you should investigate the source of the noise and fix any underlying problems. Corrosion and rust can build up in the valve, causing it to stop operating completely. WebWe have an external Hot Noritz tankless water heater that was installed in May of 2008. Even though those noises dont always indicate a problem with the heater, you should determine the cause of the sound and address any underlying issues. The source of a bubbling noise coming from a water heater can be traced to garbage. Check to see that all of the valves are completely open. This is just to remove any extra air that may have built up in the pipe. They understand what local purchasers are looking for and what they are willing to pay extra for. To do this, remove the object from the heater and soak it in a dish filled with vinegar before cleaning it. Water Heater Making a Knocking Noise: Let Additionally, in severe circumstances, popping sounds can be heard when the sediment begins to break apart as a result of the heat. Each of these issues has a distinct remedy, which we shall cover in further detail below. Even a tankless gas water heater is susceptible to the same problem. Navien Tankless Water Heater It sounds awful and not like any other recirculating pump I've ever heard. Each of the following noises is related to the current condition of the water. Navien tankless heater When water droplets develop in the tank, they have the potential to fall onto the units burner. Another possibility is that your unit is experiencing a phenomena known as water hammer, which occurs when your water supply is switched off and then a large amount of water rapidly surges back through the pipes. Are There Wild Emus In America,
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A decibel meter may be used to determine how loud your tankless water heater is actually operating at any given time. Navien water heater problem horrendous noise Banging/rumbling: Banging and rumbling are two of the most prevalent sounds made by a running water heater. The debris, on the other hand, might cause the tank to overheat. Due to the possibility that the pipes are not firmly fastened, the water pressure might slam them into the wall studs or against the inside of the wall. If its making a lot of noise when turned on, it may be because calcium deposits are being left behind due to hard water in your area. As we discussed before in our article Reasons Why Your Water Heater Is Making Noise, it is important to note that leaks in water heaters can also generate noises. I checked the inlet pipe before the heater and there is normal water pressure coming in. It doesnt matter what youve heard about tankless water heaters, they may be rather noisy. When youve located it, tighten the pipe around it. If you are unable to adjust the valves on your own, you should get professional assistance. Almost certainly, there is a valve someplace that is only half closed. Navien Tankless Water Heater What is the source of the noise? To reduce noise from a tankless water heater, it typically requires flushing the system with vinegar, tightening any Navien combi Your last actions consist primarily of undoing what youve just done: turn off the spigot and detach the hose from the faucet. Leaving the interior hot water spigot open until the water starts to flow will allow the trapped air to escape. Similarly to banging, popping is frequently a symptom that there is too much sediment in your water heater tank and that it needs to be cleaned up. The most common cause of knocking or banging noise is sediment buildup. Typically, heat traps or check valves that have been added to encourage water flow in the appropriate direction may make a tapping or ticking sound while they operate. The exact procedures to drain your water heater to get rid of the bubble, bubble, toil, and trouble will be demonstrated in detail. Choose a day when your agent isnt showing your house if at all possible. The higher the concentration of mineral deposits in the water, the harder your appliance needs to work to heat it.At some point, your unit will either explode or cease to operate.It can also leak, resulting in a hefty water bill to cover the damage.Additionally, you will be need to replace your water heater entirely.This problem may be resolved by cleansing your water tank on a yearly basis. Gas tankless water heaters can be as loud as 90 decibels when starting up and heating water. Obstruction In Pipes Solution: 10. Perhaps youll need to call a plumber as well.If you have any questions or comments, please feel free to post them in the comment box below.Thank you. You should immediately contact a plumbing professional if your water heater is making rumbling, popping, or cracking noises. Perhaps a replacement of the valve on the water heater itself is required. Determine the source of the noise by paying close attention to it. If youre wondering what size breaker to use for your water heater, A 50 gallon water heater weighs approximately 180 lbs. A water heater that isnt producing enough hot water is an indication of a problem. WebNavien combi 7 : Loud Noise michael partensky 132 subscribers Subscribe 0 9.4K views 10 years ago Around 3 am, Nov. 04. Residue may take on a variety of shapes and sizes, and this solid particle settles to the bottom of the tank. Specifically, this is more prevalent on older units, and the noise level increases as the deposit layer becomes thicker. Find out more about the various ways a Partner Agent may assist you in selling your house. The presence of musty-smelling water indicates that your equipment is malfunctioning. Alkaline water contains a high concentration of calcium and magnesium, which generates rust, which is one of the most significant reasons of sediment buildup. The dip tube is what brings cold water into the tank, and over time, it can become clogged with sediment or scale. Navien Tankless Water Heater Humming Noise [10+ Easy Fixes] 1. If your renter is dissatisfied with the present design, you may replace it with a dielectric nipple to satisfy him. Being aware of these indications will allow you to take the required actions as soon as you see them, averting any potentially disastrous repercussions. Heres a quick rundown of some of the most common noises you might hear from your Navien tankless water heater, and what they typically mean: 1. Additionally, other kinds, in addition to standard heaters, might generate irritating noises. Many water heaters are equipped with heat traps or check valves, which are inserted in the pipes that run above the heater. A water heater that is humming and producing noise will require you to inspect its heating element if the problem is with the water heater humming and making noise. In March 2016 we had to replace the ignition switch. The valve should be able to open on its own when the situation calls for it. Contact a professional if the ticking noise continues. What happens if your water heater doesnt bang, but instead screams or screeches really loudly? The result is that water is driven into a small orifice, resulting in the screaming noise you hear. Do not advertise or try to compare pricing. Navien Despite the fact that a toilet only utilizes cold water, I have observed certain toilets that behave in this manner. In this circumstance, water flowing around the element might generate vibrations, resulting in a humming sound to be heard. Exhaust Vent Knocking Noise - Navien NPE-240A Tankless The electric element (or the burner in the case of a gas heater) is activated, and the trapped water begins to be heated. When cold water is introduced into the tank and circulated throughout the unit, the top portion of the unit will shake and produce the sound. If youre the lucky owner of a Navien tankless water heater, you might be wondering about the normal range of noises that your heater can make. Water Heater Many hot water tanks are equipped with heat traps, which are intended to keep heat from exiting the tank (i.e. Just replace the dip tube with a new one, and you should be good to go. After doing some research on this keyword, it seems that the most likely cause of a navien tankless water heater making a loud banging noise is that the water pressure is too high. Carbon monoxide gas, on the other hand, is an odorless and colorless gas that cannot be detected or seen. After detailing the three procedures necessary to lessen the noise produced by a tankless water heater, this article will go on to address remedies to other frequent problems related with these appliances. Once the tank is full of water, open the T&P valve for a bit to free the tank of extra air. This is significant since it has the potential to cut wasted heat by around 60%. First Turn On Hot Water We Hear This Loud Noise Outside Consider what this will do to your utility expenses! When the pipes are installed, they make contact with the wall, resulting in the noise. Are Tankless Water Heaters Loud? Yes, if you hear a bubbling sound, it is not the sound of a witchs brew being cooked in a cauldron! Once your tankless water heater has finished heating water, its generally not very loud. It is necessary to replace this piece if the ticking is caused by the heat trap in the model. If your Navien tankless water heater is making a loud banging noise, it could be caused by a few different things. Hissing Hissing noises are frequently suggestive of a leak. 2. Flushing the tank with a deliming solution once a year will avoid significant buildup in the tank and will also keep the tank and surrounding parts cleaned. Vibrations: The most typical type of noise created by fluctuating water pressure is a ticking sound. In order to complete this assignment, lower the temperature of the device. In March 2016 we had to replace the ignition switch. Disconnect the hose from the drainage valve. Sediment Build-up. Go to the running faucet and turn it off. While its true that every Navien is different, there are some basic guidelines that can help you determine whether or not a noise is something to be concerned about. Loose Or Dirty Parts Solution: 4. Flush the water heater: at least once or twice a year, flush out your water heater. Water is trapped behind the sediment layer, causing it to become stagnant. A strange groaning sound coming from the pipes or the tankless water heater when you flush the toilet might indicate that this is the source of your problem. Tankless Water Heater Making Contractor's Assistant: Is your Navien water heater gas or electric? While this may not necessarily cause harm to your device, it will make it work harder and may shorten its useful life. First Turn On Hot Water We Hear This Loud Noise Outside Their metallic flavor and odor are present as well as their presence. This is not the best circumstance for the selling of your residence. Adding some additional straps and insulation around your water heater can help to keep it from moving about and being influenced by fluctuations in water pressure. 2023 ERNIEGRAVES | Process Measurement & Control This can be caused by a dishwasher or toilet bowl overflowing, as well as by a water pump that does not have a collection tank. Various minerals, such as magnesium and calcium carbonate, get trapped in this area when water flows towards your home. It is loud enough to hear throughout our open plan house, and on all floors. You must contact your plumber as soon as possible in order to get these leaks repaired. If you have hard water in your house, you should invest in a water conditioning system to ensure that your appliances continue to operate at peak efficiency. Alternatively, the noise could be coming from the water pipes themselves, which could be due to a build-up of sediment or other debris. Every two months, inspect and replace the TRP valve, which should be replaced every three years. Due to the possibility of pipe rupture caused by water hammer, you may choose to decrease the systems pressure using a pressure-reducing valve in order to eliminate this noise. A critical component in determining whether or not your water heater may burst is the amount of pressure that exists inside the appliance. It is loud enough to hear throughout our open plan house, and on all floors. If the noise is happening at times of low use, like nighttime, its probably time to take a closer look. For example, the sound produced by an electric tankless water heater is distinct. With a little troubleshooting, you should be able to figure out whats causing the noise and get it fixed quickly and easily. It is usual for these types of noises to occur once in a while with electric heaters, so if your system sometimes emits a crackling sound, it is probably not a major problem. Tankless water heater making strange noises? Here Corrosion can cause cracks and fractures in the water tanks walls and bottom. However, if it continues to strike the wall with sufficient force, it may ultimately cause damage. To remedy the problem, tighten the part just a little bit more. Clean parts and ineffective systems are examples of such things. That is why it is critical that you maintain the condition. It sounds like a loud drip or knocking/tap, one tap every 3 sec. This can happen if the water heater is set to a higher temperature than the incoming water pressure can handle. Examine your systems temperature settings if it overheats and shuts down unexpectedly. Water Hammering Solution: 5. How To Install A Power Vent Gas Water Heater? Then quiet. Therefore, make sure that your thermostat is set to the proper temperature range. This means that you need to get your leaky appliance repaired or replaced immediately. Some water heaters create buzzing noises when they are operating. Leaks Solution: 9. Then quiet. When gas tankless hot water heaters are turned on and heating water, they produce a lot of noise, however the decibel levels are normally less than 90 dB. Water Heater Making Noises Contractor's Assistant: Is your Navien water heater gas or electric? These are usually nothing to worry about, and are simply the sound of the burner igniting. Mineral Build-Up Solution: 2. | Theme by SuperbThemes.Com. First, it could be that the water heater is over-pressurized. Once youve determined the source of the noise, you may go on to determining the best course of action to take to decrease or eliminate the problem. When it comes to leaks of this nature, the vast majority of the time, expert plumbing assistance is required. Navien 240A Revving Noise If you hear any of these noises coming from your Navien tankless water heater, theres no need to panic. Simply drain the sediment from the bottom of the tank, and you should be good to go. To your advantage, you may complete these maintenance tasks on your own, saving you the cost of hiring a professional plumber. For the last several months, whenever you turn on the hot water after it's not been used for a while I hear this loud "whoop" kind of noise outside. The tankless system may have an internal check valve, so when the small water heater turns on to heat water, or hot water gets to it, you may end up with warmer water once you stop using it while the tank recovers. To clean the heat exchanger, youll need to contact a professional. This valve is intended to allow water to escape the tank if the pressure inside becomes too great. A check valve installed in the water line will usually solve the problem since it will prevent other plumbing fixtures from interfering with the flow of water to the water heater in most circumstances. First, it could be that the water heater is over-pressurized. Everything was good until recently. The hum can be irritating to everyone, but it will not cause damage to the heater or its components. Check the filter. jdidier5 2 yr. ago. It sounds like a loud drip or knocking/tap, one tap every 3 sec. Switch on the hot water faucet at the same sink. You will be advised by a Clever Partner Agent as to which repairs are worthwhile. To determine whether this is the case, look to see if the power cable has been detached from the heating unit. When comparing a tankless water heater to a traditional tank water heater, there is a lesser likelihood of hearing unusual noises. It can result in a high-pitched popping sound every time you run the water heater. ERNIEGRAVES | Process Measurement & Control. Tankless water heaters have their own individual noises that are difficult to distinguish. When the correct conditions are met, such as when the dishwasher or toilet flushes, the water entering or exiting the tank will be immediately shut off. When it comes to electric water heaters, the element is often installed vertically in respect to the tank. However, even if those noises do not necessarily indicate a problem with the heater, you should investigate the source of the noise and fix any underlying problems. Corrosion and rust can build up in the valve, causing it to stop operating completely. WebWe have an external Hot Noritz tankless water heater that was installed in May of 2008. Even though those noises dont always indicate a problem with the heater, you should determine the cause of the sound and address any underlying issues. The source of a bubbling noise coming from a water heater can be traced to garbage. Check to see that all of the valves are completely open. This is just to remove any extra air that may have built up in the pipe. They understand what local purchasers are looking for and what they are willing to pay extra for. To do this, remove the object from the heater and soak it in a dish filled with vinegar before cleaning it. Water Heater Making a Knocking Noise: Let Additionally, in severe circumstances, popping sounds can be heard when the sediment begins to break apart as a result of the heat. Each of these issues has a distinct remedy, which we shall cover in further detail below. Even a tankless gas water heater is susceptible to the same problem. Navien Tankless Water Heater It sounds awful and not like any other recirculating pump I've ever heard. Each of the following noises is related to the current condition of the water. Navien tankless heater When water droplets develop in the tank, they have the potential to fall onto the units burner. Another possibility is that your unit is experiencing a phenomena known as water hammer, which occurs when your water supply is switched off and then a large amount of water rapidly surges back through the pipes.