Troubleshooting A Tankless Water Heater: Four Common Issues And Solutions

Construction & Contractors Blog

Many homeowners eventually make the upgrade to a tankless water heater because they are efficient and take up less space. Unfortunately, many homeowners believe the misconception that they are impervious to issues, and that they offer an endless stream of hot water. Although tankless hot water heaters are better than the traditional kind, they still have problems, many of which are exclusive to the tankless design.

If you are noticing that your tankless hot water heater is no longer functioning properly, it's time to assess the issue and call in reinforcements.

Here are four common problems associated with tankless hot water heaters and solutions for fixing them:

1. The Unit Isn't Producing Any Hot Water

The most common problem with hot water heaters—even the tankless variety—is that they no longer produce hot water. There are several possible causes for this including:

  • No power
  • No flame
  • Obstruction

If your hot water heater isn't producing any hot water, check to ensure that all the lights are on and the unit is receiving power. If the unit does have power, ensure that there are no error codes present. You should also ensure that the water tap is open and that the unit is not obstructed. If is it winter time, be sure to check that the pipes aren't frozen.

2. The Water Is Scalding Hot

Another common problem homeowners encounter is that the hot water is too hot. Common causes for this include:

  • Obstructions
  • Thermostat temperature
  • Dirty fixtures
  • Broken Sensors

If your unit is producing water that is too hot to use, make sure that the thermostat is set to an appropriate temperature. Most manufacturers recommend setting the unit at 140-degrees; however, this often produces scalding hot water. To lower the temperature, adjust the thermostat to 120-130-degrees. If the thermostat is set at the right temperature, make sure that nothing has blocked the water from flowing. A clog can easily cause small amounts of water to reach very hot temperatures. Lastly, make sure that the sensors are working properly.

3. The Water Is Lukewarm

On the other hand, you may experience water that is not hot enough. Issues that may cause this problem include:

  • Thermostat temperature
  • Obstructions
  • Plumbing crossover
  • Venting system issues

If your unit is producing lukewarm water, make sure that the water temperature is set to at least 120-degrees. You can try moving the temperature up to 130-degrees, while ensuring that the valves are not broken or crisscrossed, which can cause cold water to release when the hot water is turned on. Be sure to look for clogs, damages, and sediment buildup around the pipes and the venting system.

4. The Unit Is Loud

Another common issue that you may encounter is a loud unit. Issues that may cause this happen include:

  • Debris buildup
  • Leaky seals
  • Unstable flames

If your unit is producing loud noises, check to ensure there is no debris or buildup in the fan. You may also want to ensure that the burner is functioning properly and is stable. If that does not eliminate the noise, ensure that there aren't any leaky seals in the unit.

Troubleshooting these four common issues with a tankless water heater may seem easy, but are often difficult. If you cannot solve these issues on your own, don't hesitate to contact a water heater repair personnel for tips, and help.



25 November 2014

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During construction, parts of your home might be completely torn apart, which is why it is crucial to do what you can to protect your place. One of the best tips I've ever heard in terms of preparing for a renovation is meeting with your contractor to discuss how the job will impact your daily life. I wanted to make a blog all about protecting your home and family during construction, because the process is usually more involved than most people realize. Read these helpful posts to make your next construction project simple, clean, and safe. It could help you to make your house feel like a home, even during the hard times.