How Much Does Boiler Repair Cost?
Boiler repair in 2026 usually runs between a small diagnostic fee and a few hundred dollars for common parts. A diagnostic visit costs about $75 to $150, often credited toward the work. From there, price depends on the part: a circulator pump runs $400 to $800 installed, an expansion tank $300 to $600, and an ignition or igniter repair $200 to $500. Labor and part availability drive most of the range. Older Frederick boilers can cost more when parts are hard to source. A clear quote should separate diagnosis, parts, and labor.
Common boiler repairs and typical 2026 cost
| Repair | Typical cost |
|---|---|
| Diagnostic visit | $75-$150 (often credited) |
| Circulator pump replacement | $400-$800 |
| Expansion tank replacement | $300-$600 |
| Ignition or igniter repair | $200-$500 |
| Pressure relief valve | $150-$400 |
| Thermostat replacement | $150-$350 |
What drives boiler repair prices
Three things set the price of any boiler repair: the part, the labor, and how hard the part is to find. A diagnostic visit is the starting point, usually $75 to $150, and most honest shops credit that fee toward the work if you approve it. From there, the failed component decides the rest of the bill.
Common parts fall into predictable ranges. A circulator pump, which moves hot water through the loop, runs $400 to $800 installed. An expansion tank lands around $300 to $600, and an ignition or igniter fix sits at $200 to $500. A single boiler repair visit can often diagnose and fix these in one trip, which keeps labor down.
- Diagnostic fees run $75-$150 and are often credited toward the repair.
- Circulator pumps, the priciest common part, run $400-$800 installed.
- Older or imported boilers cost more when parts must be special-ordered.
Repair or replace: making the call
Cost alone should not decide repair versus replace — age matters too. A boiler under 15 years old is usually worth fixing. Past 20 years, repeated repairs add up fast. If your boiler runs but won't heat, start with our guide on why a boiler stops producing heat to see whether the fix is small.
Recurring problems change the math. A boiler that keeps losing pressure may need several parts before it holds, so read why a boiler keeps losing pressure before paying for a single fix. And never let a low quote tempt you into gas-side DIY — if you smell gas, leave the house and call the utility. Gas work belongs to a licensed pro.
- A boiler under 15 years old is usually worth repairing.
- Get an itemized quote that separates diagnosis, parts, and labor.
- Leave gas-side work to a licensed technician; DIY risks safety and warranty.
Questions homeowners ask next
How Much Does Boiler Repair Cost?
In 2026, expect a $75 to $150 diagnostic fee, often credited toward the work. Common repairs run: circulator pump $400 to $800, expansion tank $300 to $600, and ignition repair $200 to $500. Labor and part availability set the range.
Is a diagnostic fee credited toward the repair?
Most reputable shops credit the $75 to $150 diagnostic fee toward the repair if you approve the work. Ask upfront so you know whether the fee stands alone or applies to the final bill.
When is replacing a boiler cheaper than repairing it?
Once a boiler passes 20 years and needs repeated repairs, replacement usually wins. If a single fix costs more than a third of a new unit and the boiler is old, put the money toward replacement.