The average cost of boiler repair is £170 to £360 for the most common repairs. There is a list of itemized repairs below.
The most expensive boiler repair is the heat exchanger at £385 to £470. If your heat exchanger fails and the boiler isn’t covered by warranty, then it’s probably time to examine the cost for boiler replacement instead of repair.
Whether to repair or replace is discussed in more detail in the FAQs at the end of the post.