Boiler Repair Costs 2019: How Much Should You Be Paying?

The cost of a boiler repair will vary depending on the severity of the fault or damage. You should expect to pay around £100 to £200 for a minor fault such as a replacement timer or air vent, whereas you'll pay closer to £400 for a more serious fault, such as replacing a heat exchanger.

Throughout its lifespan your boiler is likely to need repairing for reasons such as faulty parts (like the pump or gas valve) or from everyday wear and tear. An annual boiler service will help to spot any problems before they get too serious and cause your boiler to break down completely.

If your boiler does need repairing, it’s important that you enlist the help of a qualified engineer who is Gas Safe or OFTEC registered. Attempting to fix it yourself without any experience can be dangerous and cause your boiler to become unsafe. It could also compromise your home insurance and boiler warranty if anything goes wrong.

boiler repair costs

What's in This Guide to Boiler Repair Costs?

How Much Do Boiler Repairs Cost?

Boiler repairs typically cost between £100 and £400, depending on the severity of the fault or damage. Minor faults such as a replacement timer or air pressure switch will cost you about £100 to £200, while more serious faults such as a replacement diverter valve or heat exchanger will cost closer to £400.

The average cost of repairing a boiler is £314*

*According to the comparison service, uSwitch.

This table shows you the cost of replacing different boiler parts:

Boiler Repair
Automatic air vent
Air pressure switch
Printed circuit board
Diverter valve
Heat exchanger

*Prices include labour costs

You may not necessarily need to completely replace the boiler part that is faulty. In some cases, it could just need a good clean or recondition which will cost you a lot less. For example, an engineer may be able to fix a faulty fan by simply changing its motor.

The amount you’ll be charged for a boiler repair will vary between engineers. Large national companies can sometimes charge up to 50% more than small local businesses for the same work. To avoid getting overcharged, it’s a good idea to shop around and get a few quotes before you choose an engineer to carry out the repair work.

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What Can Affect the Cost of Boiler Repairs?

There are certain factors which may affect the cost of your boiler repair, including:

  • Your location: boiler engineers charge different rates depending on your location in the UK. For example, engineers in London tend to charge double that of engineers in northern England.

  • The company repairing your boiler: small local businesses tend to charge significantly less for the same repair as large national companies.

  • The type of boiler: larger and more complex boilers typically cost more to repair. For example, a faulty conventional boiler will often cost more to fix than a combi boiler because the heating system is made up of many more parts.

  • The availability of spare parts: if your boiler is an old or unpopular model, it may be difficult to source replacement parts. This can push up the cost of repair, particularly if parts need to be specially ordered.

  • The cost of spare parts: if the part that needs repairing is crucial to the functioning of your boiler, it will cost more to fix. For example, a boiler’s circuit board will cost twice as much to repair as its timer.

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Fixed Price Boiler Repair Vs Time-Based Boiler Repair

There are 2 types of boiler repairs: fixed price repairs and time-based repairs. A fixed price repair means that you pay a set price for a one-off boiler repair. For this work, you’ll receive a quote which includes the total cost of replacement parts and labour. The figures in the table above are all fixed price repairs.

Time-based repairs, however, are priced by the amount of time it takes to repair a boiler. The longer a fault takes to fix, the more you’ll be charged by an engineer. If the repair work takes longer than originally estimated, a time-based repair could end up costing you a lot more than a fixed price repair.

The table below shows you how much a selection of large national firms charge for a fixed price repair and a time-based repair.

Fixed Price Boiler Repair
Time-Based Boiler Repair
British Gas
From £99
From £79
EDF Energy
From £99
From £75
Scottish Power
From £78
From £78

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Boiler Repair Protection

If your boiler is within its warranty period, you probably won’t need to pay for any repairs. Warranties typically last between 2 and 5 years from the time you bought your boiler, but they can be longer.

If you take out boiler cover that includes repairs to your system and its controls, you can also protect yourself from having to cough up money to fix faulty parts. The cost of boiler cover varies between providers, but you can expect to pay around £10 to £20 per month.

If your boiler warranty has expired, taking out boiler cover is a good idea to make sure you don’t have to pay for any (potentially expensive) one-off repairs in the future. Always check what your boiler cover includes, however; you might find that it restricts how many claims you can make in a year, or has a cap on the cost of each repair.

Here are some examples of how much boiler cover costs per month with well-known companies in the UK:

Boiler Cover Cost (per Month)
British Gas
From £12
EDF Energy
From £13.29
From £13
Scottish Power
From £13.13
24/7 Home Rescue
From £9.60

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The Importance of Build Quality

The build quality of your boiler will make a huge difference in how often it will need repairing. The better the quality of a boiler, the less prone it should be to faults and so the less money you’ll need to spend on having your boiler repaired.

We’d recommend buying a boiler from a brand such as Worcester Bosch, Viessmann or Vaillant, who all manufacture high quality central heating systems. Boilers made by brands like Ferroli and Vokera have been known to encounter more issues due to a poorer build standard.

Although good quality boilers often cost more, they are worth the investment as they will save you a lot more time and money in the long-term. If you want to find out what boiler brands we recommend, visit our guide to the best boilers.

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When Should You Replace Your Boiler?

Inevitably, there will come a time in your boiler’s life when paying for repairs just isn’t worth it and investing in a replacement boiler is much more cost-effective. It might be time to replace your boiler if:

  • It’s approaching 15 years old
  • You’re always calling out a boiler engineer
  • Your energy bills are through the roof
  • It’s making strange noises or emitting a funny smell
  • It doesn’t heat your radiators or water very well

Replacing an old and/or inefficient boiler with a new boiler can save you a significant amount on your energy bills. These tables show the potential energy savings made each year by replacing a G-rated boiler with an A-rated boiler according to different-sized homes.

England, Scotland and Wales

Semi-Detached House
Detached House
Mid-Terrace House

Northern Ireland

Semi-Detached House
Detached House
Mid-Terrace House

To find out more about replacing your boiler, visit our guide on when to replace your boiler.

If you’d like to get an accurate quote on how much a new replacement boiler could cost you, hit the orange button below and fill in a short form with some basic details about you and your home.

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How long does it take to repair a boiler?

A simple boiler repair, like changing a faulty timer, usually takes about 1 to 2 hours to carry out. More complex boiler repairs, such as replacing the heat exchanger, can take several days to complete.

Who should repair a boiler?

Never attempt to repair a boiler yourself - it can be dangerous and make your boiler unsafe. Always use a fully qualified boiler engineer. If you have a gas boiler, make sure you hire a Gas Safe registered engineer. If you have an oil boiler, you should use an OFTEC registered engineer.

What is a boiler service?

A boiler service is a physical examination of your boiler by a qualified engineer to check that it’s working safely and properly. Checks that an engineer will carry out include testing its parts and controls, and looking for any signs of corrosion or leaks. A boiler service should be carried out once a year and will take about 30 minutes to complete.

What is the cost of a boiler service?

A boiler service costs anywhere from £60 to over £100. How much you pay will depend on a number of factors, including the age and model of your boiler and who carries out the service. You can pay for a one-off boiler service or take out monthly boiler cover that includes boiler servicing in its cost.

How much does it cost to replace a boiler?

It costs anywhere from £580 to over £4,000 for a replacement boiler, with installation costing around £500 to £1,500 on top. The amount you’ll pay will depend on what type of replacement boiler you need and where it’s installed, its size and efficiency, and what brand it’s made by.

Get a Free Quote for a New Boiler

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