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Tankless Water Heater Maintenance: What You Need to Know

Home | Blog | Published on March 21st, 2025
Plumber flushing a tankless water heater to remove mineral buildup during routine maintenance.

Tankless water heaters provide energy efficiency and endless hot water, but like any appliance, they require regular maintenance to perform at their best. Without proper care, mineral buildup can reduce efficiency, cause performance issues, and lead to costly repairs.

At Swift Plumbing & Heating, we help homeowners in Bainbridge Island, WA, keep their tankless water heaters in top condition with expert maintenance services.

How Often Should You Maintain a Tankless Water Heater?

Annual Professional Inspection

Scheduling a professional inspection once a year ensures your tankless water heater is operating efficiently. A technician will check for leaks, test safety mechanisms, and clean internal components to prevent potential issues before they escalate.

Flushing the System Every 12 Months

Mineral deposits from hard water can accumulate inside the heat exchanger, reducing efficiency and increasing wear. Flushing the system annually removes these deposits and prevents scaling that could damage the unit over time.

Cleaning the Air and Water Filters

Tankless water heaters contain air and water filters that can become clogged with debris. Cleaning or replacing these filters every few months helps maintain proper water flow and ensures the system runs efficiently.

Checking the Pressure Relief Valve

The pressure relief valve prevents excessive pressure buildup, which can be a safety hazard. Testing it once a year helps ensure the system operates safely and effectively.

Benefits of Regular Tankless Water Heater Maintenance

  • Improved energy efficiency and lower utility bills
  • Extended lifespan of the unit
  • Prevention of costly repairs caused by mineral buildup
  • Consistent hot water supply without performance issues

Signs Your Tankless Water Heater Needs Maintenance

If you notice any of the following issues, it may be time to schedule a professional service appointment:

  • Fluctuating water temperature
  • Reduced hot water flow
  • Unusual noises coming from the unit
  • Error codes displayed on the control panel
  • Higher-than-usual energy bills

FAQs About Tankless Water Heater Maintenance

How long do tankless water heaters last?

With proper maintenance, tankless water heaters can last 20 years or more.

Can I flush my tankless water heater myself?

Yes, but professional flushing ensures a more thorough cleaning and reduces the risk of accidental damage.

What happens if I skip maintenance?

Neglecting maintenance can lead to scale buildup, reduced efficiency, and potential system failure, resulting in costly repairs or premature replacement.

Trust Swift Plumbing & Heating for Tankless Water Heater Maintenance

At Swift Plumbing & Heating, we provide expert tankless water heater maintenance to help homeowners in Bainbridge Island, WA, enjoy reliable hot water year-round. Our team ensures your system runs efficiently and safely, reducing the risk of unexpected failures.

Schedule Your Tankless Water Heater Maintenance Today

Keep your water heater performing at its best—schedule your maintenance service today with Swift Plumbing & Heating. Visit us at Swift Plumbing & Heating to book an appointment.

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