Do I repair or replace my boiler?

09 February 2024

Factors to consider when deciding whether you need to repair or replace your boiler.

Is your boiler not running as efficiently as it used to? It is often difficult to discern whether your old boiler needs to be repaired or replaced, and you may wonder which route would be more cost effective. These are some factors that we suggest checking before deciding on choosing a simple repair or a newer boiler installation.



Firstly, it's important to find out how old your existing boiler system is. If it is between 8-10 years old, then the energy rating may not be as efficient as most newer high efficiency boilers. It may be beneficial, as energy prices are rising, to replace your existing boiler with a newer 'A' rated boiler to save you money on maintenance and fuel costs.



Boiler with thermostat in kitchen

Furthermore, if your boiler is near the 10-year mark, it is worth wondering whether the parts will still be available for repair. The older your boiler is, the more costly it would be to repair. 

If you're looking to get a new boiler installed in your home, you can get an estimated price and book an appointment for a time that suits you, using our handy online estimator. Or you can give the sales team a call today on 0800 731 33 44.


Most modern boilers are known to be much more compact and easier to fit into smaller spaces. Most old-fashioned boilers often come alongside a water tank which will be removable if you invest in a newer combi boiler. 


Old fashioned boiler systems often have fewer controls and less precision in heating and hot water.

However, modern boilers can be combined with smart heating thermostats and controls so that you have the ability to save more money by timing your heating. 


Person adjusting digital thermostat


It is suggested to replace your boiler if the rating is below A-rated. A-rated boilers provide over 90% efficiency, and switching from a lower rating could save you hundreds of pounds each year.*

Sounds or Smells

If your boiler starts making unusual noises, other than the general start up whirring, this suggests that something is wrong. Whilst carbon monoxide is odourless, when your boiler emits it due to a failure, there is sometimes a faint smell. This can also be discovered by dark marks around the casing of your boiler. CO is highly dangerous and immediate action should be taken. 


If your boiler is costing you over half its worth in repairs, it is probably time to replace. Don’t waste money by continuously repairing parts of your old boiler when it could be cheaper and more efficient to replace the entire system. If you'd like a more convenient way to spread the costs for a new boiler, we have a few finance options available.



Young boilers have occasional breakdowns, but that does not mean that they always require replacing. Most boilers come with at least a 2 year warranty, with brands such as Worcester Bosch offering a 10 year warranty. 


Your boiler may be between 8-10 years old but, if it is still fully functional, it may not always require replacing. Occasionally, there may be small faults that can be repaired. However, there would always be benefits to an upgrade. 

Your Engineer

Your engineer or installer is there to advise you on what will be a waste of your money. If your boiler is requesting constant repair, listen to the advice from your engineer about when it may be time to install a new model. 

At Swale Heating, you can fully put your trust in our engineers to give you the best advice on whether your boiler needs repairing or a replacement. All of our engineers are Gas Safe registered and we have a selection of other accreditations which you can read here.


By repairing rather than replacing, you are saving the upheaval of your home by avoiding a new installation. A repair takes a lot less time than a replacement, and would require you to stay home for longer for the engineer.


It is possible to lengthen the life of your boiler through filters and cleaning products. Cleaning your central heating can improve performance and efficiency levels, reduce operating costs and reduce the likelihood of future repairs. To find out more about the central heating system cleaning services that we offer click here.


Hand Bleeding Radiator with Key

To book a boiler repair click here or to get a free estimate for a new boiler installation click here.

If you need to contact us for any other queries you can WhatsApp us on 01795 503604, log into your online account here or use the Live Chat option on our website.


Information Source:

* The Heating Hub