Tankless Water Heater Repair in South Bend
Fast, Honest Repairs from a Family-Owned Team Serving Michiana Since 1957
When your tankless water heater stops delivering hot water, waiting isn’t an option. Great Lakes Heating & Air Conditioning has served South Bend families since 1957, and our 24-hour availability means a broken on-demand hot water system can get attention day or night, not just during business hours.
Call us at (574) 498-7556 to schedule same-day tankless water heater repair. We can diagnose the problem before we start any work and give you a clear price upfront.
Signs Your Tankless Unit Needs a Professional
Tankless water heaters are reliable, but they do fail. Knowing what to look for helps you act before a minor issue becomes a costly one.
- No hot water or lukewarm output: The unit may be firing but not heating properly or failing to fire at all.
- Error or fault codes on the display: Most units flag problems with a numeric code pointing to the ignition system, flow sensor, or heat exchanger.
- Ignition failure on gas units: Gas-fired tankless heaters can fail to ignite on demand, leaving you with cold water even when gas pressure is normal.
- Flow sensor malfunction: A faulty flow sensor prevents the unit from recognizing that water is moving, so it never activates.
- Reduced output from scale buildup: Mineral deposits on the heat exchanger restrict flow and trigger error codes, a common problem in hard-water areas.
If any of these sound familiar, don’t wait. Error code diagnostics are fastest when the unit is still displaying the fault.
Repair Advice You Can Trust
Our technicians are paid an hourly wage, not a commission on parts sold. That structure removes any financial reason to steer you toward a repair or replacement that doesn’t fit your situation. You get an honest assessment of what your system actually needs.
Every technician carries NATE certification, reflecting demonstrated knowledge of real-world system performance rather than textbook theory alone. Before anyone enters your home, they’ve passed a background check and drug test. We earned first place for HVAC and Electrical services in the 2025 Community’s Choice Awards, voted on by South Bend residents, and we hold an A+ rating with the Better Business Bureau.
What to Expect During a Repair Visit
Before we drive out, we can connect through virtual diagnostic tools. You show us the unit through your phone camera, and we can identify whether the fix is straightforward or requires a specific part ordered in advance. It saves time on both ends.
When the technician heads your way, you’ll receive a text with their photo so you know exactly who to expect. Shoe covers go on at the door. The technician explains the issue and shows you the problem before touching anything, and the final bill matches the price you approved before work began. If you’re uncertain about the diagnosis, free second opinions are available.
A well-maintained tankless unit can last 20 years or more. Repair is often the practical choice, and we’ll tell you honestly when it isn’t.
Great Reviews From People We've Helped Hear From Our Community
Great Lakes has earned over 1,000 5-star reviews because we treat every home like our own.
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“Great Lakes Heating is one of the best Heating and Air Conditioning Companies in the Michiana Area. I have been using them for years now and will continue to do so because they do such a great job.”- John E.
one of the best Heating and Air Conditioning Company
"Great Lakes Heating is one of the best Heating and Air Conditioning Companies in the Michiana Area. I have been using them for years now and will continue to do so because they do such a great job."- John E. -
“Their attention to all details, careful and detailed explanations of the install processes, time of arrival, clean up after the job (daily), represent the excellence of customer services.”- Robert S.
You will not be disappointed!
"I am a customer for "life." My heating and air (18 years old) needed replacement along with a cold air duct installed in the finished basement wall. I am extremely detailed (OCD) about all home improvements. I consulted Great Lakes Heating and AC and received very competitive pricing from (sales representative/Bruce) with excellent communication and follow-up during and after the sale. The two techs (Nathan and Sam) performed all install services in an excellent manner and demonstrated the excellence of the Great Lakes Heating and AC brand. Their attention to all details, careful and detailed explanations of the install processes, time of arrival, clean up after the job (daily), represent the excellence of customer services. I am forever appreciative and grateful for a job well done and will be a dedicated customer for "life." Thank you, thank you, thank you! I urge all, PLEASE use their services for all of your heating and AC needs....you will not be disappointed!"- Robert S. -
“Clark showed up on time and was extremely personable! The two things that stood out the most to me were his professional appearance and in-depth knowledge. This is the exact reason I switched to Great Lakes and I plan to continue using them!”- Zen M.
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“Shawn, the technician was very professional and easy to work with. The whole experience was transparent and low-pressure.”- Jennifer D.
Great Lakes is great
"Great Lakes is great. They were able to come out same-day. Shawn, the technician was very professional and easy to work with. The whole experience was transparent and low-pressure. We would absolutely work with them again."- Jennifer D. -
“Installed New Furnace and Air Conditioner plus had the air ducts cleaned. Bruce, Stan, Josh, and the Twins all were very Professional and Courteous.”- Todd A.
Top-Notch from start to finish
"Top-Notch from start to finish. Installed New Furnace and Air Conditioner plus had the air ducts cleaned. Bruce, Stan, Josh, and the Twins all were very Professional and Courteous. Very smooth process, everything looks amazing. I would recommend them to anyone needing a new system. Thank you."- Todd A.
