ERM Plumbing & Heating

November 1, 2023

When the comforting flow of hot water suddenly comes to a halt in your home, it's not just an inconvenience; it's a call for action. Tankless water heaters have become a popular choice for their efficiency, but even these marvels of modern technology can experience hiccups. Below are some common issues associated with tankless water heaters and how to troubleshoot them:

Why Would a Tankless Water Heater Stop Working?

Tankless water heaters are renowned for their efficiency and longevity, but like any appliance, they can encounter issues that cause them to stop working. Several factors can contribute to this, including:

  • Mineral buildup: Over time, mineral deposits can accumulate within the heater's heating element, hindering its ability to produce hot water efficiently.
  • Gas supply problems: If you have a gas-powered unit, issues with the gas supply, such as a gas leak or a malfunctioning gas valve, can lead to heating problems.
  • Ventilation issues: Adequate ventilation is crucial for proper combustion in gas tankless heaters. A blocked vent or exhaust can result in shutdowns.
  • Water Flow Interruptions: Tankless heaters require a consistent flow of water to operate. Any disruption in water flow, such as a closed valve or a water leak, can trigger a shutdown.

Understanding why your tankless water heater stopped working is the first step in finding a solution.

How Do I Know If My Water Heater is Clogged?

A clogged tankless water heater can lead to reduced efficiency and performance issues. Signs of a clog include:

  • Reduced hot water output: If you notice a decrease in hot water flow or if the water suddenly turns cold during use, it may indicate a clog.
  • Fluctuating temperature: Inconsistent water temperature, where it varies from hot to cold, is another sign of potential blockages.
  • Error codes: Many tankless heaters display error codes when they detect issues like clogs. Refer to the manufacturer's manual to interpret these codes.
  • Strange noises: Unusual noises like popping or crackling may indicate the presence of sediment buildup within the unit.

What Is The Most Common Issue With Tankless Water Heaters?

The most common issue with tankless water heaters is mineral buildup, particularly in areas with hard water. Minerals like calcium and magnesium can accumulate within the heating element and pipes, reducing efficiency and causing performance problems. Regular maintenance and descaling are essential to address this common issue and ensure your tankless water heater functions optimally.

How Do I Reset My Tankless Water Heater?

Tankless water heaters may need to be reset occasionally to resolve minor issues or error codes. The process can vary depending on the make and model of your heater. Typically, it involves:

  • Turning off power: Switch off the power supply to the heater.
  • Waiting: Allow the unit to sit without power for a few minutes.
  • Restarting: Turn the power back on and follow the manufacturer's instructions for resetting the unit, which may include pressing specific buttons or adjusting settings.

If you're unsure about the reset process, consult your heater's manual or contact a professional technician for guidance.

Understanding these common issues and solutions can help you troubleshoot problems with your tankless water heater and ensure a reliable supply of hot water in your home.

Your comfort and convenience are paramount to us at ERM Plumbing & Heating. If you've tried these solutions and your tankless water heater is still giving you trouble, don't hesitate to reach out to our expert team. We specialize in diagnosing and repairing all types of heating and plumbing systems, including tankless water heaters. Whether you need maintenance, repairs, or a new installation, we've got you covered.

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