The Most Common Causes of Boiler Breakdowns


Boiler breakdowns are a common occurrence in homes. They can be caused by many different issues, but there are some that are more likely to happen than others. Below, we’ve detailed the most common causes of boiler breakdowns and how you can avoid them happening to you and your family.

Over-sized Boiler

If you have an oversized boiler, it’s likely that the system is not balanced. This means that the heating and cooling systems are not working together as they should.

If your home is too large for its boiler, this can lead to overheating in some rooms and underheating in others. This will cause problems with humidity levels (which can lead to mold) and inefficient use of energy overall.

Unsuitable Boiler

If you are considering the purchase of a boiler, it is important that you get one that is suitable for your home. The size of the boiler must be appropriate for the size of your family and fuel type used.

If you have a large family and need to heat up water quickly, then this may mean installing a larger capacity model than if there were only one or two people living in the house. You should also consider whether there are any children in the house as they will require additional hot water during washing etcetera

Improperly Installed Boiler

  • Boiler installation should be done by a professional.
  • Boiler installation should be compliant with local regulations.
  • Boiler installation should be compliant with manufacturer’s specifications.
  • Boiler installation should be compliant with the Building Regulations

Damaged and Faulty Boiler Radiator or Pipework

  • Damaged and Faulty Boiler Radiator or Pipework
  • Pipes and radiators are damaged, blocked or leaking.
  • The pipes may have been damaged during installation or through general wear and tear, causing them to become rusty. If this happens, the boiler will not be able to heat your home properly because there won’t be enough heat being transferred into each room. It could also lead to water leaks in your home which can cause damage if left unattended for too long

Not Properly Serviced or Cared For

It’s important to service and maintain your boiler regularly. If you don’t, there are several things that can go wrong with it. For example, if there is a leak in the system and no one notices it before it becomes too serious, then there could be major damage done to your home or building. The same goes for clogged filters–if they aren’t regularly cleaned out, then this can lead to costly repairs down the line when everything starts overheating due to poor airflow through the system.

It’s also important not just because doing so will help keep costs down but also because proper servicing will ensure that your boiler continues working as efficiently as possible throughout its lifetime (which means longer life expectancy).

Poor Maintenance or Lack of Maintenance

Bad maintenance is the most common cause of boiler breakdowns. Boilers are a complex piece of machinery and if they’re not maintained regularly, they can easily break down. In fact, one in five boilers fail due to lack of maintenance or poor maintenance practices.

If you want your boiler to last longer than five years (and who doesn’t?), then it’s important that you get regular servicing from a qualified engineer who knows how best to keep your system running smoothly. You should also check over any work done by other people before signing off on any repairs or replacements as this will help ensure that everything is working as it should be when the job is done.


It’s important to ensure that your boiler is the right size and installed properly. You should also make sure it’s in good working order, and have it serviced regularly.

If you want to avoid boilers breaking down, these tips will help:

  • Have a professional installer install your boiler correctly. They’ll know what to look for when they’re installing it so that they can ensure everything goes smoothly and there are no mistakes made during installation. This way, if something does go wrong with your system later on down the line, then at least someone knows exactly where to start looking when trying to figure out why things aren’t working properly anymore!
  • Keep an eye on how much repair work needs doing every year–this will let you know whether or not something might need replacing soon (such as filters). If any part starts showing signs of wear-and-tear then consider replacing them before things get worse!


Hopefully, this article has helped you understand the most common causes of a boiler breakdown. We offer a 24/7 emergency call out service and can come out on site within hours if need

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