Tankless Error Code?
We'll Diagnose It Today.
Licensed technicians trained on Rinnai, Navien, Noritz, and more. Same-day tankless water heater repair across the GTA — we don't leave until the hot water is flowing.
Tankless-Trained Technicians with Parts on the Truck
Tankless water heaters are more complex than tank models — they require technicians who understand computerized controls, error codes, gas valve modulation, and heat exchanger diagnostics. Our techs are factory-trained on Rinnai, Navien, and Noritz systems, and our trucks carry the most common tankless parts: ignition assemblies, flow sensors, flame rods, circuit boards, and descaling kits.
Our technicians bring decades of hands-on tankless and water heater knowledge to every call.
We know every error code on every major brand — and we carry the parts to fix it.
Nights, weekends, holidays. No hot water can't wait — neither do we.
Common Tankless Water Heater Issues We Diagnose
Tankless units are reliable but complex. When something goes wrong, you need a technician who can read error codes and diagnose the root cause — not just reset the unit.
Whatever the error code, we diagnose it quickly and explain it clearly — so you know exactly what's happening and what it'll cost before any work begins.
Quick Tankless Troubleshooting Tips
While it's always best to call a professional for tankless units, these checks can sometimes resolve simple issues:
Tried all of these and still getting error codes? Give us a call — that's what we're here for.
Schedule Your Tankless Repair
Book online through our service request form and we'll get back to you within the hour. For emergencies or persistent error codes, call us directly — we answer 24/7.
We Service All Tankless Brands
Our technicians are factory-trained on the most popular tankless brands sold in Canada. We carry common parts for fast, same-visit repairs.
- › Rinnai
- › Navien
- › Noritz
- › A.O. Smith
- › Takagi
- › Rheem
Don't see your brand listed? We service it. Call us — our technicians have worked on every tankless brand sold in Canada.
GTA Tankless Water Heater Repair Coverage
We dispatch technicians across the Greater Toronto Area, 7 days a week. Same-day service in most areas.
Real Reviews from Real Customers
"H&C Heating and Cooling just finished the installation of my new Lennox high efficiency furnace and Noritz tank less water heater for a fair price with timely and competent installation. I would highly recommend them if you find yourself needing any kind of H vac service."
"Simply the best! My furnace broke down and I called these guys to assess the situation as I have small kids and it was urgent. Cam was at my house within an hour and diagnosed the problem. He was very thorough and showed me the cause of the failure and provided several options which was nice and I didn't feel like anything was forced. I opted to replace the equipment as it was very old and I got a great package deal for a furnace, Air Conditioner and a tankless water heater. All units were installed the same day and I had heat and hot water by evening. Extremely happy with the service! Company even followed up the next day to make sure everything was taken care of!"
"Most helpful, quick, kind and professional. Highly recommended! Many thanks!"
"Good service when you need them they're here fast good prices Pleasant people I would call them anytime"
"Professional, timely and efficient service. I would highly recommend using this company. Exceeds expectation."
One-time tankless repair
Tankless Water Heater Repair Questions
Legal
** Standard diagnostic rate is $150 + HST weekdays and $179 + HST on weekends and statutory holidays. Cost of repairs not included.
*** Parts and labour warranties cover all repair work completed during the service visit, not limited to a single diagnosed issue.
Same-day service is offered on a best-effort basis depending on technician availability. Priority scheduling is available for H&C Maintenance Plan members — launching soon.