Thermocouple Replacement Cost — Furnace & Boiler (U.S., 2026)
Estimated $100–$400 for a thermocouple replacement in the U.S., depending on the HVAC system and the exact fault. Built from 2 sourced repair jobs across 2 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a thermocouple 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 | Pilot light / thermocouple won't stay lit | Thermocouple cleaning/replacement | $5–$25 | $150–$300 | DIY possible |
| Boiler | Pilot light won't stay lit | Thermocouple replacement | $15–$50 | $100–$400 | DIY possible |
Base: 1 published national repair-cost guide (full source registry on the methodology page), published rates from 2 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 thermocouple 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).