Navien Tankless Water Heater Humming Noise [10+ Easy Fixes] 1. An additional and rather pricey alternative is to install a water softening system between your water source and your water heater. Tankless water heaters will all make some noise when starting up and heating water, but the noise levels are usually reasonable and not cause for concern. Navien tankless heater What is the source of the noise? There is no need to be concerned about your tank being damaged as a result of this. Remove any debris from the tank and rinse it with cold water several times until the water flows clean. and continues for about 1 minute. Once your tankless water heater has finished heating water, its generally not very loud. Navien Tankless Water Heater Humming Noise [Fixed] by Eric Alvarez Your Navien Tankless Water Heater will make a humming noise due to the following reasons: Dirty heat exchanger Mounting issue Fan motor or motor mount comes loose Loose metal enclosure cover Sound may come out of the recirculation pump Condensate pump is not Check to see that all of the valves are completely open. It is possible that a water softening system will be required. Water Heater Making Noises When the noise occurs when there is no hot water being used, it's likely there is a vacuum that's siphoning water away from the unit and causing loud noise and vibration. Contact a professional if the ticking noise continues. If you are unable to adjust the valves on your own, you should get professional assistance. My navien tankless water heaters are making Increase the tightness of the heating element to resolve this issue. Disconnect the hose from the drainage valve. Gas tankless water heaters can be as loud as 90 decibels when starting up and heating water. As you can see, removing the sediment accumulation is not a difficult task that you can complete on your own. Please keep in mind that this is only a temporary solution for the time being. Because of the hard water and mineral buildup in your water, the noises emanating from your appliance are caused by mineral accumulation. Different pressure levels in your plumbing system might also cause your heater to be loud. My navien tankless water heaters are making a loud rumbling noise. Navien combi Another possible cause of the loud banging noise is that the water heaters heat exchanger is dirty.

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