Why There's No Single Price for a Furnace Leak
The most common question we get is "how much will this cost?" — and the honest answer is that it depends entirely on why your furnace is leaking. A clogged drain line and a cracked heat exchanger are both "furnace leaks," but they sit at opposite ends of the cost spectrum.
That's why we never quote a furnace leak sight-unseen. A short diagnostic visit identifies the real cause, and from there we give you an exact, no-surprises price. What follows are realistic ranges to help you set expectations — not fixed prices, and not a substitute for a proper quote.
Furnaces in our area are serviced by our parent company, CanroHeat. For an exact quote after diagnosis, call 604-359-1081.
Cost by Cause: From Least to Most Expensive
Diagnostic / service call: a modest flat fee that's often credited toward the repair if you proceed. This is where the true cause is identified.
Clogged condensate drain line clearing: the lowest-cost repair, typically a budget-friendly range. Often the entire fix.
Air filter replacement / frozen coil thaw: inexpensive, sometimes resolved within the diagnostic visit if a dirty filter is the cause.
Condensate pump replacement: a moderate range, depending on the pump model and accessibility.
Condensate trap or drain re-piping: a moderate range, more if the line must be re-pitched or rebuilt.
Neutralizer cartridge refresh: a small add-on cost that protects far pricier plumbing.
Secondary heat exchanger or major component: a higher range, where age and warranty status start to factor into repair-versus-replace.
Cracked primary heat exchanger: the most significant cost, and the point at which replacing the furnace is often the better value.
What Makes the Price Go Up or Down
Several factors move a repair within its range. Accessibility matters — a furnace crammed into a tight closet or attic takes longer to service than one with clear access. Parts availability plays a role; common pump and trap parts are inexpensive and stocked, while brand-specific components may cost more.
Furnace age and warranty can dramatically change the math. A heat exchanger failure on a unit still under its 10–20 year warranty may mean you only pay labour. On an out-of-warranty 18-year-old furnace, that same failure often tips toward replacement.
Timing is a factor too — after-hours, weekend, or emergency calls carry different rates than scheduled weekday visits. And catching a leak early almost always costs less than letting acidic condensate damage your floors, subfloor, or the furnace base before you call.
Repair or Replace? An Honest Framework
A useful rule of thumb: if the repair costs less than a third of a new furnace and your unit is under 12–15 years old, repair almost always makes sense. As the repair cost climbs toward half the price of replacement — or the furnace passes 15 years with multiple recent issues — replacement becomes the smarter long-term value, especially given the efficiency gains of a modern unit.
Here in BC, replacement timing can also unlock rebates. FortisBC and federal programs periodically offer incentives on qualifying high-efficiency equipment, which can meaningfully shift the repair-versus-replace decision. We'll tell you honestly which way the numbers point for your specific situation — we'd rather earn a fair repair than oversell a replacement.
For a transparent assessment and an exact quote, call CanroHeat at 604-359-1081.
Get a Real Number, Not a Guess
Online ballpark figures are a starting point, but only a technician looking at your actual furnace can give you a price you can trust. CanroHeat provides clear diagnostics and exact quotes — no fabricated pricing, no pressure.
Serving Greater Vancouver with same-day and weekend availability in heating season. Call 604-359-1081 to book and get your exact quote.