Boiler fault and error codes

If your boiler develops a problem or error, it often displays an error code to help you diagnose it on the front panel. These can be confusing as they appear as a variety of different numbers and letters, specific to the boiler itself and the issue.

Here at Swale Heating, we want to make sure that our customers have as much information and assistance as possible, so below we have developed a list of all the error codes which could appear on a Worcester Bosch, Vaillant or Ideal boiler, which we install. Faults and errors are a rare occurrence with today’s modern and reliable boilers.

If your boiler is showing a fault, contact us to arrange a repair with a Gas Safe registered engineer. We offer an emergency repair service, which is available 24/7; one of our engineers will never be far away. We know that a boiler breakdown can be frustrating, so at Swale Heating we are here to help, no matter how small the issue.

At Swale Heating, we install only the best boilers from some of the UK’s most highly regarded heating manufacturers. One of the most popular brands of boiler we install across Kent and Sussex are Worcester’s comprehensive boiler range. Worcester are market leaders and produce an extensive range of combi boilers, regular boilers and system boilers that run on a variety of fuel sources, including natural gas, LPG and oil.


Vaillant are one of the UK's most popular boiler brands, thanks to their extensive range of A-rated boilers and fantastic aftercare service. They have manufactured some of the biggest selling boilers around.

So much so that there is bound to be a Vaillant boiler model for heating systems of all shapes and sizes.



Ideal have been producing boilers for over 100 years and offer an incredibly wide range of radiators including the Logic and Logic + combi boilers. After winning a Queen's Award for Enterprise in Innovation in 2013, and Good Housekeeping Reader Recommended Status, you can be sure that Ideal are a well known and reliable brand.