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Need a Plumber in Knoxville? We’re Ready to Help!

When your tankless water heater stops working, Tennessee Standard Plumbing is here to get you back on track quickly. Our Knoxville licensed plumbers use advanced diagnostics, high-quality parts, and years of experience to fix issues with both gas and electric tankless systems. Whether it’s error codes, scale buildup, or performance drops, we handle repairs that restore hot water and improve energy efficiency.

Don’t let water heater issues disrupt your day. Request a quote now and get your hot water back on track.

4 Steps. No Surprises.™
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01

Schedule Your
Appointment

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02

Professional Evaluation

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Custom Pricing Options

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Expert Service Delivery

Why Professional Tankless
Water Heater Repair is Essential

Tankless water heaters are complex systems with modulating gas valves, electronic ignition, sensors, and precision controls. Attempting repairs without the right expertise can lead to temporary fixes or safety risks.

Our team uses the proper tools and procedures to identify and resolve the root cause of your issues, ensuring a durable solution that prevents further breakdowns.

Tankless water heater
Signs Your Knoxville Home Needs Tankless Water Heater Repair

If you’re noticing any of these issues, it’s time to call a professional:

  • red thermometer

    Inconsistent water temperature
    (hot-cold-hot cycle)

  • No hot water icon

    No hot water
    even when the unit is on

  • A hand holding a magnifying glass with a speech bubble showing

    Error codes
    displayed on 
the unit

  • Icon depicting a water droplet with flowing lines, symbolizing movement and water flow.

    Weak water pressure
    or low flow

  • Icon of a smartphone with yellow sound waves emanating from both sides icon

    Rumbling or clicking noises
    during operation

  • Burning smells or gas odors

    Burning smells or gas odors
    near the unit

  • A pink circular power button icon with a white power symbol in the center and a black outline.

    Frequent shutdowns
    under normal use

Addressing these early prevents larger component failures and reduces repair costs down the line.

Bobby and Kelton Balka wearing a light blue shirts stand smiling with arms crossed in front of a van displaying the Tennessee Standard logo and colorful graphics.
What Sets Tennessee Standard Plumbing Apart?
  • Highest rated plumbing company in Knoxville
  • Easy online booking & same-day service
  • 0% financing available
  • The owner is a fifth-generation master plumber
  • Smart, licensed plumbers you can trust
  • Surface protection
  • Quality craftsmanship
  • No surprises, just straight answers
Our Guarantees
  • Icon of a red shield with a circular orange center, featuring a green checkmark. A yellow banner below suggests security and protection.

    We Own It Guarantee

    If something goes wrong with our
workmanship, we make it right—no
excuses, no runaround, even if it means covering the cost ourselves.

  • A gold medal with a dollar sign

    Upfront Pricing Guarantee

    You’ll always receive multiple options and a clear price before any work begins. Once you approve, that price won’t change.

  • Illustration of an open hand holding a gold badge

    On-Time Guarantee

    We respect your schedule. If we miss our arrival window, we waive the service fee.

Benefits of Routine Tankless Water Heater Maintenance

Annual maintenance prevents unexpected breakdowns and ensures efficient operation. Regular maintenance helps:

  • Catch Issues Early: Detecting weak igniters, fouled sensors, or clogged vents before they cause major problems.
  • Ensure Steady Temperature Delivery: Clean water pathways and calibrated controls prevent temperature fluctuations.
  • Reduce Operating Costs: A clean heat exchanger transfers heat more effectively, using less fuel.
  • Minimize Error Codes: Properly functioning flow and combustion systems reduce nuisance shutdowns.
  • Extend Equipment Life: Regular maintenance reduces stress on burners, exchangers, and electronics.
  • Improve Water Quality: Descaling boosts water flow and shower comfort.

If you live in a hard-water area, annual descaling is highly recommended to maintain performance.

Bobby and Kelton Balka in light blue shirts stand smiling with arms crossed in front of a van displaying the Tennessee Standard logo and colorful graphics.
Real Reviews. Real Results. See Why Tennessee Homeowners & Businesses Trust Us
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Why Tennessee Standard Plumbing is the Gold 
Standard for Knoxville Plumbing

“ I feel comfortable calling and sending Tennessee Standard in my house to fix a problem. He respected my home just like I do. To us, Tennessee Standard is the gold standard.

Got Plumbing Problems? - We Diagnose Fast and
Fix it Right the First Time.
Common Questions About Tankless Water Heater Repair in Knoxville TN

With Knoxville’s hard water, descaling is recommended at least once per year.

No, even gas-powered tankless units require electricity for ignition, sensors, and controls. If you experience frequent outages, consider adding a battery backup to keep your hot water available.

Yes, in many cases. Clearing mineral buildup, replacing faulty sensors, and restoring flow can significantly improve water pressure.

Yes, gas-powered units require proper venting to safely exhaust combustion gases. We verify venting safety and code compliance during repairs.

Absolutely! Regular cleaning, descaling, and inspections can extend the lifespan of your unit, potentially lasting 15-20 years with proper care.

We service a wide range of tankless water heater brands for homes and commercial properties. If you’re unsure, contact us, and we’ll confirm whether we can repair your unit.

Yes, we offer payment plans through GoodLeap financing for customers throughout the Greater Knoxville area, including Maryville, Oak Ridge, Farragut, and surrounding communities.

Yes. All of our work comes with a warranty covering both parts and labor, so you can have confidence in the quality and durability of our residential plumbing services.

Yes! We occasionally have specials or discounts for certain services. Check the Specials page on our website for current offers, which may vary based on the service type.

You can contact us by submitting our online form. After we receive your request, a team member will reach out quickly to arrange a convenient time for your service. We handle all types of plumbing jobs efficiently.

A branded van for The Tennessee Standard is parked in a lot, featuring a cartoon character holding a wrench on its side.