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Fast, Expert Tankless Water Heater Repair
Tankless units are efficient but technical, and repairs need real expertise. Excel’s licensed technicians diagnose error codes, restore hot water, and descale every major tankless brand, quickly and correctly.
Error Codes, No Hot Water & Descaling
Tankless water heaters bring their own set of issues, from cryptic error codes to scale buildup that chokes performance. Our technicians know these systems inside out, so we can pinpoint the problem and get your endless hot water flowing again.
- Error codes read and diagnosed correctly
- Descaling to clear performance-robbing buildup
- No-hot-water and flow issues resolved fast
WHY CHOOSE EXCEL
Certified Technicians, Fast and Honest Service
Tankless repair isn’t a job for generalists. Here’s why homeowners trust us with their systems.
Certified Technicians
Your unit is handled by trained, licensed technicians who understand the technical demands of tankless systems and repair them safely and correctly.
Fast Response
We know no hot water can't wait, so we prioritize getting to you quickly to diagnose and fix the problem.
Tankless Specialists
These systems work very differently from tank units. Our experience with tankless technology means accurate diagnosis and fewer repeat visits.
Upfront Pricing
You'll know the cost before we start, explained clearly, with no surprises and no pressure.
ALL MAJOR BRANDS
We Repair
Every Tankless Brand
Whoever made your tankless unit and wherever you bought it, our technicians are trained and equipped to repair it, so you only ever need to make one call.
WHY IT’S WORTH IT
Maximize Efficiency, Extend Unit Life
A properly repaired and maintained tankless unit rewards you with efficiency and longevity, two of the main reasons to go tankless in the first place.
Maximize Efficiency
Clearing scale and restoring proper operation lets your tankless unit run at the high efficiency it was designed for, rather than struggling and wasting energy.
Extend Unit Life
Tankless systems can last longer than tank units when cared for. Timely repairs and descaling protect that investment and add years of service.
Endless Hot Water Restored
A working tankless unit delivers continuous hot water on demand. A proper repair brings back the endless supply you chose tankless for.
Lower Energy Bills
Because they heat water only when you need it, a well-maintained tankless unit keeps energy use, and your bills, down over time.
TRANSPARENT PRICING
What Tankless Water Heater Repair Typically Costs
Water Heater Repairs can vary by the issue, system type, and parts required, with many common repairs in Ontario falling in the $200–1,000+ range. Our labour rates below are clear and upfront, and we always explain the full repair cost before any work begins.
Diagnostic Visit
A technician inspects your tankless water heater, identifies the fault, and explains your repair options.
Flat Rate
$149
Additional Hourly Rate
Parts and HST pricing not included.
Call-out fee
$149
First hour labour
$149
Subsequent hours
$119/hr
After-Hours Emergency Diagnostic
Priority response outside regular hours.
Flat rate
$149
First hour labour
$149
After-Hours Emergency Rate
Incremental hourly rate after the initial diagnostics.
After first hour
$189/hr
When Should I Replace My Tankless Water Heater?
Tankless units tend to last longer than tank models, so repair is often worthwhile. But there’s a point where replacement makes more sense, and it comes down to the unit’s age, the cost of the repair against a new system, and whether faults are becoming frequent. Here are the signs to watch for.
- The unit is more than about 15 to 20 years old
- The repair cost approaches half the price of a new unit
- The heat exchanger has failed or is leaking
- You're seeing repeated error codes or breakdowns
- Descaling no longer restores proper performance
CLIENT STORIES
Real Comfort, Real Stories.
Cooling That Works
“The air conditioning is working perfectly, and we’re very happy with it. We also really like the Wi-Fi thermostat.”
Professional AC Install
“Timely and professional installation of my A/C. Team was courteous and professional.”
A Quick, Clean Fix
“We were very impressed with our experience with Excel Climate Solutions. Our son’s bedroom has always run hot. Justin cut a hole in the drywall and placed a cold air return. The job was quick and he did a great job cleaning up after.”
Midnight Furnace Call
“Excellent experience with Excel! Called in the middle of the night upon realizing the furnace went for a shit. Excel were quick to get Service tech. Paul at the house who resolved the issue quickly and at a fair price.”
Ductless Split Repair
“Had my ductless split serviced by Justin after it stopped working. He fixed it, explained what was wrong and showed me how to properly maintain it and did so in a very friendly manner. I’ll definitely use them again!”
New System, Spotless Install
“Excel Heating and Air Conditioning did an amazing job installing my new furnace and air conditioner! The team was professional, efficient, and left everything spotless. My home is more comfortable than ever, and the system runs perfectly. Highly recommend!”
FAQ
Frequently Asked Questions
Answers to the questions homeowners ask most about tankless repair – error codes, descaling, and when a repair is worth it.
Fluctuating temperatures, sometimes called the ‘cold water sandwich’, can result from scale buildup, a flow or sensor issue, or an undersized unit for your demand. We’ll diagnose why it’s happening and recommend the right fix.
Yes. Our technicians are trained and equipped to repair every major tankless brand, so you only need one call no matter who made your system or where it was installed.
Usually, yes. Tankless units are a significant investment and can last well over 15 years, so repairs are often worthwhile, especially for a newer unit. For an older unit with a failed heat exchanger, replacement may make more sense. We’ll advise honestly.
In areas with harder water, most tankless units benefit from descaling roughly once a year to clear mineral buildup that hurts efficiency and performance. Regular descaling is one of the best ways to keep your unit running well and lasting longer.
A tankless unit can stop heating due to scale buildup, a flow sensor problem, an ignition fault, or a gas or venting issue. Because these systems are technical, it’s best to have a specialist diagnose it properly rather than guess. We’ll find the cause.
Error codes point to a specific fault, from ignition or flow issues to scale buildup or venting problems. The meaning varies by brand and code. Our technicians can read the code, diagnose the underlying issue, and explain exactly what’s needed.
Request Your Free Quote Today
Tell us what’s happening with your tankless unit and we’ll be in touch shortly to help get your hot water back.