Reliable Tankless Water Heater Repair Service in GTA
At HVAC Group, we provide fast, reliable tankless water heater repair across the GTA. Whether you have no hot water, low pressure, or error codes, our certified technicians quickly diagnose and fix the issue. We service all major brands with same-day emergency repairs whenever you need.
Hot Water Anytime
Same-Day Tankless Water Heater Repair – Serving the Entire GTA!
A failing tankless water heater can disrupt your daily routine. That’s why we offer 24/7 emergency water heater repair services across the GTA. Whether it’s low water pressure, ignition failure, or mineral buildup, our expert technicians provide quick diagnostics and lasting repairs. We restore hot water fast, ensuring your system runs efficiently and reliably.
Water Heater Experts
Comprehensive Tankless Water Heater Repair Services We Provide
Tankless Water Heater Diagnostics
Our technicians inspect heating elements, flow sensors, and gas valves to pinpoint issues. We check for ignition failures, clogged filters, and temperature inconsistencies to restore efficiency.
Error Code Troubleshooting
If your heater displays an error code, we identify and fix the issue. From E1 ignition failures to E5 overheating warnings, we reset sensors, clear blockages, and adjust system settings.
Burner & Ignition System Repair
A faulty burner, flame sensor, or thermocouple can prevent your system from heating water. We repair or replace components to ensure safe ignition and consistent heating.
Heat Exchanger Flushing & Descaling
Mineral buildup can reduce efficiency and cause overheating. We perform professional descaling to remove lime and calcium deposits to restore proper heat transfer and system performance.
Flow Sensor & Water Pressure Adjustment
Low water pressure or temperature fluctuations? We clean or replace clogged flow sensors and adjust pressure regulators to ensure consistent hot water flow.
Gas Line & Exhaust Venting Inspection
We check for gas leaks, carbon monoxide buildup, and venting obstructions to ensure safe operation and proper airflow. All repairs follow HVAC safety codes.
Electrical System & Circuit Board Repair
If your unit won’t power on or cycles erratically, we inspect and repair damaged wiring, fuses, and circuit boards to restore functionality and prevent system failures.
Having a HVAC problem? We’ll FIX it today!
We’re available 24/7 to restore your comfort. Call now for same-day service!
Hot Water Anytime
Signs Your Tankless Water Heater Needs Repair – Don’t Ignore These Red Flags!
Sudden Loss of Hot Water
If your water heater stops producing hot water, it could be due to ignition failure, a faulty heating element, or gas valve issues. We diagnose and restore heating efficiency quickly.
Inconsistent Heating
Fluctuating temperatures may result from a clogged flow sensor, malfunctioning thermostat, or mineral buildup in the heat exchanger. Proper calibration ensures consistent hot water.
Rattling, Hissing, or Popping Noises
Unusual noises often indicate sediment buildup, air blockages, or burner malfunctions. A professional flush and burner inspection can resolve these issues and prevent long-term damage.
Fluctuating Water Pressure
Low or inconsistent water pressure can be caused by a clogged inlet filter, failing flow sensor, or plumbing obstructions. Adjustments and sensor repairs restore proper water flow.
Visible Leaks or Rust Buildup
Leaks around the unit or rust on pipes, fittings, or the heat exchanger may indicate corrosion, loose connections, or a failing pressure relief valve. Prompt repairs prevent major damage.
Strange Odours
A burning smell could signal electrical issues, while a sulphur-like odour may indicate gas leaks or bacteria in the water lines. Proper ventilation and system checks ensure safe operation.
Expert Maintenance for Every Water Heater Type
From Tankless to Traditional – Water Heater Types We Fix
Gas Tankless Water Heaters
We fix ignition failures, gas valve malfunctions, burner issues, and venting problems. Our technicians ensure safe gas pressure regulation and proper combustion for peak efficiency.
Electric Tankless Water Heaters
If your heating elements fail, circuit board malfunctions, or sensors misread temperature, we diagnose and repair electrical faults, thermostat failures, and wiring issues for consistent heating.
Condensing Tankless Water Heaters
Condensing models require proper exhaust venting, condensate drain maintenance, and high-efficiency burner calibration. We fix corrosion issues, sensor errors, and heat exchanger buildup.
Qulaity Brands We Work With
From Carrier to Trane – The Best AC Brands We Work With
Heat Water Right
Who We Serve – Reliable Water Heater Repairs for Every Property Need
Residential
We repair tankless water heaters in homes, condos, and apartments, ensuring consistent hot water flow, efficient heating, and optimal water pressure. Our services include ignition system repairs, descaling, thermostat calibration, and leak detection to keep your home’s system running efficiently.
Commercial
Businesses require high-performance water heating for daily operations. We service restaurants, hotels, office buildings, and multi-unit properties, handling high-capacity flow rate adjustments, burner and gas valve repairs, exhaust venting issues, and emergency troubleshooting to minimize downtime.
Stay Warm, Always
No Hot Water? Our Emergency Repair Service Is Just a Call Away!
A failing tankless water heater can disrupt your home or business. Our emergency repair service quickly resolves ignition failures, gas valve malfunctions, flow sensor issues, and error codes. We diagnose and fix low water pressure, overheating, and burner failures to restore hot water fast. Available 24/7 across the GTA for urgent repairs.
Emergency Water Heater Services
Get fast, same-day service with 24/7 availability for all your water heater emergencies. Whether it’s a sudden breakdown or no hot water, our expert technicians are ready to restore your comfort. Call now, and we’ll send help right to your door
Your Heating Experts
Save Energy & Money with Our Water Heater Services
A well-maintained water heater runs more efficiently, lowering energy bills and reducing wear on components. Our services include flushing, thermostat calibration, anode rod replacement, and burner optimization to prevent heat loss, improve recovery rates, and extend system lifespan.
Why to Work with Us
What Makes Us Stand Out? Here’s Why You Should Choose Us
Years of Experience
We have years of expertise in diagnosing and repairing tankless water heaters. Our team handles ignition issues, heat exchanger maintenance, and sensor calibration with precision.
Tailored Solutions
We customize flow rate settings, thermostat calibration, and burner adjustments to match your home’s hot water needs and energy efficiency goals.
Licensed & Experienced Technicians
Our certified technicians specialize in gas line repairs, circuit board troubleshooting, and burner adjustments. We ensure safe, code-compliant service for every repair.
Fast & Reliable Repairs
We offer same-day service for ignition failures, venting blockages, and pressure issues. Our team ensures minimal downtime and maximum system performance.
Advanced Tools & Techniques
We use gas leak detectors, thermal imaging, and multimeters to pinpoint error codes, heating failures, and electrical faults. Our methods ensure fast and accurate diagnostics.
Transparent Pricing
We provide upfront pricing with no hidden fees. Our estimates cover error code diagnostics, heat exchanger descaling, and system tune-ups with clear cost breakdowns.
High-Quality Workmanship
We follow manufacturer standards to deliver secure installations and durable repairs. Our work ensures optimal water heating and long-term system reliability.
Work With All Major Brands
We repair Rinnai, Navien, Noritz, Bosch, Rheem, Takagi, AO Smith, and Stiebel Eltron models. Our team uses OEM parts for reliable and lasting repairs.
Comfort Made Easy
Real Results from HVAC-Group Inc
Location We Serve
- Brampton
- Burlington
- Concord
- Etobicoke
- Milton
- Mississauga
- North York
- Oakville
- Thornhill
- Toronto
- Vaughan
- Woodbridge
- Georgetown
Frequently Asked Questions
Can a tankless hot water heater be repaired?
Yes, most tankless water heater issues can be repaired. Common fixes include ignition system repairs, sensor replacements, burner cleaning, and heat exchanger descaling.
What is the life expectancy of a tankless water heater?
A well-maintained tankless water heater lasts 15–20 years. Regular descaling, filter cleaning, and component inspections help extend its lifespan.
How do you fix a tankless water heater problem?
Repairs depend on the issue. We diagnose error codes, flush scale buildup, adjust gas pressure, clean sensors, and repair electrical components to restore proper function.
Are tankless water heaters serviceable?
Yes, they require regular maintenance and occasional repairs. Technicians can replace parts, clean filters, descale the heat exchanger, and troubleshoot system malfunctions
Do tankless water heaters need to be flushed every year?
Yes, especially in areas with hard water. Flushing removes mineral buildup, prevents clogs, and maintains heating efficiency, extending the unit’s lifespan.
Can you install a tankless water heater in my home?
Yes! We provide professional tankless water heater installation for homes across Mississauga. Our technicians ensure proper sizing, setup, and performance so you can enjoy endless hot water with better energy efficiency and more space.
What is the labor cost to repair a tankless water heater?
Labor costs vary based on the issue and brand. Basic repairs start at $150–$300, while complex fixes like heat exchanger replacement can exceed $500.
Why is my tankless water heater not producing hot water?
Common causes include ignition failure, a faulty flow sensor, clogged filters, or a gas supply issue. A professional diagnosis can pinpoint and resolve the problem.
How do I know if my tankless water heater needs repair?
Signs include fluctuating temperatures, error codes, unusual noises, low water pressure, and leaks. If you notice these issues, schedule a repair immediately.
How often should a tankless water heater be serviced?
Annual maintenance is recommended to keep your system running efficiently. This includes flushing the heat exchanger, cleaning filters, checking venting, and testing gas pressure