If you’re considering switching to a tankless water heater, you’re in great company. More and more homeowners are opting to move thanks to the promise of endless hot water, lower energy costs, and systems that take up far less space than traditional water tanks. But like any appliance, a tankless water heater works best when you pay regular attention.
From simple upkeep tips to common tankless water heater issues you might run into, this beginner’s guide covers everything you need to know about tankless water heater maintenance. With a bit of preventative care, you’ll keep your system running efficiently and avoid bigger tankless water heater problems down the road.
What to Know About Tankless Water Heater Maintenance
A tankless system heats water on demand instead of storing it in a large tank, which makes it far more energy-efficient. What that also means, however, is it’s more sensitive to buildup from minerals in your water, especially if you live in an area known for hard water.
Over time, those minerals (mainly calcium and magnesium) can settle inside your unit, coating the heating elements and slowing down its performance. When left unchecked, that buildup can cause your system to overheat, shut down unexpectedly, or even spring a leak. With regular tankless water heater maintenance, you can keep those problems from taking hold and help your unit last longer while running at peak efficiency.
Simple Tankless Water Heater Maintenance Tasks
All it takes is care and attention to keep your tankless water heater in good shape. Here are a few routine tasks that can make a big difference for your system.
1. Flush and Descale at Least Once a Year
Mineral buildup is one of the most common causes of tankless water heater issues. By flushing your system once a year (or every six months if you have very hard water), you’ll help to remove that buildup before it causes real damage. This process involves connecting hoses to your unit’s service valves and circulating a descaling solution (white vinegar works great) through the system for about an hour. If that sounds intimidating, don’t worry. Most HVAC and plumbing companies, including Silver State, offer professional tankless water heater maintenance services that handle this for you.
2. Clean the In-Line Water Filter
Your water heater has a small filter designed to catch sediment and prevent debris from entering your system. Every few months, you’ll want to locate that filter (usually near the cold water inlet), remove it, rinse it under running water, and reinstall it. It’s a simple tankless water heater maintenance task to keep your water flow strong and your unit protected.
3. Inspect the Vent System
Because tankless water heaters produce exhaust gases, proper venting is essential for keeping you and your family safe. Once a year, check your vent pipes for any cracks, corrosion, or loose fittings. You’ll also want to ensure no blockages or obstructions outside your home. If anything looks off, play it safe and call a professional to make repairs right away, as this is one part of the system you don’t want to take any chances with.
4. Check Temperature & Pressure Settings
Most tankless units give you the ability to adjust the water temperature. You’ll want to keep it at or below 120°F, as it’ll help prevent scalding and reduce scale buildup inside the system. It’s also worth testing the pressure relief valve every so often. Simply place a bucket underneath, lift the lever, and ensure water flows briefly before stopping. If it doesn’t, you’ll need to have it replaced. This valve is an important safety feature that helps prevent tankless water heater problems before they start.
Common Tankless Water Heater Issues and How to Troubleshoot Them
Eventually, you may encounter a few common tankless water heater issues even with regular care. Here’s what you should look out for:
- Fluctuating water temperature: Any sudden changes in water temperature can signify mineral buildup. Try flushing and descaling the unit, and check your flow rate, as it may be too low.
- Low water pressure: You’ll first want to try cleaning your in-line water filter and looking for any kinks or leaks in your water lines. If that doesn’t help, it’s possible that scale buildup could be restricting water flow inside your heater.
- Your system shuts off mid-use: This can happen if your vent is blocked, the gas supply is low, or the sensors are dirty. It’s essential to make sure your venting is clear, and if the issue persists, it’s best to contact a technician to take a look.
If you ever see an error code on your system’s display, check your manual for the meaning. Your manual can help point you in the right direction for troubleshooting.
Keep Your Hot Water Flowing
Your tankless water heater is one of the most efficient systems in your home, but it needs regular care to stay that way. A little attention once or twice a year can prevent expensive tankless water heater problems and extend the life of your unit by several years.
If you’re not comfortable tackling maintenance yourself, that’s perfectly fine. We find most homeowners prefer to have a professional handle it. Our team at Silver State offers complete tankless water heater maintenance and repair services to keep your system running smoothly. Whether installing your first tankless unit or maintaining one you’ve had for years, we’re here to help you enjoy reliable hot water daily. Contact us today to book your appointment.
