A straight answer on what usually goes wrong with a Rinnai RE series tankless water heater in North Vancouver and what a repair visit actually involves.
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Quick answer
Most Rinnai RE series repair calls in North Vancouver come down to ignition or flame-sensing faults, a clogged inlet water filter, or a flow sensor that's stopped reading correctly -- all of which a licensed gas fitter can usually diagnose in one visit. The RE series is Rinnai's non-condensing tankless line, so it doesn't have the condensate-drain issues a condensing model can get, but it still needs a proper combustion, venting, and gas-pressure check before anyone touches the electronics.
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As a non-condensing tankless model, the RE series skips the storage tank entirely, heating water the moment a fixture calls for it and venting through its own dedicated flue. In North Vancouver, we run into these units in both older homes that switched over from a tank at some point and newer builds where a tankless unit was part of the original design.
Because the exhaust isn't cooled the way a condensing unit's is, the RE series needs venting rated for that higher temperature, with clearances taken seriously. Both the City and District of North Vancouver draw from the Capilano and Seymour reservoirs, which is about as soft as water gets in this region, so scale is rarely the reason an RE series unit is struggling here.
The complaints we hear most from North Vancouver homeowners are inconsistent hot water temperature, the unit shutting off mid-shower, a delay before hot water arrives that's gotten noticeably longer, or an error light the homeowner can't decode. Trace those symptoms back far enough and it's usually one of: restricted flow from a dirty inlet filter, a flame or ignition sensor misreading, vent blockage, or off-spec gas pressure.
Houses climb the North Shore mountainside in tiers, and it's common to find the gas-fired water heater mounted on an exterior wall of a lower level that's essentially built into the hillside, fully exposed to whatever the mountain is doing weather-wise that week.
The starting point for any repair visit doesn't change from house to house: gas supply pressure, venting condition and clearance, the inlet filter screen, and the flame/ignition sensors. The path after that opening check splits based on whatever fault the unit is actually displaying.
Permits come from whichever of the City or District of North Vancouver the address falls under -- they are two separate authorities even though most people just say 'North Van' -- and that's worth sorting out before a permit application goes in.
If the fix turns out to be a part -- igniter, flow sensor, gas valve, control board -- the explanation of what failed comes before the order, not after. Once the heat exchanger itself is the problem, repair pricing tends to meet replacement pricing, which is exactly when an honest comparison matters most.
A 2026 ballpark for the repair itself -- not a quote, that comes after CANRO's certified technicians do a short assessment -- sits at $250 to $900, on top of the standard $90 to $150 diagnostic/service call, credited toward the repair. What decides where a job falls in that range: the part that failed, how hard the unit is to get at, and whether venting also needs work.
Elevation matters up here: a unit at 400 metres up Mosquito Creek or Lynn Valley sees colder overnight lows and heavier snow loading on the vent terminal than the same model would at sea level, and exterior-wall installs are the ones that show up on our winter freeze-up calls.
Touching the gas line, burner, or venting on an RE series unit calls for a Technical Safety BC licensed gas fitter -- this isn't DIY-friendly work, and mistakes here aren't just cosmetic.
What a homeowner in North Vancouver can safely do before calling: note exactly what the unit is doing (error light pattern, when it fails, whether it's every use or intermittent), check that the gas isn't shut off at a valve somewhere, and make sure nothing is blocking the exterior vent terminal -- snow, leaves, a bird's nest, or storage boxes pushed too close. Everything else is a licensed technician's call, not a homeowner's.
Safety note
If you ever smell gas, hear a strong hiss at the unit, or see scorching or soot around the vent terminal, leave the home first and call FortisBC's emergency line at 1-800-663-9911 from outside. Don't try to relight a gas appliance yourself once it has shut itself down on a safety lockout -- that's the unit doing its job, and a licensed gas fitter needs to find out why before it runs again.
The RE series is Rinnai's current non-condensing tankless line, so parts and service support are both actively available -- this isn't a discontinued model situation.
Most straightforward repairs -- a sensor, an igniter, a filter clean -- are done in one visit once the part is on the truck or sourced locally. If the venting needs work too, budget more time for that portion specifically.
You can power-cycle it once to see if the fault clears, but if the same error comes back the unit is telling you something real failed, and repeatedly resetting a gas appliance without diagnosing the cause isn't a safe habit.
Yes, mineral scale is one of the bigger long-term threats to any tankless heat exchanger. North Vancouver is mostly on soft treated water, so this matters less here than in a well-water area, but periodic descaling still extends the unit's working life.
If the heat exchanger itself has failed, if the unit is old enough that parts availability is getting difficult, or if you're facing a second major repair within a couple of years, replacement usually works out better than chasing repairs on an aging unit.
For most repairs that don't involve re-piping gas or re-routing venting, a permit isn't triggered, but any work that does change the gas line or vent path needs to go through the local permitting authority before it's signed off.
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