The Common Causes Of Tankless Water Heater Repair Issues And How To Resolve Them | Irving, TX

The Common Causes Of Tankless Water Heater Repair Issues And How To Resolve Them | Irving, TX

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A tankless water heater can be a beneficial investment. You can save high costs as it heats water only on-demand. In addition, it is around 24% – 34% more energy efficient than standard storage tank equipment for homes that use 41 gallons of hot water each day.

You may also face lesser repairs as the machine is durable and lasts for above 20 years. Regular care and maintenance are pivotal for its longevity. However, tankless water heaters have their unique set of problems.

A tankless water heater repair service in Irving, TX, can keep your unit running when an issue arises. Read on to know the causes of tankless water heater issues and how to resolve them.

Common Causes and Solutions

Although rare, your equipment may face issues within its components or functions. It is essential to take timely action as soon as you notice any fault within the machine.

By knowing the common causes, you can take the necessary measures to prevent them. In addition, identifying the cause helps in resolving the issue quickly before it worsens.

The most common causes that call for a tankless water heater repair and other solutions in Irving, TX, include the following:

Mineral or Sediment Build-up

The water that comes to your home through the main water line may contain dissolved minerals. When you use the tankless water heater, some minerals remain within the machine. It soon accumulates over time.

You can notice the signs through water discoloration and unpleasant odor. Excess mineral or sediment build-up may also damage the heating elements.

A higher volume of hard water increases the risk for damages. Magnesium and calcium lead to scaly build-up that impairs the functioning of the heating elements. A repair is necessary to restore the components.


You have to clear the sediment and excess mineral accumulation from within the tankless water heater. Start by checking the machine’s water filter. You may also try flushing out the mineral deposits. It is recommended to flush the machine at least once in six months to prevent any accumulation.

If the issue persists, call a tankless water heater repair service at the earliest. Experts use professional equipment to clean your device without damaging any of its components.

System Overload

Your tankless water heater functions the best while you use only one or two taps for hot water at a time. It allows the unit to produce adequate hot water for your use. However, more taps can soon cause the system to overload.

Avoid instances where some of your family members use the shower while you are doing the laundry and another is washing the dishes. The excess stress on the tankless water heater may lead the machine to stop working suddenly.


You can reduce the demand by not using hot water applications simultaneously. If the issue occurs daily, you may require another unit. Or purchase one with a larger capacity.

Does the issue occur only occasionally? Then, you can turn the taps off and allow the unit to recover. However, when it does not reset by itself, you have to reset it manually. If you suspect that the overload caused any internal damages, call a water heater repair service for a professional inspection.

Exhaust or Air Supply Blockage

The unit requires a proper venting system for exhaust and fresh air flow for combustion. Any blockage due to the accumulation of debris or dust can cause issues with the internal components.

In extreme cases, it can be hazardous as well. For example, a blockage in the air supply may lead to ignition problems. Meanwhile, a build-up in the vents causes overheating or bacterial formation.


Fortunately, most units display an error code to indicate the blockage. Switch off the device and check if the vent pipes are correctly connected. Additionally, ensure that the machine is not very close to objects that may block the air supply.

Call a tankless water heater repair service to clear the blockage. Professionals will also advise you if it is necessary to change the device’s location for a better air supply.


Overheating of the tankless water heater also leads to many problems. It consumes excess energy and may break the device.

Identifying the cause is essential to resolve the issue. Generally, the system overheats if:

  • There is excess stress on the machine due to overuse.
  • You set the device with a higher water temperature.
  • The temperature sensors are faulty.
  • Internal components are malfunctioning.
  • A blockage occurs within the machine.


If the water temperature setting is too high, reduce it to the recommended levels. You may find the appropriate levels in the manual. Blockages require a thorough cleaning. Meanwhile, faulty elements call for a tankless water heater repair.

However, it is tricky to identify the exact cause of overheating. Call a professional plumber for an inspection. They can quickly determine the issue and resolve it accordingly.


Generally, tankless water heaters do not easily rust as they heat water only when you require it. However, it is not entirely impossible. Corrosion may primarily occur around its gas burner. It may lead to a hazardous gas leak or a blockage.

The heat exchanger is another vulnerable element that may suffer corrosion. It causes the device to overheat.


Call a tankless water heater repair service to replace the affected parts. They can re-install better components that are less likely to corrode.

Let the Professionals Handle the Job

Is your device facing any of the above issues? Then, you have to repair it at the earliest to avoid further trouble. You can entrust the task to a reliable tankless water heater repair service in Irving, TX. Call bluefrog Plumbing + Drain of North Dallas today for evaluation and repairs.

We offer efficient and timely plumbing. Our licensed and experienced professionals are available 24/7 to attend to your needs promptly. In addition, you receive guaranteed, high-quality repair service at affordable rates.

Give us a call at 469-573-2535 to book an appointment. You can also visit our website to know more about our tankless water heater repair expertise and services.

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