Why There's No Single Price for a Leak
"How much to fix a leaking boiler?" is one of the first questions we hear — and the honest answer is that it depends entirely on the source. A leaking boiler can mean a five-dollar gasket or a failed heat exchanger that argues for a whole new unit. Those are wildly different jobs, so any company quoting a flat price sight-unseen is guessing.
The cost is driven by three things: the part that's failed, the labour and access required to reach it, and your specific boiler brand and model (parts pricing on Navien, Viessmann, IBC, and Rinnai all differ). A leak behind a wall-hung combi in a tight closet takes more time than one on an accessible system boiler in a garage.
What we can do is walk you through the typical ranges by leak type so you understand what affects the bill before we arrive. For an exact figure, call 604-359-1081 and we'll quote after a proper diagnosis.
Lower-Cost Repairs
At the more affordable end are seal, gasket, and valve repairs. A worn pressure relief valve, a dripping auto air vent, a perished union gasket, or a loose fitting are all relatively quick fixes for a technician. The parts themselves are inexpensive, and the labour is modest because access is usually straightforward.
These are also the most common leaks we find, which is good news — many of the boiler leaks reported in Greater Vancouver homes turn out to be at this end of the scale once diagnosed. Catching them early keeps them here, too. A small weep left for months can corrode surrounding components and turn a minor job into a larger one.
We'll always tell you when a leak is a simple fix rather than upselling you toward unnecessary work.
Mid-Range Repairs
In the middle sit component replacements that take more parts cost, more labour, or both. A circulator pump that's leaking from its seal (or on its way to a bearing failure), a waterlogged expansion vessel that needs replacing rather than recharging, or a diverter valve with worn seals all fall here.
These repairs often involve partially draining the system, isolating the boiler, and fitting a manufacturer-specific part — which is why brand and model matter to the price. A genuine Viessmann or Navien part costs more than a generic equivalent but is the right choice for reliability and warranty.
This tier is where a proper diagnosis pays for itself: replacing the wrong component because of a rushed guess is the most expensive mistake of all.
Higher-Cost Repairs and the Replace Decision
At the top end is the heat exchanger — the single most expensive component in any boiler. A cracked or corroded heat exchanger is a major repair involving significant parts and labour, and on a boiler over roughly 12–15 years old the cost frequently approaches that of a new high-efficiency unit.
When we find a failed heat exchanger we give you the full picture: the repair cost, the likely remaining life of the rest of the unit, and what a replacement would cost — including any FortisBC or federal rebates you may qualify for on a high-efficiency upgrade. Sometimes repair makes sense; often, on an older boiler, replacement is the better long-term value.
We never push replacement on a boiler that has good years left, and we never sink your money into a heat exchanger on a unit that's clearly at end of life. You get the numbers and the honest recommendation.
Getting an Exact Quote
Because leak repair pricing genuinely depends on what we find, we quote after diagnosing — not before. Our technician confirms the source, shows you what's failed, and gives you a clear, written price before any work begins. No surprises.
GasBoilers.ca is a CanroHeat Division serving Vancouver, Burnaby, Surrey, Richmond, Coquitlam, the North Shore and the rest of Greater Vancouver, with same-day and weekend availability where possible. Call 604-359-1081 for an exact quote on your boiler leak.