The common boiler faults


Boilers are an important cog in the running of any household, providing the heat and hot water you’ll need throughout the year. Often they work without the need for any maintenance, but unfortunately problems do strike.

But what are the most common boiler faults and do you always need to call out an engineer to deal with the problem?
Well luckily, Which? have compiled a report on the UK’s most common boiler faults from customers who have had their system installed within the last six years. This concerns both oil and gas condensing boilers.

The most common gas boiler faults

Below you can see a list of the most common boiler faults where an engineer was needed to carry our repair work.


In total there were 5,115 responses for the survey and repair work was completed on each of the faults.
The most common oil boiler faults

The information below displays the most common oil boiler faults when an engineer was called out to complete repairs.


When will I need a new boiler?

What’s important to know is when it makes more financial sense to replace a boiler rather than have repair work carried out. So how will you know? A lot will come down to the cost repairs will be. If repairs are going to cost hundreds of pounds and your boiler is already 10 to 15 years old, then it’s probably time to replace.

With a modern boiler you can make savings up to £310 each year according to the Energy Saving Trust. This is because your old boiler could be working at just 70% and losing a lot of the heat you produce.


Facts & Figures You’ll Love To Share

  • Heating accounts for around 60% of the annual household bill and a new boiler can slash expenses.
  • By replacing your old and inefficient boiler you can save up to £310 a year according to the Energy Saving Trust.
  • Energy prices have doubled since 2004 and will double again by 2020, so secure your energy future with an A-rated boiler.
  • An annual boiler service costs between £50 and £100 but could save you hundreds of pounds on future repair work.
  • With a new boiler you can slash carbon dioxide emissions by a whopping 1,200kg each year.

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Tom Crosswell

I have been managing online projects since 1999 and I'm a experienced marketeer, who is well versed in international brand management, online business strategy and developing long term relationships. Through my academic and professional background I am a specialist in generating online loyalty towards brands. My experience has taught me that ultimately business is about relationships and people. For more information see my Google+ page.