The short answer
An annual boiler service visit — a tune-up, not a repair — typically costs $150 to $350 in eastern Massachusetts, depending on fuel type and whether it is a straightforward gas unit or an oil boiler that needs a nozzle and filter change. A repair call is priced by the part: common fixes run $200 to $900 installed, with a circulator pump, gas valve or control board at the top of that range. These are typical ranges we see around Lynnfield and the North Shore; the exact number depends on the boiler's age, the part involved and how the old install was piped, and we always quote the job in writing before starting.
Service vs. repair — what's the difference?
These are two different visits and two different price ranges, and it helps to know which one you need before you call.
- Service (tune-up). A scheduled, preventive visit — nothing is broken. We clean and inspect the boiler, test the safety controls, check combustion, and catch small problems before they become no-heat calls. Oil boilers also get a nozzle, filter and strainer change every visit; gas boilers usually do not need parts unless something tests out of range.
- Repair. The boiler has an active problem — no heat, a leak, a lockout code, a noise — and a specific part needs diagnosis and replacement. Repairs are priced by the part and the labor to access it, not as a flat visit fee.
If your boiler is short-cycling, banging or refusing to fire, that is a repair call — our guide to boiler not heating or making noise walks through what each symptom usually means before you book anything.
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What does an annual service visit include?
A proper tune-up is more than a five-minute look. On a typical residential gas boiler we check and do the following:
- Combustion test. Measure flue gas to confirm the boiler is burning efficiently and safely, not just that it lights.
- Clean the burner and heat exchanger where the design allows access, removing soot and scale that reduce efficiency.
- Test the safety controls — low-water cutoff, pressure relief valve, high-limit aquastat — the parts that keep the system safe, not just running.
- Check system pressure and the expansion tank for waterlogging, and top off or bleed air from zones as needed.
- Inspect venting and the flue for blockage, corrosion or improper draft.
- Test zone valves and the circulator pump for proper operation on each zone.
- Check for leaks at unions, valves and near-boiler piping while the system is under pressure.
Oil boilers get all of the above plus a new nozzle, oil filter and strainer, and a smoke test — parts and combustion drift out of tune on oil systems faster than on gas, which is part of why the visit costs more and why annual service is not optional on an oil unit.
What drives a repair price?
"Boiler repair" covers a wide range of jobs. These are the calls we see most often, in roughly the order they show up:
- Igniter or pilot assembly. A failed hot-surface igniter or flame sensor is one of the most common no-heat calls and one of the less expensive repairs.
- Circulator pump. Moves hot water through the zones; when it seizes or the bearings fail, that zone (or the whole system) goes cold. One of the pricier common repairs because of the labor to isolate and replace it.
- Zone valve. A single zone that never gets hot, or that runs when it shouldn't, usually points to a stuck or failed zone valve motor.
- Expansion tank. A waterlogged tank (no longer holding an air cushion) shows up as a pressure gauge that won't hold steady or a relief valve that weeps. Usually a straightforward swap.
- Pressure relief valve. Dripping or failed relief valves are a safety item, not optional to ignore, and are a lower-cost repair on their own.
- Low-water cutoff. A required safety device on most boilers; when it fails it can either shut the boiler down unnecessarily or, worse, not shut it down when it should. Testing this is part of every tune-up for a reason.
- Gas valve or control board. The most expensive common repairs. A control board failure can look identical to a dozen smaller problems until it's diagnosed, which is why an accurate diagnosis matters before you agree to a price.
Two other things move the number regardless of which part fails: how old and how accessible the boiler is. A 20-year-old unit tucked in a low crawlspace takes longer to work on than a five-year-old boiler with clear access, and that labor time is part of every quote.
Typical cost ranges
These are the ranges we see for the calls above, installed, in eastern Massachusetts. Ask what is and is not included if a quote lands well outside them.
| Visit or part | Typical range | Notes |
|---|---|---|
| Annual tune-up, gas boiler | $150 – $300 | Inspection, cleaning, safety-control test |
| Annual tune-up, oil boiler | $200 – $350 | Includes nozzle, filter, strainer, smoke test |
| Diagnostic / trip fee | $100 – $175 | Applied to the repair if you move ahead |
| Igniter or flame sensor | $200 – $400 | Common no-heat repair |
| Zone valve | $250 – $500 | Per zone |
| Expansion tank | $250 – $450 | Waterlogged tank replacement |
| Pressure relief valve | $175 – $350 | Safety device — never cap it, replace it |
| Circulator pump | $400 – $750 | One of the higher-labor repairs |
| Gas valve or control board | $450 – $900 | Highest range; accurate diagnosis matters |
These are typical ranges, not a quote for your boiler — the exact price depends on the make, the part's availability and how the near-boiler piping was originally run. We price every repair in writing before we start.
How often should a boiler be serviced?
- Gas boilers: once a year, ideally in late summer or early fall before heating season starts. Gas systems drift out of tune more slowly than oil, but the safety-control checks still matter every year.
- Oil boilers: once a year, no exceptions. Oil combustion is more sensitive to a dirty nozzle and filter, efficiency drops faster between services, and most oil boiler warranties require annual service to stay valid.
Scheduling service before winter, rather than after the first cold snap, is the difference between a routine appointment and an emergency call during the busiest week of the year.
When is a repair not worth it?
Most repairs on a boiler under 12–15 years old are worth doing — a $400 circulator pump on a boiler with years of life left is routine. The math changes when:
- The boiler is 15–20+ years old and the repair is a large fraction of what a new unit would cost.
- You're looking at a second major repair within a year or two of the last one.
- The heat exchanger is cracked or a section is leaking — there is no economical repair for this.
- Fuel bills have been climbing with no change in use, alongside frequent lockouts.
In any of those cases, our boiler replacement cost guide covers installed price ranges by boiler type so you can compare the repair quote against a new unit before deciding. If your boiler is making noise or not heating at all, start with our boiler not heating or making noise guide to narrow down what's actually wrong. Precision Plumbing Solutions services and repairs boilers of all makes across Essex, Middlesex, Suffolk, Norfolk and Plymouth Counties — see the boiler installation & repair service page for details, or call us for a same-day reply.
Questions people ask
How much does a boiler tune-up cost?
A standard annual service visit for a residential gas boiler typically runs $150 to $300 in eastern Massachusetts. Oil boiler service, which includes a nozzle and filter change, usually runs $200 to $350.
Is boiler service worth it every year?
Yes for both fuel types. An unserviced boiler loses combustion efficiency gradually, and several of the parts that cause no-heat calls — igniters, low-water cutoffs, safety switches — are the same parts a tune-up tests. Oil boilers need the annual visit to keep the manufacturer warranty valid.
Why did my boiler repair quote seem high?
Circulator pumps, gas valves and control boards are the most expensive common repairs, often $400–$900 installed. If several parts have failed at once, or the boiler needs to be drained and refilled to reach the part, labor time adds up quickly.
Do you charge for a diagnostic visit?
We quote a flat diagnostic and trip fee up front, and if you move ahead with the repair that fee is applied to the job. You always see the price before any work starts.
