Learn how to perform basic maintenance in this tankless water heater guide including descaling your unit and cleaning the air filter.

As a homeowner, you know how important it is to manage your property’s maintenance needs, one of which is your plumbing system. Tankless water heaters have become increasingly popular due to their efficiency and cost-effectiveness. However, just like any other household appliance, they need proper care to function optimally. Read on to discover your essential tankless maintenance guide to cut down plumbing costs and prolong the life of your water heater.

Understanding The Importance of Regular Maintenance

Don’t let the term “maintenance” fool you into thinking it’s merely about keeping your unit squeaky clean. Regular upkeep of your tankless water heater plays a critical role in the overall longevity and functionality of the system. It’s not merely a cost-saving strategy but a necessity that pays off in multiple ways.

Consider this: little problems have a sneaky habit of growing into big headaches when left unchecked. Regular maintenance acts as a preemptive strike, nipping minor issues in the bud before they escalate into expensive repairs or, worse, total breakdowns. The financial implications of such scenarios are far from pocket-friendly, making prevention a far wiser course of action.

Efficiency, too, factors heavily into the equation. When your tankless water heater hums along smoothly, it consumes less energy, which directly translates into lower utility bills for you. Plus, an efficient system consistently delivers hot water at your command, never leaving you high and dry in the middle of a shower on a frosty morning.

But the benefits of regular maintenance don’t stop at financial savings or optimal performance. By diligently taking care of your tankless water heater, you’re essentially adding years to its service life. Think of it as an investment in your comfort and peace of mind, knowing that your reliable source of hot water won’t be throwing in the towel anytime soon.

As you can see, the importance of regular tankless maintenance extends beyond the basic notion of cleaning and upkeep. It’s about financial savings, energy efficiency, reliable performance, and longevity. So, let’s roll up our sleeves and dive into the world of tankless water heater maintenance!

Identifying Signs of Potential Problems

The first step in mastering the art of tankless water heater maintenance is knowing how to spot potential issues early on. Catching a problem in its infancy stage not only saves you from the hassle of dealing with a full-blown breakdown but also saves you a pretty penny in repair costs. Here’s what you need to keep an eye (and ear!) out for.

Does the water temperature in your shower go from scorching hot to icy cold without any warning? Is the water pressure from your faucets not as strong as it used to be? These could be telltale signs that your tankless water heater is calling for help.

Also, keep your ears peeled for any unusual noises emanating from your heater. If it’s grumbling, whining, or making any other sounds it shouldn’t, it could be an indication that something’s awry.

Let’s not forget about the system’s erratic behavior. If your heater is shutting down unexpectedly, or if you notice an unexplained increase in your energy bills, there could be underlying issues with your tankless system that need immediate attention.

While these signs might seem worrying, remember that early detection is half the battle won. Keeping a close watch on your tankless water heater’s performance can help you identify potential issues before they spiral out of control, giving you ample time to arrange for professional assistance.

tankless maintenance guide

Scheduling Regular Professional Inspections

No matter how meticulously you care for your tankless water heater, there’s no substitute for the keen eye and expert hand of a skilled plumber. Inspections by seasoned professionals aren’t just a cursory glance at your system but a comprehensive examination designed to catch hidden issues that may have flown under your radar.

Let’s put it this way – it’s the difference between looking at the night sky with a naked eye versus a high-powered telescope. While you may see a sprinkling of stars and maybe even spot the odd planet with the naked eye, a telescope allows you to discover galaxies far, far away. Similarly, an expert’s knowledge and tools can delve deep into your system, shedding light on issues invisible to the untrained eye.

Professional inspections should ideally include a deep cleaning session to remove the scale buildup that can interfere with your heater’s performance. If you think about it, the internal components of your tankless heater are constantly working in a hot, water-filled environment. Over time, this can lead to the formation of mineral deposits or “scale”, which can affect the efficiency of your system and even cause permanent damage if left unchecked.

The good news is, you don’t need to schedule professional inspections too often. An annual visit should suffice in most cases. Of course, if your heater has been acting up or showing signs of potential issues, don’t hesitate to call in the experts sooner.

And while we’re on the subject, let’s not forget about the post-inspection report. A professional plumber should provide you with a detailed report highlighting any issues found during the inspection and the steps taken to fix them. This report is not just a receipt for your payment but also a valuable piece of document that serves as proof of your diligent maintenance efforts. It might come in handy if you ever need to make a warranty claim or sell your property in the future.

Remember, a professional inspection is not an expense but an investment – an investment in the longevity of your tankless water heater and your peace of mind knowing that your reliable source of hot water is in good hands. So, make it a point to schedule regular professional inspections and give your tankless water heater the care it deserves.

Related Content: Tankless Buying Guide

Carrying Out Do-It-Yourself Maintenance Tasks

You don’t always need a professional’s touch to keep your tankless water heater humming along. There are a few simple yet essential tasks that you can do yourself to ensure your system stays in tip-top shape between professional inspections. Let’s dive into the nitty-gritty of DIY tankless water heater maintenance.

One task you can tackle is cleaning the water inlet filter. This filter helps prevent debris from entering the heater, but over time it can become blocked, hindering water flow. Regular cleaning can help prevent such blockages, thereby ensuring a smooth and efficient operation of your heater.

Flushing your system is another preventative measure that you can take on your own, especially if your water supply is hard. Hard water contains minerals that can accumulate in your heater over time, forming a layer of scale that can affect the heater’s performance. A yearly flush should suffice to keep this scale buildup at bay.

While these tasks sound simple enough, it’s important to remember that they involve dealing with electricity and hot water, which can be dangerous if not handled correctly. Always make sure to consult your heater’s manual for specific procedures and safety guidelines. It provides step-by-step instructions tailored to your specific model, making it an invaluable resource for your DIY maintenance endeavors.

If you’re unsure about any aspect of these tasks, don’t hesitate to seek professional advice. After all, your safety and the health of your heater are of paramount importance. Be it a simple question or a complex concern, a professional can provide the insight and guidance you need to carry out these tasks safely and effectively.

Don’t forget that the efforts you put into these tasks not only contribute to the upkeep of your heater but also help you gain a better understanding of how your system works. This knowledge can prove helpful in identifying potential issues early on, enabling you to seek professional help before they escalate into serious problems.

So, roll up your sleeves and put on your DIY hat! With a bit of care and precaution, you can contribute significantly to the longevity of your tankless water heater, saving on repair costs and enjoying uninterrupted access to hot water. And who knows, you might even discover a newfound appreciation for the marvel of engineering that is your tankless water heater!

Making the Most of Your Tankless Water Heater Warranty

Your tankless water heater isn’t just a piece of equipment; it’s an asset that comes with a manufacturer’s warranty. This warranty often plays a crucial role in covering costs related to specific repairs or replacements, potentially saving you a pretty penny in the long run. To truly leverage this benefit, it’s imperative to fully understand the ins and outs of your warranty’s terms and conditions.

For instance, you might discover that your warranty hinges on regular professional maintenance. To keep your warranty active, staying ahead of your maintenance schedule isn’t a mere suggestion; it’s a must-do. Skipping routine inspections might seem like a cost-saving measure in the short term, but it could end up voiding your warranty, leaving you to bear the brunt of any repair costs.

But don’t just stop at understanding the conditions – remember to retain all service records diligently. These records act as proof of your commitment to maintenance, which might be necessary to make a successful warranty claim. These documents testify to the care you’ve given your heater, a factor that could be crucial when you’re hoping to avail the benefits of your warranty.

Think of these maintenance records as your golden tickets to hassle-free warranty claims. With them, you’re not just a homeowner claiming a warranty; you’re a responsible homeowner with documented evidence of regular maintenance, ready to reap the rewards of your diligence.

So, keep a keen eye on your maintenance schedule, preserve your service records, and ensure you’re well-versed with your warranty’s terms. This way, you’re not just using your tankless unit; you’re maximizing its warranty, making the most of your investment, and saving on potential repair costs. After all, an informed homeowner is a savvy homeowner, and who wouldn’t want that?

How to Flush a Tankless Water Heater

  1. Shut the gas supply to the unit.
  2. Shut the power supply to the unit, if necessary. (See manufacturer’s guide)
  3. Shut both isolation valves and remove access port caps from each one.
  4. Attach a hose to the cold side access port from the outlet of the pump.
  5. Attach a hose to the hot side access port, with the other end emptying into the bucket.
  6. Position the pump in the bucket.
  7. Pour white vinegar (3-4 gallons), or a solution recommended by the manufacturer, into the bucket.
  8. Open the valves of the access port.
  9. Power up the pump and let it send the flushing solution into the water heater unit.
  10. Allow this pumping and flushing through the water heater unit for about 45 minutes to an hour.
  11. Shut off power to the pump and take it out of the bucket.
  12. Shut the cold side access port valve, detach the hose and put back the cap.
  13. At this point you are about to rinse out the flushing solution from the water heater unit.
  14. Ensure the hose remains attached from the hot water access port and emptying into the bucket.
  15. Gently turn on the cold water and allow it flush the unit for at least 5 minutes.
  16. Shut the valve of the hot water access port, detach the hose and put back the protecting cap.
  17. Now, turn on the hot water isolation valve.
  18. Turn on the gas. At this point, if you shut the power supply, turn it back on.

Tankless Maintenance Guide FAQ’s

What maintenance is required on a tankless water heater?

To ensure the effective functioning of your tankless water heater, minimal maintenance is required. However, it is essential to do a few maintenance tasks, like cleaning the inlet filter, air filter, and descaling the device.

How often should I flush my tankless?

Similar to tank units, tankless units require an annual flushing. Homeowners who have hard water may consider increasing the frequency of flushing and cleaning their unit, perhaps every six to nine months, due to the elevated levels of magnesium and calcium present in hard water sources.

Is vinegar or descaler better for tankless water heaters?

Both descaling solution and vinegar are effective for removing mineral deposits, calcium, and limescale from your tankless water heater. Vinegar is a cost-efficient and non-toxic alternative, however it may not be as potent as descaling treatments.

What equipment is needed to flush a tankless water heater?

Prior to proceeding, ensure that you have flush valves installed. If not, it will be necessary to engage the services of a plumber to install them. Additionally, ensure that you own a submersible pump, a 5-gallon bucket, a set of washer hoses, and approximately 3-4 gallons of vinegar (distilled white).


The family-run company at Clovis Plumbing Services is the one to call when you need a plumber in Clovis because of their affordable rates and high-quality service. We are confident in our ability to meet any plumbing need because of our extensive experience and personalized service. If you need plumbing services for any type of project, big or small, Clovis Plumbing Services is the company to call.

clovis plumbing services
Why Choose Clovis Plumbing Services?

We Focus On Getting The Job Done Right the First Time!


Clovis/Fresno Ca​

Open Hours:

Mon-Sat: 7am – 5pm

Clovis Plumbing Services
Scroll to Top