Why Tankless Leak Costs Vary So Much
There is no single price for a leaking tankless water heater, because the word "leak" covers everything from a dripping bleeder cap to a cracked heat exchanger. The cost depends almost entirely on what is actually leaking, how accessible the part is, and whether the unit is still under warranty.
In Greater Vancouver, the most common leaks are at external fittings and condensate lines, which sit at the affordable end. Internal component leaks fall in the middle. A failed heat exchanger sits at the top, sometimes approaching replacement cost. The honest answer to "what will this cost" is always: it depends on the diagnosis. That is why we quote after seeing the unit rather than over the phone. For an exact quote on your specific situation, call 604-359-1081.
Typical Cost Ranges by Cause
These are general ranges for Greater Vancouver to help you set expectations. Your exact figure depends on the unit, the parts, and warranty status — call 604-359-1081 for a precise quote.
Condensate line or neutralizer fix: the lower end of the range. Clearing or re-routing a drain or swapping a neutralizer cartridge is usually a short visit.
Isolation/service valve replacement: low to moderate. The valves and bleeder caps are relatively inexpensive parts.
Pressure relief valve replacement plus pressure correction: low to moderate, more if an expansion tank or pressure-reducing valve is needed for the home.
Internal gasket, flow sensor, or pump seal: moderate, driven by part cost and labour to open the unit.
Heat exchanger replacement: the high end, sometimes nearing the cost of a new unit — which is why warranty status and unit age weigh heavily here.
Warranty Can Change the Math Completely
Before assuming a heat exchanger leak means a big bill, check the warranty. Most major tankless brands sold in BC — Navien, Rinnai, Noritz, Bosch — back their heat exchangers for many years (often 10–15 on residential units), and a unit that qualifies may get the part covered even if labour is not.
That single factor can swing a heat-exchanger repair from "replace the whole unit" to "worth fixing." Proof of professional installation and, in some cases, evidence of periodic maintenance can be required to honour the warranty, so keep your records. When you call CanroHeat at 604-359-1081, we will help you verify your unit's warranty status as part of the diagnosis, so the repair-versus-replace decision is based on real numbers rather than guesswork.
Repair or Replace? A Practical Rule of Thumb
A reasonable guideline: if the leak is at a fitting, valve, or condensate line, repair almost always makes sense regardless of unit age. If the leak is the heat exchanger and the unit is under warranty, repair is usually still the better value. If the heat exchanger has failed and the unit is well out of warranty and over ten years old, replacement often wins on long-term cost and reliability.
Freeze damage and heavy scale are special cases — they can damage multiple internal parts at once, which tips the scale toward replacement even on a mid-life unit. Tankless water heaters are serviced by our parent company, CanroHeat. We will give you a clear written quote, lay out the repair and replacement options side by side, and never push you toward the more expensive path. Call CanroHeat at 604-359-1081 for a tankless leak diagnosis and an exact quote.