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Troubleshooting Problems With Your Tankless Water Heater

Tankless water heaters are often praised for being energy efficient and having lengthy lifespans. These water heater units are incredibly convenient since they operate by heating water only when you need it. Nonetheless, your tankless water heater is still susceptible to problems that need fixing.

Here are five of the most common problems with tankless water heaters to watch for. Plus, we’ll review how to fix problems with a tankless water heater.

No Hot Water

One common problem with tankless water heaters is a lack of hot water. Do you go to turn on your sink and shower but find that there’s no hot water? First, look at your home’s water use.

If members of your household often use hot water at the same time, your water heater may not be able to provide enough hot water. You can try to fix this problem with your tankless water heater by stopping simultaneous water use.

Still having problems? Turn your home’s electrical panel. Your breaker may have tripped without you knowing. As a result, your water heater may be turned off. Look to see if your breaker needs to be reset, then try the hot water again.

Cold Water Sandwiches

You may be experiencing the problem where your water runs hot, then cold, then suddenly becomes hot again. This problem is called a “cold water sandwich.”

With a tankless water heater, a “cold water sandwich” can happen at any time. It sometimes takes time for a tankless water heater to produce hot water. When you take a shower, you’ll feel leftover hot water at first, but then you may feel cold water! Don’t worry too much—your water may just need a chance to warm up.

Don’t waste time searching for “water heater specialists near me” if you’re frustrated by cold water sandwiches and looking for a permanent solution. With years of expertise, the Bumble Bee Plumbing team knows how to fix problems with tankless water heaters.

Foul-Smelling Water

Another common problem with tankless water heaters is strange odors. More often than not, water that smells bad or has a strange color has something wrong with it. Water that smells like rotten eggs could indicate that sulfate bacteria lurks in your tank.

Discolored water—a common problem with tankless water heaters—could mean rust and minerals are building up in your water heater.

To get rid of rust, consider flushing your water heater. To remove mineral buildup, use a water softener.

Gas Burner Ignition Failure

Another common problem with tankless water heaters that you might experience is that your unit’s gas burner refuses to ignite. If you notice this issue:

  1. Check that you are using the correct type of gas (such as natural gas).
  2. Verify that the propane tank is full.
  3. Check for proper gas pressure.
  4. Confirm that your gas line is the correct size.
  5. Check that the gas valve is open.
  6. Inspect whether the water flow rate is above its required minimum.

Air Supply or Exhaust Blockage

Has your tankless water heater been showing an error code on its LCD screen? If so, there could be an air supply or exhaust blockage. This means your water heater has a problem.

Inspect your vents and air channels for debris. Then check that your vents are connected properly. If you have questions, always reach out to your local tankless water heater specialist.

Don’t hesitate to get in touch with Bumble Bee Plumbing today for assistance with your tankless water heater. Our experienced professionals specialize in tankless, gas, and electric water heaters in Phoenix, AZ. We know how to fix problems with tankless water heaters quickly and accurately. Contact us on our website or call us at your earliest convenience!

Woman trying to troubleshoot problems with her tankless water heater in her Glendale, AZ, home.
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