Post By Admin
April 21, 2025Imagine stepping into the shower and being greeted by endless, perfectly warm water—pure bliss, right?
But when your tankless water heater isn’t properly maintained, that comfort can quickly turn cold.
That’s why you need regular maintenance on your tankless water heater to keep your hot water running smoothly and your showers steamy.
Want to know how? Check out this quick guide!
Basic Maintenance Tips for Tankless Water Heater
Follow these easy tips to make tankless hot water heater maintenance a breeze:
1. Flush the System Regularly
Over time, minerals—especially calcium—can build up inside your unit, which will reduce efficiency and possibly cause damage.
So, you need to flush the water heater regularly to maintain consistent water temperature and flow.
How to do it:
- Turn off the power and water supply to the unit.
- Close the hot and cold water valves.
- Attach hoses to the service valves and place the other ends into a bucket filled with white vinegar.
- Open the service valves and run a submersible pump to circulate the vinegar through the system for about 45 minutes.
- Close the valves, remove the hoses, and open the main valves again.
- Turn the power and water supply back on.
2. Clean the Inlet Filter
Dirt and debris can clog the filter, restricting water flow and making your hot water go cold quickly. To avoid this issue, you should clean the inlet filter:
How to do it:
- Turn off the water supply to your heater.
- Locate the cold water inlet filter—usually found near the bottom of the unit.
- Unscrew the filter and remove any visible debris.
- Rinse the filter under clean water and screw it back into place.
- Turn the water supply back on.
3. Inspect the Venting and Air Supply
Good airflow is key to safe and efficient operation. Knowing how your water heater works can help you understand why blockages in the vents can be dangerous.
Hence, you need to inspect the venting and air supply in the system as well:
How to do it:
- Turn off the heater and let it cool down.
- Check the intake and exhaust vents for any obstructions like dust, leaves, or animal nests.
- Make sure all vent connections are tight and corrosion-free.
- Clear any blockages carefully and wipe down the area to keep airflow steady.
4. Check for Error Codes
Most units display error messages when something isn’t right. These early warnings can help you fix minor problems before they become costly.
How to do it:
- Look at your unit’s digital display for any error codes.
- Refer to the user manual to understand what each code means.
- Follow the recommended troubleshooting steps or contact a professional if needed.
- Reset the unit once the issue is resolved.
5. Schedule a Yearly Pro Inspection
Some issues aren’t visible to the untrained eye. An expert can spot wear and tear early, perform advanced maintenance on tankless water heater components, and help extend the system’s lifespan.
How to do it:
- Contact a licensed plumber or hot water specialist.
- Schedule an annual inspection (ideally before winter).
- Ask them to check internal parts, burner performance, and safety controls.
- Keep a record of each visit for warranty and service tracking.
Now, you might be wondering, can you actually maintain your water heater by yourself? Let’s discuss further.
Can You Maintain a Tankless Water Heater by Yourself?
Yes, you can maintain a tankless water heater on your own—at least the basic tasks like flushing the system, cleaning filters, and checking for obvious signs of wear.
With a little time and the right instructions, many homeowners can handle simple maintenance and keep things running smoothly.
However, while DIY can save you a few bucks upfront, it’s not always the safest or most effective route—especially if you’re not confident around plumbing or electrical components.
That’s where calling in a professional makes a lot of sense.
Plumbers who specialise in servicing hot water system setups have the tools and experience to do a thorough check.
They can spot early signs of corrosion, valve issues, or buildup in areas you might miss. Plus, they’ll make sure everything complies with local safety codes.
So yes, you can roll up your sleeves for the simple stuff—but when in doubt, or for a yearly check-up, it’s always smart to call the pros.
FAQ about Tankless Water Heater Maintenance
1. What happens if you don’t service your tankless water heater?
Over time, mineral buildup and debris reduce efficiency, cause inconsistent water temperature, or even damage the unit. In the end, it leads to costly repairs or replacements which everyone doesn’t like.
2. How often should you flush a tankless water heater?
Flushing once every 6 to 12 months is ideal, depending on your water hardness and usage. The more frequent the usage, ideally you need to flush it more as well.
3. How long does it take to service a tankless water heater?
A typical service takes about 1 to 2 hours. It may be quicker for simple maintenance or longer if deeper cleaning or repairs are needed.
Conclusion
Taking care of your system with regular tankless water heater maintenance helps you enjoy reliable hot water whenever you need it.
While there’s plenty you can do on your own, it’s still wise to call in a professional to avoid high risk and faulty maintenance.
Now, you only need to call Neighbourhood Plumbing as we’re experts in this field. Sit back and relax while we are doing our job in no time!
About the Author
From unclogging the toughest drains to repairing leaking toilets, Ricky is a seasoned plumber who has brought his craftmanship to homes across Melbourne. He is passionate about sharing plumbing tips just as much as he is about fixing your plumbing issues. So, when your taps or pipes begin leaking, you know who to call.
