Heat Exchanger Replacement Cost — Furnace & Boiler (U.S., 2026)
Estimated $500–$5,000 for a heat exchanger replacement in the U.S., depending on the HVAC system and the exact fault. Built from 5 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 (standard job) | $350–$850 | $1,000–$3,000 | Pro recommended |
| Gas Furnace | Cracked heat exchanger replacement | Heat exchanger replacement (hard-access / high-labor case) | $500–$1,200 | $3,000–$5,000 | Pro recommended |
| Boiler | No hot water | Domestic hot water (plate/secondary) heat exchanger replacement | $150–$500 | $500–$1,000 | Pro recommended |
| Boiler | Leaking water | Heat exchanger replacement (cracked/corroded — high-ticket) | $500–$1,600 | $1,000–$3,000 | Pro recommended |
| Oil Furnace | Cracked heat exchanger / combustion chamber | Heat exchanger replacement on an oil-fired warm-air furnace, where the part is still available or covered by a parts warranty | $350–$1,200 | $1,000–$4,000 | Pro recommended |
Base: 3 published national repair-cost guides (full source registry on the methodology page), published rates from 9 local 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).