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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“Personally, I know he does a good job. Our neighbor is VERY satisfied with him! We even had your sign in our yard.”- Virginia S.
We even had your sign in our yard
"Personally, I know he does a good job. Our neighbor is VERY satisfied with him! We even had your sign in our yard."- Virginia S. -
“Our service tech person Dion Winter always takes great care of us.”- Grover M.
We have always been happy with Great Lakes
"We have always been happy with Great Lakes Heating and Air Conditioning services. Our service tech person Dion Winter always takes great care of us. He arrived with a face mask on and kept a safe distance while getting us ready for the summer months of cooling. If we ever have any problem this company has always responded to our needs."- Grover M. -
“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. -
“Jeff, our Installation Technician did a fantastic job. He was considerate of our home and there was no clean up needed when the job was complete.”- Pat
Our Comfort Advisor was absolutely excellent
"Have used Great Lakes Heating and Air Conditioning for several years. Just had a Furnace and Air Conditioning installed. Amy, our Comfort Advisor was absolutely excellent. She was very detail-oriented, explained all clearly, and answered all our questions. We couldn't have asked for a better person to work with. Jeff, our Installation Technician did a fantastic job. He was considerate of our home and there was no clean up needed when the job was complete. Another important area to us is when you call in for service. We have always had the phone answered in a professional manner. Thanks so much, Great Lakes!"- Pat -
“He was VERY thorough and did an excellent job completely checking out the whole system.”- Bob S.
Great Job!
"Shawn Conery was the Service Technician this time, his first visit to my home. He was VERY thorough and did an excellent job completely checking out the whole system. He did find a bad part, replaced it , put everything back together and fired up the furnace. It worked perfectly. GREAT JOB!!!"- Bob S.
