Boiler repair costs $150 to $750 for most jobs, with national averages of $425 and $450.1,2 Simple fixes start around $100; major component replacements can pass $1,100. Prices below are national averages* for 2026.
*National averages, not local quotes. Your price depends on fuel type, the failed part, and local labor rates.
$425
average repair (Angi, 5,251 projects)
$450
national average (Fixr)
$190 – $660
what most pay (Angi)
$150 – $500
annual service (Angi, Forbes)
What sources say
| Source | Figure | Scope |
|---|---|---|
| Angi | $425 average; most pay $190 – $660 | 5,251 verified projects |
| Fixr | $450 average; $150 – $750 typical | Cost guide |
| Thumbtack | $184 – $793 typical range | Marketplace data |
| Forbes Home | $400 – $2,500 for repairs | Cost guide |
Forbes’ range runs well above the project-data sources. Its scope covers repairs of all sizes up to multi-issue jobs, while Angi’s and Thumbtack’s numbers come from what customers actually paid on completed jobs. Budget typical jobs from the project-data sources; Forbes’ range shows where repairs can land when a pro finds several issues at once.
Cost by fuel type
| Fuel | Angi | Fixr |
|---|---|---|
| Gas | $100 – $400 | $100 – $400 |
| Electric | $200 – $450 | $200 – $500 |
| Oil | $200 – $500 | $200 – $550 |
Both sources agree gas boilers are the cheapest to repair and oil the most expensive: oil units run dirtier and their burner components need more frequent service.1,2
Cost by part
| Part | Forbes (avg) | Angi (range) |
|---|---|---|
| Ignition switch | $175 | — |
| Zone valve | $200 | $200 – $500 |
| Gas valve | $200 | — |
| Igniter | $330 | — |
| Transformer | $380 | $180 – $500 |
| Fan | $400 | — |
| Flue | $600 | — |
| Radiator valve | — | $180 – $330 |
Service calls and annual maintenance
A service call for repair costs $75 to $250, and annual servicing runs $150 to $500 even when nothing is wrong.1,3 Hourly rates span $45 to $200 depending on market and experience.1,3 Forbes notes labor accounts for 15% to 60% of the total bill depending on the repair.3
Repair or replace
Boilers typically last 15 to 20 years. When a repair passes $1,000 on a unit approaching that age, replacement usually wins over continued repairs.1
Related guides
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Radiator Replacement and Installation Cost
Boiler Installation Cost
Furnace Repair Cost
HVAC Repair Cost
All cost guides
Sources
1. Angi — How Much Does Boiler Repair Cost?
2. Fixr — Boiler Repair Cost
3. Forbes Home — Boiler Service Costs
4. Thumbtack — Boiler Repair Cost