Kerrisdale's older, larger character homes near 41st Avenue often run mature gas boilers, and CANRO's licensed technicians diagnose and repair faults across the neighbourhood.
Tell us what you need—we’ll call you back fast.
Quick answer
A gas boiler in a Kerrisdale home that trips on ignition faults, loses pressure gradually, or leaves upstairs radiators cool while the mechanical room runs warm typically needs a technician to check the expansion tank charge, inspect the burner and flame sensor, and pressure-test the distribution piping before any parts are replaced. Because Kerrisdale carries a disproportionate share of Vancouver's older, larger character homes, boiler age and cast-iron radiator condition weigh heavily on whether a fault is worth repairing or signals it is time to plan a replacement.
Need a licensed gas fitter for your hot water / boiler? Call CANRO at (604) 359-1081 — residential natural-gas heating and hot water across Metro Vancouver since 1999.
Kerrisdale, centred around West 41st Avenue and West Boulevard, holds some of Vancouver's largest surviving character homes, many dating to the 1920s and 1930s with the deep lots and mature tree canopy the neighbourhood is known for. A meaningful number of these houses still run original or long-since-upgraded hydronic systems tied to cast-iron radiators, and later additions or basement renovations have often extended the piping runs well beyond what the boiler was originally sized to serve.
We also see a steady stream of newer, larger rebuilds in Kerrisdale where an older character house has been replaced entirely, and those homes typically run a modern condensing boiler with zoned radiant floor heat. The service issues on these two ends of the age spectrum look almost nothing alike, which is part of why an accurate diagnosis matters more here than a guess based on the boiler's age alone.
On older systems, the recurring pattern is a boiler that short-cycles or won't hold a flame, often traced to a fouled flame sensor, a weak igniter, or a circulator pump that has slowed enough to reduce water flow past the sensor. Pressure loss is another frequent complaint, usually from a slow weep at an aging expansion tank, a pressure relief valve past its service life, or a fitting somewhere in a long original piping run that has simply corroded over the decades.
| Symptom | Likely Cause | What We Check First |
|---|---|---|
| Boiler ignites then shuts off | Fouled flame sensor, weak flow | Sensor condition, circulator operation |
| Pressure drops week to week | Slow weep, aging expansion tank | Full pressure test of the loop |
| Upstairs radiators stay cool | Air lock, sludge in old piping | Bleed radiators, check circulation |
| No ignition at all | Gas valve, control board, igniter | Step-through diagnostic sequence |
Homes with original cast-iron radiators sometimes accumulate internal sludge over many decades of operation, and that sediment can settle in the lowest or farthest radiator on the loop, leaving it stubbornly cool even after bleeding air from the system. This is a slower, more involved fix than a simple air bleed, and we explain that difference before starting work.
For a boiler that is still within a normal working life, most single-component failures such as a circulator pump, expansion tank, or zone valve are worth repairing outright. Where we start recommending a longer conversation about replacement is when the heat exchanger itself shows corrosion, when a homeowner is facing a second or third significant repair within a couple of years, or when the original piping and radiators can no longer be matched to parts without significant custom work.
A full boiler replacement for a Kerrisdale home, particularly one serving an extensive radiator or radiant zone layout, typically falls in a ballpark of $6,500 to $14,000 or more, and that is a ballpark, not a quote; every home gets a written estimate after an on-site assessment of the existing distribution system.
On older Kerrisdale properties, we also take a moment to look at how previous renovations may have altered the piping layout, since additions and basement conversions over the decades sometimes left zones fed by undersized branch lines that never quite balanced correctly.
Safety note
If you smell gas, hear a hissing sound near the boiler, water heater, or gas line, or notice a yellow or lazy burner flame, soot, or a stale, headachy feeling near the mechanical room, leave the house right away and call FortisBC at 1-800-663-9911 from a safe location before doing anything else. Gas piping, venting, and combustion equipment must only be installed or serviced by a Technical Safety BC licensed gas fitter.
This is usually an air lock or, in older cast-iron systems, sediment that has settled in that branch of the loop. A technician can bleed the line and, if sediment is the cause, discuss a more thorough flush.
Annual service is a reasonable expectation for any gas boiler, and older systems in particular benefit from a yearly check of pressure, combustion, and circulator condition to catch small issues before they become failures.
In many cases yes, provided they are not leaking or badly corroded internally; a technician tests them for compatibility with the new boiler's output and flow requirements during the assessment.
A slow weep at the expansion tank, pressure relief valve, or an aging fitting can lose pressure gradually without an obvious puddle. A pressure test isolates the source.
Age of the unit, condition of the heat exchanger, and how often you've called for service recently are the main factors; a technician can give you an honest read after inspecting the system rather than guessing from the boiler's age alone.
Family-run, TSBC-licensed (gas LGA0043870 · boiler LBP0046450), serving Metro Vancouver homes since 1999. Residential, natural gas only.
Call (604) 359-1081 Email info@canroheat.ca“Canro does an amazing job! Super professional and skilled with everything—boilers, furnaces, and AC. Always a pleasure working with them!”
“Five stars for Canro. We needed a replacement of a 30-year-old boiler. A new high-efficiency unit was installed—clean, professional work.”
“I can’t speak highly enough about George, who was recommended for a boiler service call for my parents’ home. George is excellent.”
25+ years keeping Metro Vancouver homes comfortable. Honest advice, upfront pricing, work that lasts.