Boiler service costs run about $425 on average, but can cost between $190 and $660 depending on the type of repair.
Boiler service costs average around $425. However, boiler servicing could run between $190 and $660, depending on type, replacement parts, and the cause of the problem. We’ll explain how to estimate your boiler repair cost in this guide.
A simple boiler repair starts at $100, but major issues can cost around $1,100, depending on what’s wrong with your boiler.
Even if your boiler is working fine, you should plan on spending between $200 and $500 for an annual boiler servicing. Routine checks are the best way to catch any issues early on and ensure that your boiler system is in tip-top shape.
During a routine service, the tech will:
Clean the unit, which may include a flush
Check for common issues like leaks and low water levels
Descale hard water
Replace parts that are prone to wear and tear
Conduct repairs
You can pay individually for different services rather than opt for an annual service contract, in which case you could expect to pay the following:
Annual inspection: $200–$400
Routine maintenance: $150–$400
Service call for repair: $75–$250
Boiler cleaning or descaling: $150–$350
Hourly rates for service and repair: $45–$200
Average repair costs: $150–$750
The cost of your boiler repair can vary widely depending on your boiler type: gas, electric, or oil. Boilers usually last 15 to 20 years, so if it’s more than 15 years old, your money is probably best spent on a new boiler rather than repairing your current unit.
| Boiler by Fuel Source | Average Cost Range for Repairs |
|---|---|
| Gas Boiler | $100–$400 |
| Electric Boiler | $200–$450 |
| Oil Boiler | $200–$500 |
Some repairs—like replacing the coil, circulating pump, or gas valve—can cost over $1,000. In these cases, it’s a good idea to weigh the pros and cons of purchasing a new unit instead of completing the repairs, especially if your boiler is near the end of its useful life.
| Boiler Replacement Part | Average Cost Range (Including Labor) | Boiler Part Function |
|---|---|---|
| Radiator Valve | $180–$330 | Controls how much hot water goes into each radiator |
| Transformer | $180–$500 | Supplies power to boiler |
| Zone Valve | $200–$500 | Controls flow of water and steam |
| Fan | $200–$500 | Pushes combustion fumes outside through flue |
| Expansion Tank – Electric | $200–$550 | Provides cushion for expanding water when heated |
| Expansion Tank – Gas | $200–$550 | Provides cushion for expanding water when heated |
| Expansion Tank – Oil | $250–$530 | Provides cushion for expanding water when heated |
| Flue | $300–$700 | Carries combustion fumes outside of home |
| Circulating Pump | $300–$1,000 | Pumps heated water through house |
| Gas Valve | $300–$1,100 | Controls flow of gas to burner |
| Coil | $500–$1,000 | Transfers heat from burner to water |
Here are some common boiler issues to help you estimate the cost of repairs.
A frequent boiler issue is a mineral deposit buildup. Your professional can remedy it with a power or chemical flush, which requires using hot water and chemicals at a high pressure to flush the system, while chemical flushes rely on chemical products rather than pressure to get the job done.
| Boiler Problem | Solution | Cost to Repair |
|---|---|---|
| Leak around boiler unit | Replace frozen condensate line, faulty expansion tank, or faulty valves, pipes, or seals | $140–$750 |
| Strange noises from boiler | Replace heat exchanger | $1,000–$2,000 |
| Unreliable heat | Power flush | $200–$600 |
If you turn on your boiler but it turns itself off, you may be dealing with a broken thermostat, faulty pipes, valves, circulator pipes, or low pressure. Repairs run from $250 to $1,000, depending on the underlying issue.
If your boiler won’t turn on at all, then you may be dealing with a variety of possible issues. For one, it could be a tripped circuit breaker or a bad fuse. These are the simplest issues to fix, and they usually cost around $75 if you need to call in an electrician. It may also be a faulty thermostat, frozen condensate pipe, clogged fuel line, or low pressure. You might be able to fix the frozen pipe by pouring hot water on it, but if the issues are stemming from somewhere else, you may need to spend about $270 to $1,800 to fix the problem.
Repairing a boiler with no water pressure can cost approximately $200 to $1,000. The best-case scenario is that you need to fix a water leak, although the issue could be faulty pipes, valves, or a malfunctioning circulating pump.
| Boiler Repair Problem | Average Cost Range for Material | Average Cost Range for Labor |
|---|---|---|
| Ignitor Switch | $25 – $150 | $100 – $200 |
| Faulty Expansion Tank | $40 – $130 | $100 – $250 |
| Faulty Circulator, Ductwork, Radiators | $150 – $350 | $250 – $500 |
| Faulty Pipes, Valves, or Circulator | $150 – $400 | $200 – $600 |
The costs associated with boiler servicing and repair are straightforward: You’ll need to pay for parts and labor. If your boiler is under warranty, there’s a good chance you won’t have to pay for parts. However, labor still makes up the majority of your boiler repair costs in most cases.
The individual parts for boiler repair can be as little as $10 or as much as $800. Often, a single repair can require multiple parts, so your total for parts could be higher. And generally speaking, it’s easier to find parts for gas boilers rather than electric or oil boilers, as they are the most prevalent type of boiler.
Techs usually charge for labor with a flat fee of $150 to $300 or with an hourly rate of $75 to $130 per hour. Expect to pay more if you need emergency service or after-hour help. Weekends and holidays tend to fetch the highest labor costs to account for the inconvenience. On the other hand, you’re likely to get better labor rates during regular maintenance servicing.
The British thermal unit (BTU) of your boiler isn’t going to change the cost of service or repair dramatically, as the components and labor generally cost about the same regardless of the boiler capacity. However, the size of your boiler will have a big impact on the costs of boiler installation, should a replacement be necessary.
For example, a 1,000-square-foot home likely needs a 30,000 to 45,000 BTU boiler that costs about $4,000 to $6,200, while a 2,500-square-foot home needs a 75,000 to 113,000 BTU boiler that ranges between $5,600 and $8,600.
Boilers are very complex systems, and tinkering with them can be extremely dangerous. Always hire a boiler repair pro near you to conduct any boiler servicing or repair.
While servicing or repairing is not advisable for the DIYer, there are some basic boiler maintenance tasks you can safely do. Visual inspections of the vents, chimney, and heat exchanger can help you spot issues so you can bring in a pro to fix them. You can also help ensure the longevity of the boiler by completing tasks like priming the circulating pump and replacing the filters.
Follow these tips and tricks to lower your boiler repair costs.
Hire a boiler technician during early spring for off-season pricing
Ask about discounts for signing annual service contracts
Check your boiler warranty and homeowner’s insurance for coverage
Schedule annual boiler service to avoid major issues
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We’ve surveyed thousands of real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
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Since your boiler keeps you warm and provides hot water to your home, you’re likely to notice issues with heating in your living space right away. The most obvious sign that your boiler is breaking is not getting any heat or hot water. You might also hear some odd sounds coming from your boiler during operation, the flame in your gas boiler is not blue, the pressure is inconsistent, or your boiler is using more energy than it should. If you notice any of these signs, be sure to call a pro right away.
Although boilers can last 15 to 20 years when maintained properly, you may run into some common problems like oil burners and transformers malfunctioning; cracks in the heat exchanger; clogs in the heating oil pump, burner nozzles, or fuel pipes; loose wiring connections; and damaged valves. Many of these problems can be caught early on during annual maintenance services. You might also have an issue with your fuel source if you have a gas or oil boiler. Make sure your other gas appliances are working or that you have oil in your tank.
To figure out if your boiler is worth repairing or if you need to replace your boiler, first figure out how old the unit is. Boilers last 15 to 20 years, so if your unit is 15 years old or older, it may be better to replace the entire thing depending on the severity of the problems. If it’s not quite that old, then it’s probably worth repairing. Another thing to consider is whether your warranty covers any of the repair costs. If so, it may be worthwhile to repair your boiler to keep it running.
A poorly maintained boiler can lead to serious issues like deadly carbon monoxide poisoning, so schedule regular maintenance services. Of course, it’s also a good idea to check your carbon monoxide detectors in your home to make sure they’re working properly. Moreover, when you forget to maintain your boiler, small problems can lead to something much more serious, which will cost you more money in the long run. Repairs average around $400, while a full replacement can total over $6,000.
