Fast, Reliable Tankless Water Heater Repair
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Follow UsIf your tankless water heater is underperforming, producing lukewarm water, or showing error codes on the controller, you don't have to guess what's wrong. The experts at Thompson Heating & Cooling provide trusted tankless water heater repair and maintenance in La Grange, KY, with over 30 years of hands-on experience servicing top systems like Navien and Stiebel Eltron.
We understand how frustrating it is to run out of hot water—especially when your tankless system is supposed to prevent that. Whether your unit needs routine care, diagnostics, or emergency repairs, our certified technicians respond quickly with the tools, training, and professionalism to get it running again—fast.
Contact UsWhen it comes to service, experience matters. We've been repairing and maintaining advanced hot water systems across La Grange and the Greater Louisville area for decades. Here's what sets us apart:
From error codes to flow sensor issues, we've seen it all—and fixed it.
We prioritize customer comfort, ensuring top-rated service with every job.
We handle 90% of repair calls the same day, ensuring your HVAC system stays operational.
With over 30 years of industry experience, our team delivers high-quality heating and cooling solutions.
Tankless units are efficient, but they're also sensitive to factors like water quality, gas pressure, and installation conditions. Some of the most common issues we see include:
If your tankless system is acting up or not producing consistent hot water, don't wait—we'll fix it before it fails completely.
We specialize in the repair and maintenance of the industry's top brands:
Navien systems are high-efficiency condensing units—but they can suffer from scale buildup, flow sensor failure, or venting issues. We have extensive Navien training and access to genuine parts to keep your system working like new.
These electric systems are known for their silent performance and German engineering. If your unit is displaying an error or struggling with heating cycles, we'll run diagnostics, inspect internal components, and repair the issue with precision.
We also service other major brands and can determine compatibility even if we didn't install the system originally.
Some warning signs may seem minor but can signal larger problems developing behind the scenes. Call us if you notice:
Even if your tankless system still "mostly works," these issues can lead to full breakdowns or internal damage if not addressed.
Hard water is common in Kentucky, and scale buildup is one of the top reasons tankless units lose performance. Calcium deposits can clog heat exchangers, reduce efficiency, and cause overheating.
Descaling:
We recommend descaling once a year—or more frequently for homes with high water hardness or heavy usage.
Most tankless water heater warranties require annual maintenance from a licensed professional. Skipping service can void your coverage—leaving you responsible for costly repairs.
Thompson Heating & Cooling provides documented service reports that meet manufacturer guidelines. We'll keep your system in top shape and your warranty intact.
Contact UsNo hot water in the middle of the night or weekend? We offer 24/7 emergency repair services throughout La Grange and nearby areas. If your tankless system fails when you need it most, our technicians will respond quickly with parts, tools, and know-how to restore hot water—fast.
We prioritize:
Preventive maintenance is the best way to avoid costly repairs. Annual service keeps your unit efficient, extends its lifespan, and protects your manufacturer warranty.
This thorough process removes mineral deposits and debris, improves flow rates, and ensures your system operates like new.
Our Comfort Club gives you full coverage for your tankless water heater and HVAC system. This includes:
It's the easiest way to protect your system, save money, and enjoy peace of mind all year long.
Your tankless water heater is designed to last—but it can only deliver reliable performance with the right care. Whether you need emergency repairs, annual maintenance, or help diagnosing a persistent issue, count on Thompson Heating & Cooling for expert tankless water heater repair in La Grange, KY.
We'll restore your hot water, protect your investment, and keep your system working like it should.
Let's get started.
Contact Us 502-817-3105Comfort Club Membership |
Non-Members |
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| Mechanical system inspections | ||
| Performance system inspections | ||
| Safety systems inspections | ||
| Priority scheduling on all service | ||
| $250 off new system installation | ||
| 20% discount on repairs | ||
| No after hours service charges | ||
| Learn More | Join Our Comfort Club Today | |
Investing in your comfort has never been easier. Our affordable HVAC financing options are designed to fit your budget, enabling you to upgrade your heating and cooling systems without the stress of upfront costs. With flexible payment plans and competitive terms, you can immediately enjoy the benefits of modern, energy-efficient systems. Plus, take advantage of available rebates on high-efficiency HVAC systems to further reduce your investment. Contact our team today to learn more about our financing solutions and start enjoying year-round comfort.
Optimus offers smart, hassle-free HVAC financing with quick approvals and flexible payment options.
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When it comes to heating, cooling, and indoor air quality, you need a team that prioritizes expertise, reliability, and customer satisfaction. Here’s why homeowners and businesses across La Grange, Louisville, and surrounding areas trust us:
As a locally owned and family-operated business, we're committed to serving La Grange and surrounding areas with personal, dependable service. We're proud members of the Oldham County Chamber of Commerce, reinforcing our local roots, and as an EGIA member, we offer access to HVAC financing and rebate programs that make comfort more affordable.
We offer affordable HVAC financing options to help you stay comfortable without stretching your budget. Plus, you can take advantage of valuable rebates on high-efficiency HVAC systems, making energy-saving upgrades easier and more cost-effective.
We complete 90% of repairs the same day, delivering fast, efficient HVAC service when it matters most. Our residential and commercial maintenance plans are designed to keep your heating and cooling system running smoothly all year long. With our Comfort Club Membership, homeowners enjoy exclusive perks like priority scheduling and ongoing support.
With over 22 years in business and 30 years of experience, we bring deep industry knowledge to every job. As a Ruud Pro Partner and Mitsubishi Diamond Dealer, we proudly offer industry-leading HVAC brands known for quality and efficiency. We're also certified Climate Master geothermal specialists, delivering energy-efficient heating and cooling solutions.
We proudly serve:
If you're in the Greater Louisville area, call Thompson Heating & Cooling for trusted, responsive tankless repair and maintenance service.
Contact Us 502-817-3105
We prioritize customer comfort, ensuring top-rated service with every job.
We handle 90% of repair calls the same day, ensuring your HVAC system stays operational.
With over 30 years of industry experience, our team delivers high-quality heating and cooling solutions.
Common signs include:
If you're noticing any of these, call for professional service before the issue worsens.
Error codes indicate a specific issue, such as:
We'll diagnose the code, explain what it means, and get your system running again fast.
Inconsistent temps often come from:
We'll inspect the system, clean or replace faulty parts, and recalibrate as needed.
Yes. Hard water leads to scale buildup, which reduces efficiency and shortens the lifespan of your heat exchanger. We recommend annual descaling in La Grange and nearby areas where hard water is common.
Most homes benefit from once-a-year descaling, especially if you have high water usage or live in a hard water area. Regular flushing prevents mineral buildup and maintains performance.
Yes. Even if your tankless water heater seems fine, hidden buildup or sensor issues can reduce efficiency and lead to sudden failure. Preventive service helps avoid expensive repairs down the road.
Our annual maintenance includes:
Yes! We specialize in Navien gas tankless and Stiebel Eltron electric tankless systems. Our technicians are trained to handle diagnostics, part replacement, and system optimization for both brands.
Absolutely. Whether we installed it or not, we'll inspect, diagnose, and repair your system with the same attention to detail and care.
Most repairs can be completed in 1–2 hours, depending on the issue. We arrive with fully stocked trucks so we can often resolve problems in a single visit.
We'll give you honest advice. If your system is under 15 years old and hasn't had major issues, repair is usually the best route. If it's nearing the end of its lifespan or has recurring problems, we may recommend replacement.
With annual maintenance, most systems last 20+ years. Regular flushing, filter cleaning, and part inspections extend life and maintain high performance.
Yes. We offer 24/7 emergency repair services in La Grange and surrounding areas. If your system fails unexpectedly, we'll be there to restore your hot water fast.
Routine maintenance is affordable, especially compared to the cost of major repairs or premature replacement. We also offer discounted service through our Comfort Club Plan.
We provide tankless water heater service throughout:
If you're in the Greater Louisville area, Thompson Heating & Cooling is your trusted tankless repair and maintenance expert.
Tankless water heaters are efficient, reliable, and built to last—but even the best systems need occasional service and attention to perform at their peak. Whether your unit is producing lukewarm water, displaying an error code, or simply due for its annual flush, the team at Thompson Heating & Cooling is here to help.
We bring over 30 years of experience to every job, delivering expert tankless water heater repair and maintenance services throughout La Grange and the Greater Louisville area. We work with top-tier systems like Navien and Stiebel Eltron, and we're fully equipped to handle everything from descaling and sensor replacement to full diagnostics and emergency repairs.
We proudly serve customers in:
When your tankless system falters, we're ready to respond with:
Don't wait for a total breakdown. Our team can catch small issues before they become costly problems—and keep your system running efficiently for years to come.
Want to simplify your maintenance and protect your investment long-term? Ask about our Comfort Club Maintenance Plan, which includes:
Whether your tankless water heater is acting up or simply overdue for routine care, Thompson Heating & Cooling is your local expert for reliable service done right. We've built our reputation on transparency, craftsmanship, and long-term customer relationships—and we'd love to show you why homeowners all across La Grange trust us to keep their homes comfortable.
Don't let a minor issue turn into a major disruption. Restore your hot water—and your peace of mind—with professional tankless service from a team that truly cares.
Let's get started.
Contact Us 502-817-3105
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