Keep Your Tankless Water Heater Running Efficiently

Tankless Water Heater Repair &
& Maintenance in Marietta, PA

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TOP-RATED WATER HEATER SERVICE EXPERTS
IN MARIETTA, PA

A tankless water heater delivers on-demand hot water, but it requires regular maintenance and occasional repairs to stay at peak performance. Over time, issues like mineral buildup, faulty components, or sensor malfunctions can cause temperature fluctuations, reduced efficiency, or system failures.

At 717 Mechanical LLC, we specialize in tankless water heater repair and maintenance throughout Marietta, PA, and surrounding areas. With 12 years of experience, our team services leading brands like Navien and NTI, providing fast repairs, thorough maintenance, and long-term system optimization to ensure reliable hot water when you need it.

Family Owned & Operated

LOCALLY-OWNED & COMMUNITY FOCUSED

OVER A DECADE OF EXPERIENCE

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Your #1 Choice for Tankless Water Heater Repair in Marietta, PA

A malfunctioning tankless water heater can lead to inconsistent hot water, reduced efficiency, and unexpected system failures. Our expert tankless water heater repair and maintenance services keep your system running smoothly—delivering reliable, on-demand hot water throughout your Marietta home.

Common Tankless Water Heater Repairs

Our team specializes in diagnosing and repairing tankless water heaters, addressing both minor and major system failures.

Heat Exchanger Cleaning & Repairs

  • Removes mineral buildup that reduces heating efficiency.
  • Repairs or replaces a damaged heat exchanger.

Gas Burner & Ignition System Repairs

  • Fixes pilot light and ignition issues for gas models.
  • Ensures proper gas flow and burner efficiency.

Water Flow & Pressure Adjustments

  • Clears clogged filters and water flow restrictors.
  • Ensures steady and efficient water delivery.

Sensor & Control Board Troubleshooting

  • Diagnoses electrical and control panel errors.
  • Replaces faulty sensors for accurate temperature control.

Our tankless water heater repair services ensure your Navien or NTI system operates efficiently and reliably.

Preventative Maintenance for Tankless Water Heaters

Routine tankless water heater maintenance is essential to:

  • Prevent mineral buildup that reduces efficiency.
  • Improve water heating speed and performance.
  • Extend the lifespan of your unit.
  • Reduce the risk of costly breakdowns.

Essential Tankless Water Heater Maintenance Services

  • Annual System Flushing & Descaling – Removes lime scale and mineral deposits from the heat exchanger and prevents clogged water lines.
  • Filter Cleaning & Replacement – Cleans or replaces clogged inlet water filters to improve water flow.
  • Venting System Inspection – Ensures proper airflow and gas venting and checks for obstructions or leaks.
  • Gas Line & Connection Checks – Inspects gas pressure and burner efficiency for safe operation.
  • Electronic Control Panel Testing – Diagnoses error codes and faulty sensors, ensuring proper calibration.

Regular maintenance helps optimize system efficiency and prevent unexpected repair costs.

How Often Should You Service Your Tankless Water Heater?

To maintain peak performance, we recommend:

  • Annual maintenance for standard household use.
  • Semi-annual maintenance if you have hard water or high water usage.

Skipping maintenance can lead to premature breakdowns, decreased efficiency, and costly repairs.

Signs Your Tankless Water Heater Needs Repairs

Tankless water heaters are highly efficient, but they can develop issues over time. Watch for these warning signs that indicate you need professional repair service:

Fluctuating Water Temperatures

Water temperature suddenly turns cold during use.
System struggles to maintain a consistent temperature.

Low Water Pressure or Weak Hot Water Flow

Clogged filters or mineral buildup can reduce flow.
A faulty heat exchanger or gas valve may need replacement.

Water Heater Won’t Turn On

Error codes appear on the unit’s display.
No ignition for gas-powered models.

Unusual Noises During Operation

Rumbling or hissing sounds could indicate scale buildup.
Clicking or whistling noises may be caused by blockages or venting issues.

Higher Energy Bills Without Increased Usage

An inefficient system may consume more energy to heat water.
Poor performance can lead to higher gas or electricity costs.

If you're experiencing any of these issues, 717 Mechanical LLC provides fast and effective tankless water heater repairs to restore hot water efficiency in your home.

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Why Navien & NTI Tankless Water Heaters?

At 717 Mechanical LLC, we specialize in servicing and installing Navien and NTI tankless water heaters because they offer:

  • High efficiency with advanced heating technology.
  • Reliable on-demand hot water for any household size.
  • Durable stainless-steel heat exchangers for long-term performance.
  • Smart diagnostic features for easy troubleshooting.

If your Navien or NTI tankless water heater requires repairs or maintenance, we have the expertise to restore its performance.

Benefits of Professional Tankless Water Heater Repair & Maintenance

  • Restores maximum efficiency for lower energy costs.
  • Extends system lifespan and prevents premature failure.
  • Ensures clean, high-quality hot water for your home.
  • Prevents unexpected breakdowns and expensive emergency repairs.

A well-maintained tankless water heater keeps your home comfortable and energy-efficient year-round.

Service Areas for Tankless Water Heater Repair & Maintenance

We proudly serve homeowners in:

Marietta, PA

Elizabethtown

Mount Joy

Columbia

Wrightsville

Hershey

If you need tankless water heater repair or maintenance, we’re ready to help.

Call Our Team
HVAC Maintenance Plans

HVAC Maintenance Plans for Long-Term Savings

Preventative maintenance is one of the best ways to avoid costly repairs and keep your HVAC system running efficiently. Our maintenance plans include:

  • Seasonal tune-ups for heating and cooling systems
  • Priority scheduling to maintenance members
  • Discounts on parts and repairs
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Financing Options
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Financing Options to Fit Your Budget

We believe every homeowner deserves access to reliable heating and cooling solutions, which is why we offer flexible financing options. Whether you need a new installation or a repair, we work with you to find a payment plan that fits your budget.

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Frequently Asked Questions About Tankless Water Heater Repair & Maintenance

If your tankless water heater isn’t working properly, look for these common signs:
  • Fluctuating water temperatures or unexpected cold water.
  • Reduced hot water pressure or weak flow.
  • Error codes displayed on the control panel.
  • Loud rumbling, hissing, or clicking noises from the unit.
  • Unexplained high energy bills due to inefficiency.

A lack of hot water can be caused by:
  • A blocked or dirty inlet filter reducing water flow.
  • Mineral buildup in the heat exchanger, limiting efficiency.
  • A malfunctioning ignition system in gas models.
  • Low gas pressure or an electric power issue.
  • Incorrect system settings or sensor malfunctions.

Navien and NTI tankless water heaters display error codes when something is wrong. Common codes include:
  • E001 – Overheating detected.
  • E003 – Ignition failure.
  • E010 – Blocked exhaust or ventilation issue.
  • E012 – Flame loss due to gas supply issues.
If an error code appears, turn off the unit and call 717 Mechanical LLC for expert service.

Unusual noises often signal a problem:
  • Popping or rumbling sounds – Mineral buildup in the heat exchanger.
  • Clicking noises – Failing ignition system.
  • Hissing sounds – Possible gas or air vent issue.
Ignoring these signs may lead to more severe damage over time.

For optimal performance and efficiency, we recommend:
  • Annual descaling and flushing to remove mineral buildup.
  • Filter cleaning or replacement every 6–12 months.
  • Gas burner and ignition system checks once per year.
  • Venting system inspections for blockages and airflow.

While flushing is important, DIY descaling can be risky. A professional ensures:
  • Proper scale removal without damaging internal components.
  • Safe handling of cleaning solutions.
  • Thorough inspection of filters, sensors, and venting.
Professional maintenance protects your system and helps avoid bigger problems.

If your tankless unit turns off unexpectedly, it could be due to:
  • Clogged air intake or vent.
  • Low water pressure, triggering safety shutoff.
  • Overheating from scale buildup.
  • Faulty thermostat or sensor malfunctions.
Our technicians can identify the root cause and restore proper function.

With routine maintenance:
  • Navien units typically last 15–20 years.
  • NTI models can last up to 20 years or more.
Descaling and inspections are key to maximizing system lifespan.

  • Prevents breakdowns and emergency repairs.
  • Maintains water temperature and pressure consistency.
  • Reduces energy use and monthly utility costs.
  • Extends unit lifespan.
  • Ensures safe and efficient operation year-round.

Yes! We service:
  • Gas models, including burner and gas line inspection.
  • Electric units, including element and sensor diagnostics.
  • Complete system testing for both types.
We’re fully equipped for fast, expert repairs and tune-ups.

COMMITTED TO EXCELLENCE IN HOME COMFORT

As a family-focused HVAC company, our mission is to provide honest service with a personal touch. We treat every home as if it were our own, ensuring high-quality workmanship and lasting results.

SPECIALS AND OFFERS

As a family-focused HVAC company, our mission is to provide honest service with a personal touch. We treat every home as if it were our own, ensuring high-quality workmanship and lasting results.

10% off your next repair

10% Off Your Next Repair

Enjoy 10% off your next repair call with us.

10% off your next repair

$89 HEATING TUNE-UP

Enjoy efficient heating with an $89 heating tune-up.

10% off your next repair

$500 OFF ONE INSTALL

Take $500 off the installation of a new unit.

Keep Your Tankless Water Heater Running at Peak Efficiency

A well-maintained tankless water heater ensures consistent hot water, lower energy bills, and a longer system lifespan. Whether your unit needs repairs, flushing, or routine servicing, trust 717 Mechanical LLC for expert Navien and NTI tankless water heater repair and maintenance in Marietta, PA.

With 12 years of experience, our team provides fast troubleshooting, preventative maintenance, and reliable repairs to keep your tankless water heater operating at peak efficiency. If you’re experiencing temperature fluctuations, water pressure issues, or system error codes, we have the expertise to restore performance quickly.

Service Areas for Tankless Repair & Maintenance

We proudly serve homeowners in:

Marietta, PA

Elizabethtown

Mount Joy

Columbia

Wrightsville

Hershey

If you need boiler repair near me, heating tune-ups in Marietta, or an emergency heating repair, we’re here to help.

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Why Choose 717 Mechanical LLC?

Specialized repair & maintenance for Navien & NTI tankless water heaters.

Fast, professional service from experienced technicians.

Upfront pricing with no hidden fees.

Preventative maintenance plans to extend system lifespan.

Customer-focused service and expert recommendations.

Schedule Your Tankless Water Heater Repair or Maintenance Today

Call us now to schedule a Navien or NTI tankless water heater repair, inspection, or maintenance service.

Contact us online for a free estimate and expert recommendations.

Ensure long-term performance and efficiency with professional tankless water heater service from 717 Mechanical LLC.

Let’s Get Started.

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Serving Marietta, PA & Beyond

Looking for reliable HVAC services near Marietta, PA? We proudly serve Marietta and nearby communities, delivering expert heating, cooling, and indoor air quality services. Whether you’re in Columbia, Mount Joy, or Elizabethtown, our team ensures top-quality workmanship and fast, dependable service. Contact us today for all your home comfort needs!

AREAS WE PROUDLY SERVE

In addition to serving Marietta, PA, we provide HVAC services to the surrounding communities, including:

No matter where you’re located in these areas, you can count on us for prompt, reliable service.

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Contact 717 Mechanical LLC Today

Don’t wait to improve your home’s comfort and energy efficiency. Contact us today to schedule your HVAC service in Marietta, PA or one of the surrounding areas. Let us show you the difference of working with a team that puts your needs first!

Book Service (717) 575-8554