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Most Common Tankless Water Heater Repairs [How To Solve It?]

tankless water heater repairs

Here we will discuss the most common tankless water heater repairs. They are relatively simple, so you will be able to get them done all by yourself, but you will need a few guidelines.

Removing the deposits from the system

One of the most common repairs is done when you have to remove the deposits from the system. The most common issue is that your tankless water heater will have a decreased water flow. You will have to follow these steps.

  • 1

    Remove the cover of the tankless water heater and turn off the inlet and outlet valves. Also turn off the gas supply and the 240V circuit breaker from the unit.

  • 2

    Use a sump pump or a submersible pump and place it in a bucket filled with water and vinegar.

  • 3

    Connect one hose from the inlet valve to the pump and another from the bucket to the pressure relief valve. Run the pump for 15 minutes.

  • 4

    Turn off the pump and repeat the process with clean water. You will also want to remove the filter housing and replace the filter.

This is the entire process. As you can see, it is easy so you will be able to complete it without having to call a professional.

Replace the heating element

Another, also common issue with tankless water heaters is to replace the heating element. It is a simple process as well, but you will need some time to get it done. At the moment, all you have to know is that following the precise steps is mandatory.

  • 1

    Always check with the user manual before you start with the process. There are a lot of different models out there, so the user manual will help you locate the heating element and understand all the essentials about the particular unit.

  • 2

    Shut down and disconnect the electrical wiring.

  • 3

    Turn off water and open a faucet nearby so you drain the water from the system. Also, remove the heating element plate that is located at the bottom. It is held in place by a couple of screws. Allow for the water to drain out.

  • 4

    Disconnect the wires around the heating element. Remove the old unit and replace it with a new one. Make sure you have a right version that is used by your tankless water heater.

  • 5

    Make sure that the rubber seals are in place and they should be replaced as well.

After all of this is done, re-connect the rest of the elements and test the system. You have successfully replaced the heating element on your tankless water heater. The above steps are also applicable for under the sink heaters.

The Final Word

These are the most common tankless water heater repairs you will have to do by yourself. They are simple and they will require under an hour to be completed. There is no need to pay for a professional when you can complete these steps all by yourself. We hope that we helped you with the issue. If your water heater is too old and you are looking to replace it with a new one, check out our article on electric tankless water heaters or the gas tankless water heaters.

    Verner Ellen

    Hi, my name is Verner Ellen. I am a homebody whose interest is in getting the best home tools and equipments to help with the the everyday house chores. I also love fitness, cooking and grilling. Maintaining a clean and comfortable home is my lifelong passion.