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.
Technician working on tankless water heater
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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
"Our Rinnai was flashing error code 11 — no ignition. Called H&C at 8 AM and they had a tech at my door by 10. Turned out the flame rod was corroded. He had the part on his truck and had it replaced within an hour. Hot water was back by lunchtime."
"Our Navien was giving us hot-cold-hot water in the shower. H&C diagnosed scale buildup in the heat exchanger. They descaled the unit and cleaned the inlet filter — temperature has been rock steady ever since. They also set us up on an annual descaling schedule."
"Our Noritz tankless wouldn't fire up at all. Turned out the exhaust vent was partially blocked by ice — plus the flow sensor needed replacing. H&C fixed both issues in one visit. Honest, knowledgeable technician who explained everything clearly."
"Water temperature kept dropping mid-shower. Another company wanted to replace the whole unit for $5,000. H&C came out, diagnosed a failing gas valve on our Takagi, and replaced it for a fraction of the cost. Saved us thousands. Highly recommend."
"Annual descaling service on our Rinnai. The tech was thorough — flushed the heat exchanger, cleaned the inlet filter, checked all connections, and tested the gas pressure. Unit is running like new. Great preventative maintenance. Will book again next year."
One-time tankless repair
Tankless Water Heater Repair Questions
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** 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.