2 min read
Aug 4, 2025 1:00:00 PM

Thankfully, with good maintenance, the reliability of modern combi boilers means that repairs are a rarity. Proactive techniques such as annual servicing can identify issues long before they become a problem. This is important, as most home insurance policies do not cover boiler repairs.

If the worst does happen, here’s what to expect.

General Repairs

Most boilers are constructed from six main parts. These are the fan, the gas valve, the diverter valve, the heat exchanger, the primary circuit board (PCB), and various pumps. There are different costs related to fixing or replacing each of these. Generally, this will be in the range of £100 to £500. However, if you have a more complex problem, the cost can be significantly more. For instance, if a broken pump has caused an overheat that has cooked the valves and cracked the fan, you will need multiple parts repairing, which can add an extra zero to the price.

Emergency Boiler Repairs

Everyone dreads the thought of an emergency repair. Defined as a situation where the boiler has stopped working completely, emergency repairs require an urgent callout. For landlords, this is a legal requirement. The logistics of this mean that a premium is usually required, especially in the winter when boiler repairs are in high demand. Depending on the type of emergency, you can expect to pay anything from £222 to £600. This cost reflects both the labour and any necessary replacement parts.

Oil Boiler Repairs

78% of homes have a gas boiler, and only 5% have an oil boiler. As such, these pieces of antique design are something of a rarity and require an engineer with special experience. It is also harder to find replacement parts for oil boilers, so complex repairs are sometimes necessary. Basic costs are usually between £75 to £100, although this price will be dependent upon the age, type, and location of the boiler, as well as the complexity of the problem. In the case of oil boilers, it is usually financially more sensible to replace rather than repair your boiler.

What Is The Most Expensive Type Of Boiler Repair?

In a worst case scenario, it’s a freezing day at Christmas. Your boiler has been making strange sounds for a while, and you’ve ignored a few error codes by turning it off and on again. The hot water has been a bit sluggish, and your heating bills have been gradually getting higher. Then, you wake up in an ice-cold house, and the boiler is refusing to cooperate. It’s likely that the original problem was a dodgy valve. However, in this case, you’re looking at an emergency premium call-out, which can be up to £220 for a valve replacement – plus the cost of any additional damage. If luck has abandoned you completely, you may need a new boiler, which can cost up to £5,000.

Avoiding Boiler Repairs With Regular Servicing

Thankfully, you can almost completely eliminate the problem of boiler repairs with annual servicing and maintenance. This is a legal requirement for landlords, and a very sensible cost-saving strategy for homeowners. Costing between £87.50 to £110+VAT, routine servicing has multiple additional money saving benefits. For example, it ensures maximum efficiency, keeping energy bills to a minimum. Additionally, simple proactive maintenance adjustments can protect the most expensive parts of your boiler, greatly reducing the risk of financially perilous failures.

What Next?

The most cost-effective solution is to avoid boiler repairs altogether. To start preventing breakdowns on your boiler, contact us today.

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