How Much Does It Cost to Service or Repair a Boiler? [2024 Data]

Normal range: $190 - $658

Boiler service costs run about $424 on average, but can cost between $190 and $658 depending on the type of repair.

How we get this data
residential boiler heating system
Photo: Courtesy of Angi member David B. of Dedham, Massachusetts
Dan Simms
Written by Dan Simms
Contributing Writer
Updated August 23, 2024
residential boiler heating system
Photo: Courtesy of Angi member David B. of Dedham, Massachusetts

Boiler service costs average around $424. However, boiler servicing could run between $190 and $658, depending on type, replacement parts, and the cause of the problem. We’ll explain how to estimate your boiler repair cost in this guide.

See boiler repair costs in
your area
How we get this data
Normal range for U.S.
$190 - $658
  • Average
  • $424
  • Low end
  • $95
  • high end
  • $1,500
LOWHIGH

How Much Does It Cost to Service or Repair a Boiler?

A simple boiler repair starts at $100, but major issues can cost around $1,100, depending on what’s wrong with your boiler.

Service

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

How Much Does Boiler Repair Cost by Type?

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 SourceAverage Cost Range for Repairs
Gas Boiler$100–$400
Electric Boiler$200–$450
Oil Boiler$200–$500

Repair Cost by Part

16 parts of a gas boiler illustrated, including air vent, drain valve, and circulator pump

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 PartAverage Cost Range (Including Labor)Boiler Part Function
Radiator Valve$180–$330Controls how much hot water goes into each radiator
Transformer$180–$500Supplies power to boiler
Zone Valve$200–$500Controls flow of water and steam
Fan$200–$500Pushes combustion fumes outside through flue
Expansion Tank – Electric$200–$550Provides cushion for expanding water when heated
Expansion Tank – Gas$200–$550Provides cushion for expanding water when heated
Expansion Tank – Oil$250–$530Provides cushion for expanding water when heated
Flue$300–$700Carries combustion fumes outside of home
Circulating Pump$300–$1,000Pumps heated water through house
Gas Valve$300–$1,100Controls flow of gas to burner
Coil$500–$1,000Transfers heat from burner to water

Repair Cost by Common Issues

Here are some common boiler issues to help you estimate the cost of repairs.

Leaks, Strange Noises, and Unreliable Heat

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 ProblemSolutionCost to Repair
Leak around boiler unitReplace frozen condensate line, faulty expansion tank, or faulty valves, pipes, or seals$140–$750
Strange noises from boilerReplace heat exchanger$1,000–$2,000
Unreliable heatPower flush$200–$600

Boiler Turns Off Unexpectedly

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.

Boiler Won’t Turn On

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.

Boiler Has No Water Pressure

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 ProblemAverage 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

Boiler Servicing and Repair Cost Breakdown

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.

Parts

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.

Labor

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.

Size

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.

Cost to Service and Repair a Boiler Yourself

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.

Tips to Reduce Cost While Repairing or Servicing Your Boiler

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

How Angi Gets Its Cost Data

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. 

Want to help us improve our cost data? Send us a recent project quote to costquotes@angi.com. Quotes and personal information will not be shared publicly.

Frequently Asked Questions

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.

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Learn more about our contributor
Dan Simms
Written by Dan Simms
Contributing Writer
Dan is a writer and property manager and can be found sharing his home improvement tips on sites like EcoWatch and Today’s Homeowner. He loves sharing his years of hands-on experience and love of DIY to help homeowners bring their visions to life.
Dan is a writer and property manager and can be found sharing his home improvement tips on sites like EcoWatch and Today’s Homeowner. He loves sharing his years of hands-on experience and love of DIY to help homeowners bring their visions to life.
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