When the situation is still under control, repair beats replacement. Repairing a boiler usually costs far less than buying a new one. It’s better not to delay; fix it before it’s too late.
Many homeowners neglect annual boiler servicing, which often leads to frequent repairs or, worse, complete replacement. Skipping early repair signs isn’t just a drain on your wallet — it can also endanger your health. Faulty boilers can leak carbon monoxide, an invisible and deadly gas. If your boiler is old, making strange noises, or leaving stains, you need to call in a repair service right away.
The next big question is cost. A boiler repair cost can vary widely depending on several factors. Today, we’ll break down the average boiler repair expenses in detail. Let’s get started.
What is the average cost of a boiler repair in 2025?
Boiler repair or servicing is essential either as a routine annual check or if it’s behaving strangely. According to Checkatrade, repair costs usually range from £120 to £750, with an average of about £300. Keep in mind, these costs can fluctuate based on various factors.
How much does a boiler repair cost?
Boiler repair encompasses a wide range of services. That’s why the prices can differ significantly for various boiler services. Here’s a detailed look at what you can expect to pay for boiler repairs performed by expert heating engineers:
1. Typical Boiler Repair Ranges:
Boiler repair prices can differ from engineer to engineer. Typically, the average repair price sits around £300, but it can vary from £120 to £750, VAT included.
Labour Charges: Gas engineers charge hourly, usually between £50 and £80. When you factor in parts and labour, the typical hourly rate is about £65.
Emergency Repairs: When urgent repairs are needed, prices go up. Expect to pay between £100 and £500 for emergency boiler repairs, with an average cost of £410.
Boiler Insurance: Monthly premiums for boiler insurance tend to be between £8 and £30.
Cost of Boiler Replacement: Replacing a boiler generally costs upwards of £3,000
2. Boiler repair rates for individual boiler parts:
Sometimes, swapping out a single component can prevent the need for a full boiler replacement. Here’s an estimated average cost for partial boiler repairs:
| Boiler Parts | Estimated replacement cost |
| Boiler air vent | £115-£140 |
| Boiler Fan | £225-£275 |
| Gas Valve | £180-£220 |
| Water Circulating Pump | £150-£380 |
| Diverter Valve | £250-£375 |
| Pressure relief valve | £70-£150 |
| Ignition System | £100-£250 |
| Heat Exchanger | £400-£600 |
| Overheating Thermostat | £115 |
| Printed Circuit Board(PCB) | £300-£500 |
3. Annual Boiler Service Cost by Boiler Types:
Getting your boiler serviced annually ensures it runs smoothly, lasts longer, and validates your insurance. The average cost for a yearly boiler service is approximately £75. Here’s a breakdown of the typical servicing costs for different types of boilers:
| Boiler Type | Average Annual Boiler Service Cost Range |
| Combi Boiler | £80-£140 |
| Oil Boiler | £80-£140 |
| Conventional Boiler | £80-£140 |
| LPG Boiler | £80-£130 |
| Electric Boiler | £70-£110 |
| Biomass Boiler | £180-£450 |
What can affect the cost of fixing a boiler?
The cost of fixing a boiler can vary significantly from one gas engineer to another. However, several key factors influence the overall price. These factors include:
- Duration of Repair
When a repair takes longer, your bill will rise accordingly, since labour costs are billed hourly. Prolonged repairs mean more hours of work, which directly impacts your overall expenses.
- Boiler Service Location
Expect to pay a bit more if your boiler repair is in London or the South East, as these regions usually have higher service charges.
- Boiler Engineers’ Seasonal Demand
Boiler repair prices can vary throughout the year. Winter months tend to be more costly due to increased demand for urgent fixes during colder weather.
- Age of the Boiler
Older boilers are often more complicated to repair and may require more parts to be replaced, which bumps up the total cost.
- Type and Brand of Boiler
The kind of boiler (combi, electric, LPG) affects the repair cost. Plus, some brands are more expensive to fix because of the availability of parts and the complexity of repairs.
- Several Parts Replacement
More parts needing replacement equals higher costs, as parts and labour contribute to the final bill.
- Urgent Callout Fees
Urgent or after-hours repairs typically involve additional callout charges, reflecting the extra effort and inconvenience.
- Accessibility of the Boiler
Boilers placed in tricky spots or hard-to-reach areas will cost more to repair because they take more time and effort to access.
- Boiler Service Timing
Getting repairs done after-hours or on weekends usually comes with a higher price tag than scheduling them during normal working hours.
- Boiler Insurance Coverage
Having boiler insurance coverage can cut down your repair expenses, as many policies cover parts and labour costs.
Final words
Boiler repair costs can vary depending on several factors. To get the best deal, compare multiple quotes, analyse standard rates, and pick the most reliable one. Sometimes, a simple or partial repair can save you from a huge expense—you never know.
Avoid the headache of DIY repairs. Instead, hire professional boiler engineers who efficiently identify the root cause and fix the issue. Looking for trusted experts? Contact us today.
FAQ: Boiler repair expenses
What does a boiler repair include?
A boiler repair generally involves an inspection of the boiler, gas pressure, pipework, and flue. The engineer will also test safety devices, check for carbon monoxide or gas leaks, and clean internal parts.
How much is a boiler service in 2025?
In 2025, the average cost of a boiler repair service is around £300, while the typical annual boiler service costs about £75.
Why is boiler repair so expensive?
Boiler repairs can be expensive because of factors like age, type, parts that need replacing, a shortage of gas engineers, and seasonal demand spikes.
How can I reduce boiler repair costs?
Getting boiler cover is a smart way to lower repair costs. Regular servicing and bleeding radiators also help prevent major issues, saving you money over time.
Should a 20 year old boiler be replaced?
Most boilers last 10-15 years. If yours is 20 years old, it’s probably past its prime and should be replaced for efficiency and safety.
What is the most expensive part of a boiler?
The heat exchanger is the priciest part, as it transfers heat from combustion. It’s essentially the heart of the boiler.
