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Tankless water heaters have more moving parts than tanks but also better diagnostics. Most no-hot-water issues throw an error code on the display. Here is the 7-step diagnostic path before calling CANRO.
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Note the exact code. CANRO can often guide you through a fix over the phone if you have the code ready.
Tankless units need 0.4-0.6 GPM minimum to fire. A trickle from one tap will not activate the unit. Open the tap fully and confirm hot water arrives.
Check that the gas valve at the unit is open and the main FortisBC service is working (check the stove or furnace).
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📞 (604) 359-1081 Request a quoteTankless units need 120V electricity. Confirm the unit’s breaker is on and the power LED is lit.
Remove the small screen at the cold inlet, rinse, reinstall.
Lint and dust block the air intake on the front of the unit. Vacuum or brush clean.
Tankless units without freeze protection can freeze and crack in a cold snap. Check for water under the unit. If there has been a recent power outage during a freeze, call CANRO immediately — heat exchanger may be cracked.
| Navien E003 / E004 | Ignition failure — check gas supply |
| Navien E012 | Flame loss during operation |
| Navien E016 | Heat exchanger overheat — descale |
| Navien E040 | Cold-inlet sensor fault |
| Rinnai 11 | Ignition failure |
| Rinnai 12 | Flame failure |
| Noritz 11 | No ignition |
Free in-home consultation. TSBC-licensed technicians. FortisBC rebate paperwork handled.
📞 (604) 359-1081 Request a quoteCANRO Heating & Cooling — TSBC Class-A gas-fitting licence · Red Seal HVAC certified · WorkSafeBC and liability insured · 4.9★ from 85+ Google reviews · Serving Metro Vancouver since 1999.
CANRO Heating & Cooling — TSBC Class-A gas-fitting licence · Red Seal HVAC certified · WorkSafeBC and liability insured · 4.9★ from 85+ Google reviews · Serving Metro Vancouver since 1999.
What follows is the practical information CANRO shares with Metro Vancouver homeowners about tankless water heaters during in-home consultations. A condensing tankless gas water heater in Metro Vancouver delivers endless hot water at 90%+ efficiency, fits on a wall (reclaiming 25 sq ft of floor space vs a tank), and lasts 18-22 years.
Metro Vancouver's coastal climate brings salt-laden air to coastal neighbourhoods (Steveston, Tsawwassen, White Rock) that accelerates outdoor coil corrosion — an important factor in equipment selection and placement. CANRO has worked with tankless water heater systems across Metro Vancouver since 1999, including installations and service calls in Eagle Ridge, Maple Ridge, Yaletown and Brighouse.
Sizing. Tankless sizing focuses on peak GPM (gallons per minute) at design temperature rise. Vancouver's 7-9°C incoming water needs about 32°C rise for typical use — most family installs need a 199,000 BTU unit.
Lifespan. Annual descaling is essential in Vancouver's moderately hard water — without it, scale build-up on the heat exchanger cuts capacity by 30% and shortens lifespan to under 10 years.
Warning signs. Tankless issues include flow-rate drops (scale), ignition lockouts (gas pressure or flame-rod fouling), condensate-trap clogs, and recirculation pump faults on units with built-in pumps.
A condensing tankless gas water heater installed by a qualified contractor in Metro Vancouver lasts 18-22 years with annual descaling. Without annual descaling, lifespan drops to 10-12 years.
A 199,000 BTU tankless in Metro Vancouver delivers about 5-7 gallons per minute at a 32°C temperature rise (Vancouver incoming water is ~7-9°C). That handles two simultaneous showers comfortably, or a shower plus a dishwasher.
Annually in Metro Vancouver's moderately hard water. Without descaling, scale build-up on the heat exchanger cuts capacity by 30% within 3-4 years and shortens lifespan to under 10 years. CANRO descales tankless units as part of every annual service.
Tankless gas water heaters cut operating cost 25-40% vs a tank because they eliminate standby heat loss. Upfront cost is higher ($3,500-$6,000 installed vs $1,800-$3,200 for a tank), but most homes recover the difference in 6-9 years on gas savings.
Yes, with proper sizing. A 199,000 BTU condensing tankless will run two showers (at typical 1.8 gpm each) simultaneously through a Vancouver winter. For larger demand (3+ showers + dishwasher), consider linked tankless units or a combi boiler with built-in DHW recirculation.
Recirculation pumps return cooled hot water from the far fixture back to the tankless, eliminating the cold-water wait. Many modern tankless units (Navien NPE-A, Noritz EZ) have built-in recirculation. Worth the upgrade for homes where the kitchen or master bath is far from the mechanical room.
To book tankless water heater service or get a free written quote for installation, call CANRO at (604) 359-1081 or email info@canroheat.ca. We service all of Metro Vancouver including Eagle Ridge, Maple Ridge, Yaletown and Brighouse.
This guide was written by the CANRO Heating & Cooling team based on 25+ years of tankless water heater installation, repair and annual service work across Metro Vancouver. Last reviewed May 2026.
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