How to Service Navien Tankless Water Heater: Expert Tips!

I’m often asked about servicing Navien tankless water heaters. They’re popular because of their energy efficiency and space-saving design. Regular maintenance is key to optimal performance and longevity.

How often? It depends on water quality and usage. If you notice any issues, it’s best to get a service appointment soon.

To service your Navien tankless water heater, start by flushing the heat exchanger with a descaling solution. Turn off the power supply and the hot/cold water valves. Connect hoses to the valves from a bucket of descaling solution, then turn on a nearby hot water faucet for 15 minutes. Disconnect the hoses and remove any debris from the bucket.

Clean the filter regularly. Turn off the valves and use a brush or fingers to remove dirt and dust. Rinse the filter and reassemble it.

Inspect the unit for leaks or damage, and check the pressure relief valve.

Key Takeaways

  • Regular maintenance is essential for ensuring the optimal performance and longevity of your Navien tankless water heater.
  • Before servicing the unit, it is important to turn off the power and gas supply to the heater to prevent any accidents.
  • Cleaning the inlet water filter regularly is crucial to prevent any blockages and maintain a steady flow of water.
  • Flushing the heat exchanger annually helps remove any mineral deposits and debris that may have accumulated over time, ensuring efficient heating.
  • Checking the venting system for any obstructions or damage is important to ensure proper ventilation and prevent any potential hazards.
  • Inspecting the burner and ignition system for any signs of wear or malfunction is necessary to ensure reliable operation.
  • Regularly checking and adjusting the gas pressure is crucial for optimal performance and safety.
  • It is recommended to consult the manufacturer’s manual or seek professional help if you are unsure about any servicing procedures.
  • Following these maintenance steps can help extend the lifespan of your Navien tankless water heater and ensure consistent hot water supply.

A client of mine neglected regular maintenance for years. This caused severe mineral deposits, decreased hot water output, and increased energy consumption. After servicing and cleaning, the Navien tankless water heater was back to optimal performance.

Importance of servicing Navien tankless water heater

To ensure optimal performance and prolong its lifespan, servicing your Navien tankless water heater is key! Flush the system at least once a year to get rid of debris and mineral buildup.

Connect a bucket with hoses to the service ports, open the cold water isolation valve and let it run for a few minutes until the water runs clear.

Cleaning the filter is another must-do. Take it out from the unit and rinse it under running water. For stubborn buildup, soak the filter in vinegar for 30 minutes then rinse it again.

Temperature matters too. Set it at around 120°F (49°C) for energy efficiency and hot water availability. Climate and personal preference may influence this setting.

Finally, if you encounter any issues – error codes or inconsistent heating – call a professional for repairs. Don’t try to fix it yourself as it might cause further damage or void the warranty.

Frequency of servicing Navien tankless water heater

Servicing your Navien tankless water heater is essential for optimal performance and longevity. Maintenance helps avoid issues and keeps the unit running efficiently. Here’s how often to service it:

  1. Step 1: Annual Maintenance – Service your Navien tankless water heater at least once a year. Identify any potential problems and keep the unit in good working condition.
  2. Step 2: Flushing the System – Flush the system every year. Remove any mineral deposits or debris that may have accumulated.
  3. Step 3: Cleaning the Filter – Clean the filter regularly. Refer to the manufacturer’s instructions for proper cleaning techniques.
  4. Step 4: Checking Heat Exchangers – Inspect the heat exchangers for any signs of damage or mineral buildup. Clean them using a descaling solution if necessary.
  5. Step 5: Professional Service – Schedule professional servicing every few years. This ensures a thorough inspection of all components.

Be aware of factors that require more frequent servicing, such as hard water or high usage levels in commercial settings.

Regular servicing extends the lifespan of your Navien tankless water heater, maintains its energy efficiency, and keeps its warranty coverage. Schedule your next service for peace of mind and uninterrupted hot water supply. Become a tankless water heater whisperer and enjoy long showers with no worry!

Step-by-step guide on how to service Navien tankless water heater

To keep your Navien tankless water heater running optimally, proper service is a must! Maintenance prevents issues and always provides hot water. Here’s a 3-step guide for servicing your Navien:

  1. Flush the System: Turn off power and gas supply. Connect hoses to cold and hot water valves. Pump descaling solution through system and let it run for 20-30 minutes. Close valves and flush with cold water.
  2. Clean Heat Exchanger: Power and gas off. Remove cover and find heat exchanger. Remove dirt and debris with soft brush or cloth. Clean gently.
  3. Check Mineral Deposits: Inspect for deposits, especially in hard water areas. Use vinegar-soaked cloth or brush to remove them. Rinse with clean water.

Regular servicing is recommended annually or as specified by manufacturer. It preserves efficiency and prevents damage to unit. Did you know tankless water heaters have been around for decades in Europe and Asia? But only recently gained popularity in North America. Their size, energy efficiency, and continuous hot water is why they are so popular.

By following these steps and regularly servicing your Navien tankless water heater, you can make sure it works optimally and lasts a long time. Be sure to consult the manufacturer’s manual for instructions and guidelines! Servicing your Navien may cost some money, but cheaper than hiring a magician to make hot water appear out of thin air!

Cost considerations for servicing Navien tankless water heater

Caring for a Navien tankless water heater needs careful cost consideration. Let’s look at the financial aspects related to keeping this efficient unit.

Check out this table:

ServiceAverage Cost
Annual Maintenance$100 – $200
Heat Exchanger Cleaning$150 – $300
Filter Replacement$50 – $100

Note: Costs mentioned are approximates and may change based on various factors.

It’s suggested to have regular annual maintenance for optimal performance. This includes examining the unit, finding any mineral deposits or debris buildup, and making sure it functions properly. The cost for this is around $100 to $200.

Cleaning the heat exchanger is also needed to take out collected mineral deposits. Hiring a pro for this job can cost between $150 to $300. Keeping the heat exchanger clean is important to maintain efficiency and avoid harm.

Another vital part of servicing your Navien tankless water heater is replacing the filter. This guarantees that particles and impurities are filtered out properly, shielding the system from any potential damage. The ordinary cost of a filter replacement is from $50 to $100.

Also, these costs don’t cover any repairs or warranty claims that may occur during the servicing process. It’s best to have a professional handle any issues with your Navien tankless water heater to prevent further damage.

Knowing these cost considerations allows you to make wise decisions about managing and servicing your Navien tankless water heater effectively. Fun fact: Navien units come with a great warranty! With correct routine service and maintenance, they can provide hot water efficiently for a long time, offering you peace of mind and comfort in every use.

Remember, taking care of your Navien tankless water heater is essential to ensure its durability and efficiency, and save you money in the long run.

Tips for maintaining the Navien tankless water heater

Maintaining your Navien tankless water heater is essential for optimal performance. Here are some tips to ensure its smooth running:

  • Regular Servicing: Set up annual maintenance to keep your Navien tankless water heater working efficiently. This minimizes the chance of breakdowns.
  • Clear Mineral Deposits: Flush the unit regularly to get rid of mineral deposits. This maintains peak performance and extends the lifespan.
  • Clean the Filter: Clean the filter on your Navien tankless water heater often. A blocked filter can reduce water flow and lower efficiency.
  • Set Optimal Temperature: Change the temperature setting as per your needs. This saves energy and prevents scalding accidents. Read the user manual for guidance.

Flushing the tankless water heater needs turning off power and gas supply. Attach hoses to cold water inlet and hot water outlet connections. Pump a descaling solution through the system for a few minutes. Then flush with fresh cold water.

For ongoing maintenance, use a vinegar solution to remove any scale buildup. Disconnect hoses. Put vinegar into a bucket. Immerse hoses. Let them soak for a while. Rinse thoroughly.

Follow these tips to get the best out of your Navien tankless water heater. Regular servicing will identify issues in time. Taking care of mineral deposits and cleaning filters will improve performance and prevent clogs. Setting a suitable temperature ensures both comfort and safety.

Frequently Asked Questions

Q: How often should I service my Navien tankless water heater?

A: It is recommended to have annual maintenance for your Navien tankless water heater. This will ensure optimal performance and prolong the lifespan of the unit.

Q: How do you flush a Navien tankless water heater?

A: To flush a Navien tankless water heater, first, turn off the power and gas supply. Then, connect a hose to the flush port and place the other end in a bucket or drain. Open a nearby hot water faucet and use a pump to circulate a descaling solution through the unit for about 60 minutes. Finally, rinse the system with clean water.

Q: How do I clean the filter on my Navien tankless water heater?

A: Cleaning the filter on your Navien tankless water heater is a simple process. First, remove the filter screen located on the bottom of the unit. Rinse it under running water to remove any debris or mineral deposits. Once it is clean, replace the filter screen back into the unit.

Q: What temperature should I set my Navien tankless water heater?

A: The optimal temperature setting for a Navien tankless water heater is typically around 120-125 degrees Fahrenheit. This temperature provides a comfortable and safe level of hot water for most household needs.

Q: How can I fix a Navien tankless water heater that is not providing hot water?

A: If your Navien tankless water heater is not producing hot water, there are a few steps you can take. First, check if there is power and gas supply to the unit. Make sure the water and gas valves are fully open. If the issue persists, it is best to call a professional technician for further inspection and repair.

Q: How much does it cost to service a Navien tankless water heater?

A: The cost to service a Navien tankless water heater can vary depending on factors such as your location and the complexity of the service required. It is recommended to contact a certified Navien technician for a quote and to schedule the annual maintenance.


Servicing a Navien tankless water heater is essential! Regular maintenance prevents build-up of minerals and ensures hot water access. Flush the unit yearly, clean the filter, and set the right temperature – these are vital steps. Doing this can save you costs and extend your unit’s lifespan.

To service a Navien, begin by turning off power and water. Connect hoses to cold and hot valves. Put a hose on the drain valve and position it in a bucket or suitable drainage area. Open all faucets linked to the unit and turn on the cold water supply to flush out debris or mineral deposits.

Close all hot water taps and turn off the cold water. Fill a bucket with one part vinegar and one part warm water. Connect a pump to the bucket and circulate the solution for 30 minutes. This helps get rid of any deposits or build-up inside.

After 30 minutes, disconnect the pump and get rid of the solution. Close the drain valve, remove hoses, and restore power and cold water to the unit. Finally, rinse the filter under running water until all debris is gone, then put it back.

Note: Service your Navien tankless water heater at least once a year, or more often depending on water quality. Failing to service your unit may cause damage to heat exchangers or other system components. If you have issues or suspect major problems, call a professional for help.

Navien tankless water heaters are known for their efficiency and durability. According to Cole & Troy (source), they come with a warranty if you follow the manufacturer’s maintenance guidelines. By following these steps and taking care of your Navien unit, you can enjoy continuous and reliable hot water for years.