Your Guide to Boiler Error Codes and What They Mean
Most newer boiler models can last several years without encountering any issues, but others can feel like they’re more hassle than they’re worth at times. While boilers do need a certain degree of care, they should essentially run on their own, and definitely shouldn’t need repairing more than once or twice throughout their lifespan! So what causes the different boiler error codes in the first place, and what do they all mean?
In this guide, we’ll be making sure you’re clued up on some of the common boiler error codes you might encounter if you have a slightly older boiler (or a new model that’s playing up).
What causes boiler error codes?
As previously mentioned, most new boilers are reliable and are unlikely to cause you any issues. However, it’s worth noting that all boilers (and particularly combi boilers) are rather complex appliances, and are usually running all year round. Plus, boilers may rely on external pipes or water tanks to keep them functioning properly. All of this means that while they are unlikely to cause regular problems, there are still several potential faults you could encounter throughout the year.
Boiler error codes could imply any of the following:
A problem with the boiler unit
A problem with the pressure
An issue with the electric or gas supply
An issue with the condensate pipe
A boiler flue problem
It is also worth noting that a lot of boiler issues will require attention from a professional gas engineer. You will likely find information in your boiler handbook regarding how easily the problem can be solved, so be sure to consult this before attempting any fixes yourself.
What do the different boiler error codes mean?
Unfortunately, there is no quick answer to this question. Boiler error codes will always differ depending on the specific model of the boiler, and there are different numeric combinations that imply various fault types. The best place to find the answer to your error code query is in the boiler manual that you should have received when the boiler was installed.
However, while there is no simple way to cover all possible boiler error codes, we can of course cover the most popular types of error and what you might expect to see displayed on your unit.
Fault error: When you have a fault error, your boiler will display an alphanumeric fault code. You will find the corresponding description in your manual or online.
Blocking error: With blocking errors, no fault code will automatically appear. Instead, your boiler will stop operating completely. Pressing the ‘return’ button on your unit should display the error code.
Cause error: If you have pressed the ‘return’ button to access the code (either at any time or during a blocking error), a three-digit number will imply you have a cause error. This code should flash on the display during a locking error.
Locking error: Your unit will flash a warning triangle and a fault code. It may also display a static cause code. Once you have accessed professional help to fix your boiler, you will need to press the ‘reset’ button to clear the code.
Maintenance code: Usually you will find that a maintenance code is displayed with the letter H followed by a number. This code signals that you need to have your boiler assessed by a qualified engineer. Your unit should not cease to function in this scenario.
Some boiler models will display text instead of a code. Here are the common fault messages you may see displayed on your boiler, and what to do immediately:
Outside sensor fault: Restart the boiler, and if it continues to display the message, contact an engineer
Low mains voltage: Contact your electricity provider
Flame on before gas on: Restart the boiler, and if it continues to display the message, contact an engineer
Overheat lockout: Restart the boiler, and if it continues to display the message, contact an engineer
Too many resets: Switch your unit off and on again. If it still fails to operate, Turn the power off and on. If the boiler fails to operate, contact an engineer
Low water pressure: Repressurise your boiler or contact an engineer to do this for you
Boiler Model Manuals
The most popular boiler models we supply at Bbright usually have their manuals available online. Here are some that may help you:
While some boiler faults may seem simple to fix at first glance, more often than not a thorough repair will require an expert’s eye. Be sure to properly consult your manual before attempting any boiler fixes yourself, as you could end up with more issues than you started with. At Bbright, we have a team of experienced and highly-qualified engineers who will be able to assist you with whatever boiler error codes you are having trouble with. Find out more about boiler repairs here.
Are you experiencing more boiler error codes than you think you should be? Perhaps it’s time for a long-awaited boiler replacement. Get in touch now for a quote, or browse our boiler selection from leading brands to find the best model for you. You can rest assured you won’t be needing to refer to another manual anytime soon!
