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Tankless water heaters, also known as on-demand water heaters, have become increasingly popular for their energy efficiency and ability to provide hot water instantly. However, like any home appliance, they require regular maintenance to ensure optimal performance, a long lifespan, and minimal repair costs. Read on to discover why maintenance is crucial, what you can do yourself, and when to call a professional.

Why Maintain Your On-Demand Water Heater? Regular maintenance of your system has many benefits.

1. Maximize Efficiency: Over time, sediment and mineral buildup can reduce your water heater’s efficiency, leading to higher energy bills. A clean, efficient system uses less energy, lowering your utility bills.
2. Prevent Costly Repairs: Regular maintenance helps identify and address minor issues before they become expensive repairs or replacements.
3. Extend the Lifespan: A well-maintained tankless water heater can last over 20 years, compared to only 8–12 years for traditional tank models.
4. Ensure Clean Water: Without proper maintenance, debris and mineral deposits can affect water quality and damage your plumbing system.
5. Reliable Hot Water Supply: Prevent interruptions by keeping your system in peak condition.
6. Peace of Mind: Reduce the likelihood of unexpected breakdowns, especially during high demand in colder months.

Signs Your Tankless Water Heater Needs Maintenance

Before diving into the maintenance tips, watch for these warning signs that your water heater may need attention:

• Fluctuating water temperatures
• Reduced water flow
• Strange noises (e.g., clicking or rumbling)
• Error codes or warning lights on the control panel
• Increased energy usage

If you notice any of these issues, your system is likely overdue for maintenance or repair.

DIY Maintenance Tips for Tankless Water Heaters

Performing regular maintenance yourself can save time and money. Here are the key steps:

1. Flush the System to Remove Mineral Buildup

Minerals like calcium and magnesium from hard water can accumulate in your water heater’s heat exchanger. Flushing the system removes these deposits, ensuring efficiency.

• How Often: At least once a year (or every 6 months if you have hard water).
• What You’ll Need: A submersible pump, two hoses, a bucket, white vinegar, or a descaling solution.
• Steps:
  • Turn off the power and water supply.
  • Connect the hoses to the inlet and outlet valves.
  • Use the pump to circulate vinegar through the system for about 45 minutes.
  • Rinse the system thoroughly with clean water before reconnecting it.

2. Clean the Filter

Tankless water heaters have an inlet filter that traps dirt and debris to protect the system. Over time, this filter can clog and reduce water flow.

• How Often: Check the filter every 6 months.
• Steps:
  • Turn off the water supply and remove the filter.
  • Rinse it under running water to remove debris.
  • Reinstall the filter and ensure it’s secure.

3. Inspect the Air Intake and Exhaust Vents

Proper airflow is essential for safely operating a gas tankless water heater. Blocked vents can lead to inefficient combustion or even dangerous gas buildup.

• What to Do:
  • Check for dirt, dust, or obstructions around the vents.
  • Clean the vents with a soft brush or vacuum if needed.

4. Check for Leaks

Inspect the system for any signs of water or gas leaks, particularly around the fittings and connections. Address leaks immediately to avoid further damage.

When to Call a Professional

While most homeowners can handle essential maintenance, there are times when professional help is necessary:

1. Annual Inspection: Schedule a professional service annually to inspect internal components thoroughly.
2. Error Codes or Malfunctions: If your unit displays an error code, consult the manual and contact a technician for advanced troubleshooting.
3. Corrosion or Significant Mineral Buildup: Professionals have specialized tools to descale and clean your system if the buildup is excessive.
4. Gas System Maintenance: For gas-powered units, a licensed technician should check the gas lines, burners, and safety systems.

Proactive Tips for Long-Term Maintenance

1. Install a Water Softener: Hard water is a primary culprit behind mineral buildup. A water softener can reduce scaling and extend your system’s life.
2. Use a Surge Protector: Install a surge protector to protect your water heater from power surges.
3. Set the Right Temperature: Keep the water heater’s temperature set between 120°F and 140°F. This prevents overheating and excessive wear.
4. Follow the Manufacturer’s Recommendations: Always consult the owner’s manual for maintenance guidelines specific to your model.

Your tankless water heater is an investment in convenience and energy efficiency, but it requires routine care to function at its best. By performing regular DIY maintenance, scheduling annual inspections with a professional like Hudson Home Improvement,  and taking proactive steps like installing a water softener, you can enjoy consistent hot water and extend the life of your system. Don’t wait for problems to arise—start maintaining your on-demand water heater today! Hudson Home Improvement is available to answer any questions you may have. Call us today!