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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“I recently had my summer checkup of my furnace and air conditioning on September 5th. Clark, the service attendant who arrived at my house, was polite, friendly, and completely explained everything that he was doing. When Clark went outside to check things, he even folded up my gardening hose that I had left on my yard and placed it close to the house. Talk about great service! These service technicians always represent your company in good and unexpected ways. The other thing I want to mention is that back on January 6th, 2006 my original furnace, which was not from Great Lakes, broke down and it was about 8 degrees outside. I called a variety of furnace companies, but the only company that responded and came out to help me almost immediately was Great Lakes Heating and Air Conditioning. They got my furnace working again on one of the coldest days of the year and I have been with them ever since.”- James L.
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“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 -
“Trustworthy and friendly people. They have a good deal going with the Discount Club”- Liz M
Trustworthy & friendly people
"Trustworthy and friendly people. They have a good deal going with the Discount Club"- Liz M -
“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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“Tracked down and explained the problem and came up with a cost effective fix for now. Couldn't be happier.”- William S.
Great Lakes was very responsive
"Furnace was out on a Sunday morning. Great Lakes was very responsive and the technician really, really excellent. Tracked down and explained the problem and came up with a cost effective fix for now. Couldn't be happier."- William S.
