Heat Exchanger Replacement Cost — Furnace & Boiler (Canada, 2026)
Estimated $840–$5,500 CAD for a heat exchanger replacement in Canada, depending on the HVAC system and the exact fault. Built from 3 sourced repair jobs across 3 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a heat exchanger replacement costs, by HVAC and fault Estimated
Each row is a real sourced repair job whose description matched this part. Parts and total are that job's own national range — follow the problem link to localize it to your area.
| HVAC | Problem | Repair | Parts | Total | DIY |
|---|---|---|---|---|---|
| Gas Furnace | Cracked heat exchanger replacement | Cracked heat exchanger replacement | $500–$1,200 CAD | $1,500–$3,500 CAD | Pro recommended |
| Boiler | Leaking water | Heat exchanger replacement (cracked/corroded, high-ticket) | $500–$1,500 CAD | $840–$2,200 CAD | Pro recommended |
| Oil Furnace | Cracked heat exchanger / combustion chamber | Oil furnace heat exchanger replacement where the part is still available and the furnace is worth saving | $600–$1,600 CAD | $1,900–$5,500 CAD | Pro recommended |
Base: published rates from 15 Canadian repair companies · National base ranges — localize any figure on its linked problem page · Reviewed July 2026 · Estimated
Related HVAC cost guides
The full cost guide for each HVAC system a heat exchanger replacement shows up in:
Estimated national ranges aggregated from the linked problem pages — no per-page localization is applied here. See the methodology for the localization method and named sources.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).