Rinnai I-Series Plus Combi Boiler Service in Greater Vancouver

Want a straight answer for your home? Call (604) 359-1081 or request a free written quote.

What the Rinnai I-Series Plus Combi Is

The Rinnai I-Series Plus is a wall-hung, gas-fired condensing combi boiler: one compact unit that supplies both hydronic space heating and on-demand domestic hot water. In Metro Vancouver homes it typically replaces the pairing of an aging floor-standing boiler plus a separate hot water tank, freeing up mechanical-room or closet space in townhouses, laneway homes and older Vancouver Specials where every square foot counts. As a condensing appliance in the mid-90s AFUE class, it extracts extra heat from flue gases that older mid-efficiency boilers simply vent outdoors.

Rinnai's model naming makes the lineup easy to read: in each model number, the first group of digits reflects the space-heating input and the second reflects the domestic hot water input, in thousands of BTU/h. That means there is a genuine range here — from smaller units suited to a compact condo-style radiant zone up to high-output models that can keep a large detached home in hot water and warm floors at the same time. CANRO helps you match the right model to your home's actual heat loss rather than guessing by square footage.

All I-Series Plus combis are sealed-combustion, direct-vent appliances. In BC that matters: they vent in PVC/CPVC or polypropylene through a wall or roof, and as condensing units they produce acidic condensate that must be neutralized and drained correctly. Both details are routine for our gasfitters and both are common failure points when a unit was installed carelessly.

Signs Your I-Series Plus Needs Repair

Combi boilers fail differently than tank systems because one appliance does two jobs. Homeowners across Burnaby, Vancouver, Coquitlam and the North Shore call us about the same handful of symptoms:

• Hot water that runs lukewarm, fluctuates, or cuts out mid-shower while heating still works (or vice versa)
• The boiler locks out with an error code on the controller and needs repeated resets
• Short cycling — the burner fires, runs briefly, and shuts down over and over
• Kettling, gurgling or banging noises from the unit or the piping
• Radiators or in-floor zones that never fully warm up, or take far longer than they used to
• Dropping system pressure on the gauge, or the pressure relief valve dripping
• Condensate leaking around the base of the unit or a blocked condensate drain
• A noticeable jump in your FortisBC gas bill without a change in usage

None of these symptoms mean the boiler is finished. Most are a single failed component or a system-side issue like trapped air, scale or low pressure. But ignoring them through a January cold snap is how a $0 problem becomes a no-heat emergency, so it pays to have it diagnosed early in the season.

Repair and Diagnostics in Greater Vancouver

CANRO's Red Seal certified, Technical Safety BC licensed gasfitters (gas licence LGA0043870, boiler licence LBP0046450) diagnose I-Series Plus combis methodically rather than by parts-swapping. A proper diagnostic starts with the error history on the controller, then verifies the basics that cause most lockouts: gas supply pressure, combustion air and venting, system water pressure, condensate drainage, and flame signal. From there we test the specific component the evidence points to.

Because we're based in Burnaby, we cover the whole region quickly — Vancouver, North and West Vancouver, Richmond, New Westminster, the Tri-Cities, Surrey, Delta and Langley. During cold snaps, when call volume across Metro Vancouver spikes, we prioritize no-heat and no-hot-water calls and offer same-day and after-hours service. Repairs are quoted before work begins: you pay for the diagnostic visit, and every recommended repair comes with a free written quote so you can decide with real numbers in front of you.

Common Fault Behaviour on the I-Series Plus

Like most modern condensing combis, the I-Series Plus protects itself by locking out and displaying a code when something is out of range. Rather than list codes you'd have to trust blindly, here are the fault families we actually see in the field:

• Ignition and flame-detection faults — the burner fails to light or fails to prove flame, usually traced to the ignitor, flame rod, gas valve adjustment or gas supply pressure
• Venting and combustion-air faults — blocked, sagging or improperly sloped vent runs, or fan/pressure-switch issues; common in retrofits where the vent was reused
• Low water pressure faults — the boiler refuses to fire until system pressure is restored, often pointing to a small leak or a waterlogged expansion tank
• Overheat and circulation faults — a failing circulator, closed valve or air-bound zone stops flow through the heat exchanger
• Condensate faults — a plugged trap or frozen exterior condensate line backs acidic condensate into the unit, a genuinely common winter call in Vancouver's freeze-thaw weather
• Sensor and control faults — drifting temperature sensors or control board issues that cause erratic temperatures rather than hard lockouts

If your unit is displaying a specific code, note it before resetting — the stored history shortens the diagnostic and can save you money on the visit.

Installation and Replacement

Installing a combi boiler well is a design job, not just a plumbing job. Before we quote an I-Series Plus installation, CANRO sizes the unit against your home's actual heat loss and your realistic hot water demand — how many bathrooms run at once matters far more than square footage for the domestic hot water side. Oversizing a combi is the most common installer mistake in Metro Vancouver, and it leads to short cycling, wasted gas and premature component wear.

A CANRO installation includes the Technical Safety BC gas permit, correctly sized gas piping (high-input models can require a gas line upgrade from older 1/2-inch runs), code-compliant direct venting, a condensate neutralizer and freeze-protected drain, system flushing, a magnetic filter to protect the new heat exchanger from old-system sludge, and full commissioning with combustion analysis — not just "it fires, we're done." We walk you through the controller settings before we leave.

Typical installed cost for a boiler installation in Greater Vancouver runs $6,500-$14,000+, and a full boiler replacement (removing an old boiler and often a hot water tank, upgrading venting and piping) runs $7,500-$15,000+. Where your project lands depends on model size, venting distance, gas line work and how much of the old hydronic system needs correction. Every quote is written, itemized and free.

Parts Replacement for I-Series Plus Combis

Most I-Series Plus repairs come down to replacing one component correctly. CANRO stocks and sources the common wear parts for Rinnai condensing combis, and because Rinnai has strong distribution in the Lower Mainland, most parts are available same-day or next-day through Metro Vancouver suppliers rather than sitting on a multi-week backorder.

• Gas valves — regulating gas flow to the modulating burner; a drifting valve causes rough ignition and combustion faults
• Ignitors and flame sensors (flame rods) — the most common cause of ignition lockouts; often a maintenance-level fix
• Heat exchangers — both the primary heat exchanger and the plate heat exchanger that makes domestic hot water; plate exchangers scale up in harder-water pockets of the region and can be descaled or replaced
• Circulator pumps — a seized or failing pump stops heat delivery and triggers overheat faults
• Pressure relief valves (PRVs) — a dripping PRV usually signals expansion tank trouble, but a fatigued valve must be replaced, never plugged
• Expansion tanks — waterlogged tanks cause pressure swings and PRV discharge
• Combustion fans — bearing wear causes noise first, then vent-proving faults
• Temperature and pressure sensors — cheap parts that cause expensive-looking symptoms when they drift
• Control boards — replaced when diagnostics genuinely point there, not as a default guess

We don't publish flat prices for parts work because the same component can be a quick swap on one unit and a teardown on another. You pay for the diagnostic visit, then receive a free written quote for the exact part and labour before anything is replaced.

Annual Maintenance and Tune-Ups

Condensing combis are not install-and-forget appliances. Rinnai, like every condensing boiler manufacturer, expects annual servicing — and skipping it is the fastest way to shorten heat exchanger life and complicate warranty conversations. In Vancouver's climate, the smart time to book is late summer or early fall, before the first cold snap fills every contractor's schedule.

A CANRO annual tune-up on an I-Series Plus includes cleaning and inspecting the burner and flame rod, checking and cleaning the condensate trap and neutralizer, verifying gas pressure and combustion with an analyzer, checking system water pressure and topping up correctly, inspecting the venting end-to-end, testing safety controls and the PRV, checking the expansion tank charge, and reviewing the unit's stored error history for early warnings. Fifteen minutes of condensate-trap cleaning in September prevents a remarkable number of January no-heat calls.

Cost Guidance, Rebates and Financing

For repairs and parts on the I-Series Plus, CANRO charges a diagnostic visit and then provides a free written quote for the fix — no surprise line items, no commission-driven upselling to a replacement you don't need. For new equipment, boiler installation in Greater Vancouver runs $6,500-$14,000+ and boiler replacement runs $7,500-$15,000+, depending on model, venting and system corrections.

On rebates: the federal Canada Greener Homes Grant closed to new applicants in 2024, but the Canada Greener Homes Loan (interest-free financing for eligible retrofits), CleanBC programs, and FortisBC rebates for qualifying high-efficiency natural gas equipment remain active. Eligibility rules and amounts change, so we confirm what your specific project qualifies for at quote time rather than promising numbers that may be out of date. We can also discuss financing options so a mid-winter boiler failure doesn't have to be paid in one lump.

Why Greater Vancouver Homeowners Choose CANRO

CANRO Heating & Cooling is an independent licensed contractor — we're not tied to any single brand, which means our advice on whether to repair or replace your Rinnai is driven by the boiler's condition, not a sales quota. We've served Metro Vancouver since 1999 from our shop at 7325 6th Street, Burnaby.

• Technical Safety BC licensed: gas licence LGA0043870 and boiler licence LBP0046450
• Red Seal certified technicians
• WorkSafeBC coverage and liability insurance
• 4.9-star rating from 85+ Google reviews
• Same-day and after-hours availability for no-heat and no-hot-water calls
• Diagnostic visit plus free written quotes — you approve every repair before it happens
• Permits pulled on every gas installation, every time

Whether your I-Series Plus is locking out mid-shower or you're weighing a combi conversion for an older Vancouver home, call (604) 359-1081 or email info@canroheat.ca and talk to a gasfitter, not a call centre.

Frequently asked questions

Part of the CANRO Rinnai boiler services hub — see every related service there.

Reviewed by the CANRO Heating & Cooling service team — July 06, 2026. Technical Safety BC gas licence LGA0043870 · boiler licence LBP0046450 · Red Seal certified · WorkSafeBC and liability insured · 4.9★ from 85+ Google reviews · serving Metro Vancouver since 1999 · (604) 359-1081.