Why Tankless Water Heaters Need Regular Maintenance

Tankless water heaters are becoming a favorite for homeowners who want energy efficiency and endless hot water. Many assume these systems are maintenance-free, but that’s not the case. Without regular tankless water heater maintenance, you risk scale buildup, efficiency loss, costly repairs, and even premature replacement. Just like your car needs oil changes, your tankless unit needs upkeep to keep running efficiently.

Why is Tankless Hot Water Heater Maintenance Essential?

Tankless systems can be 24%–34% more energy efficient than traditional water heaters when properly cared for. Skipping annual maintenance quickly erodes these savings and creates bigger issues:

• Scale Buildup: Hard water minerals collect inside heating elements and pipes. Left unchecked, this reduces water flow and makes your heater work harder.
• Efficiency Loss: A neglected unit burns more energy, causing higher bills while producing less hot water.
• Shortened Lifespan: Ignoring annual tankless water heater maintenance can cut years off your system’s life, leading to a $2,000–$4,000 replacement sooner than expected.
• Warranty Protection: Manufacturers, including Navien, require yearly service according to their maintenance guidelines to keep warranties valid.
• Home Value: A well-maintained system boosts property value, while a neglected one can scare off buyers and become a liability.

Regular upkeep keeps your investment reliable, efficient, and long-lasting.

Tankless Water Heater Maintenance Checklist

Want to keep your system running like new? Follow this simple checklist:

• Flush the Unit: Use vinegar or a descaling solution annually to remove mineral deposits. Hard water areas may need it more often.
• Clean the Filter: Check and rinse the inlet filter to prevent restricted flow.
• Inspect Venting & Exhaust: Clogged or damaged vents can create safety hazards and reduce efficiency.
• Check Pressure Relief Valve: Make sure it’s functioning to avoid dangerous pressure buildup.
• Wipe the Exterior & Ensure Airflow: Remove dust and debris around the system.
• Test Operation: Run hot water afterward to confirm everything is working smoothly.

Doing this once a year makes a huge difference. If you’d rather skip the hassle, consider signing up for one of our Water Heater Protection Plans. It’s the easiest way to guarantee long-term performance, fewer breakdowns, and lower energy bills.

Tankless Water Heater Maintenance Cost

Many homeowners wonder if maintenance is worth it. Here’s the breakdown:

• DIY vs Professional: Flushing at home costs $30–$50 for hoses and descaler. Professional service runs $150–$300, depending on brand and location.
• Annual Cost vs Replacement: Spending a few hundred dollars a year is much cheaper than a premature $2,000–$4,000 replacement.
• Long-Term Savings: Regular upkeep means lower monthly energy bills.
• Warranty Considerations: Skip professional service, and you risk voiding your warranty, leading to higher long-term costs.

Maintenance is a small investment for huge long-term savings.

Tankless Water Heater Maintenance Tips

Want to get the most out of your system? Use these simple tips:

• Use a Water Softener: In hard water areas, this reduces mineral buildup. See our water softener services.
• Check the User Manual: Follow brand-specific instructions such as Navien’s tankless water heater maintenance requirements.
• Don’t Ignore Warning Lights: Error codes, strange noises, or inconsistent water flow are red flags.
• Go for a Tankless Water Heater Booster: A tankless water heater booster reduces strain on the system and ensures a consistent hot water supply.
• Document Maintenance: Keep records for warranty coverage and potential resale value.
• Be Proactive, Not Reactive: Small efforts now prevent costly breakdowns later.
• Hire a Professional: While you can handle the basics, scheduling service with a tankless water heater maintenance company ensures a thorough inspection and long-term peace of mind.

Hire Trusted Pros for Superior Tankless Maintenance Solutions

At Horizon Plumbing, our certified, licensed, and insured plumbers bring years of experience to every job. Whether you need quick repairs, an inspection, or full maintenance, we’ve got you covered. We also install tankless water heater boosters to extend efficiency and lifespan, and we offer smart plumbing upgrades that save water while protecting your home. 

Our customer-first approach means fast response times, friendly service, and no unnecessary upsells, just transparent pricing and smart plumbing upgrades that protect your home. Call us at (817) 461-1117 or contact us today to schedule your service.