Rinnai Tankless Water Heater Noise: Know How to Get Rid of Them

Well, Rinnai tankless water heater noise is quite common when it’s doing its job. Sometimes the noise may indicate an issue or potential problem in the heater, like a clogged system or ignition issue.

In such a case, the best thing to do is to determine the type of noise and fix the issue before it becomes alarming! And here, you will find the same backed by in-depth research.

Rinnai Tankless Water Heater Noise: Reasons and Solutions

Like all other operating machines that make some noise while working,a tankless water heater makes noise when hot water is turned on.

But when you notice some unusual noise in your tankless water heater, check for any kind of issues or defects in your heater as a precaution.

The first thing you need to do is find the cause of the noise. Knowing the source will make it easier for you to decide the type of maintenance it needs.

The most common reasons and their solutions are discussed briefly in this article.

Unsteady fittingsTighten the loose fittings.
Check Valve IssueCheck and fix the valves.
Clog SystemClean the system.
Altered water pressureProperly set the pressure valves and arrange to hold the pipes in position.
Ventilation issueRemove any blockage and make sure the vent pipes are attached properly.
Faulty sensorClean the flow sensor if it’s dirty. Call a plumber in case of a defective one.
Faulty Ignition and VibrationUse a mat between the wall and the heater when installing.

Loose parts might be the cause of your Rinnai tankless water heater humming noise

The humming noise that keeps coming from your Rinnai tankless water heater may be the result of some loose parts.

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All you need is to fasten the loose parts after you find them. Be very careful about fastening the right parts. Although it’s not a severe problem neglecting it can bring damage in the long run.

Rinnai tankless water heater loud noise caused by disrupted water flow

If the water heater makes a screeching sound, its water flow is most likely being disrupted.

Check the valves and make sure they are open. Fix the valves to the right position to get a discontinued water flow.

Get help from a professional if the sound continues after taking the above-mentioned steps.

Rinnai tankless water heater whistling noise

The whistling or hissing noise from the heater often indicates the sediment buildup. Sometimes you can hear popping sound due to the sediment breaking.

You’ll need to flush the water heater clean once in a while to get rid of the sediment. If the sediment seems to be excessive, you might need to wash them out with your hand.

Water fluctuation causes Rinnai tankless water heater noise problem: Ticking and clicking

Water pressure fluctuation causes ticking and clicking sounds in tankless water heaters. The pipes may hit against the wall and make such noise.

The ticking sound also may occur due to the check valve, which is not considered as alarming.

To get rid of this kind of noise, you may consider using spacers to hold the pipes in position. It will stop their motion with the fluctuation of water. And there you go! No ticking noise.

Rinnai tankless water heater making loud noise: Ventilation issue

If the ventilation process is being blocked, it’s common for a tankless water heater to make loud noises.

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Ensure the vent pipes are all attached properly and check for any blockage in the vent. Remove any kind of garbage, nest, or bushes from the vent.

Rinnai tankless water heater groaning noise due to faulty sensor

If your Rinnai tankless water heater is making a groaning noise, it might have some trouble with the sensor.

A faulty flow sensor can cause the heater to make a groaning noise. The reason can be a dirty flow sensor or some functional issue.

In case of a dirty flow sensor, cleaning will do the work. But if there’s any kind of defect in the sensor, it’s better to leave it to the expert hands.

Tankless water heater makes loud rumbling noise: Vibration and Ignition

Upon turning on the water, the ignition of the heater will make a rumbling noise. Which is pretty normal for machines. The ignition creates a vibration on the heater’s body. In the case of the heaters attached to the wall, the vibration will create a loud rumbling noise.

You can get rid of this annoying sound by placing a mat between the wall and the unit. For better results, you can try positioning the heater inside an insulated case.

This Video Will Help You Too!

Frequently Asked Questions (FAQs)

Do Rinnai tankless water heaters make noise?

Yes, it does. Rinnai tankless water heater noise is mainly caused by the ignition and working process of the unit. But the sound decreases once it’s done heating the water.

Is Rinnai noisy?

Rinnai tankless water heater is not noisy. It makes an adequate range of sound due to the ignition and working process of the unit.

How to stop my water heater from making noise?

Check the source of the noise and fix it if there’s any issue. You can place the heater in an insulated case to decrease the sound in case of the normal sound.

Wrapping Up

To round off, a tankless water heater definitely makes less sound than a tank water heater. But it’s not completely soundless.

Apart from its noise troubles, Rinnai provides you with amazing service. obviously, you’re not gonna run out of hot water when you’re in need of it!

Although, Rinnai tankless water heater noise can be of many kinds and confusing. But when you’re smart enough to differentiate the regular one from the alarming one, it’s not much of an issue. Because you already know what to do!

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