About BOYLA

BOYLA is an independent UK resource that helps homeowners and heating engineers quickly understand boiler fault codes and what to do about them. Type the brand and the code on your display, and we'll explain what it means, the common causes, and the safe next steps.

How our content is put together

Our fault-code guides are compiled from manufacturers' published service and user manuals and other reputable heating sources, then written in plain English. We focus on what a code means, the most likely causes, the checks a homeowner can safely make, and the point at which the job needs a professional.

Boilers and gas appliances vary by model and revision, so always check your own appliance's manual and data badge. Our guidance is general information, not a substitute for professional advice or a manufacturer's instructions.

Safety first

Gas work is dangerous and, in the UK, must be carried out by a Gas Safe registered engineer. Our pages clearly separate the simple checks a homeowner can do (such as checking pressure or a frozen condensate pipe) from anything that requires an engineer. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.

How we're funded

BOYLA is free to use. Some links to parts and services are affiliate links, meaning we may earn a small commission at no extra cost to you. This never affects the guidance we give — see our affiliate disclosure for details.

Get in touch

Spotted a mistake, or want us to add a brand or manual? Use our contact form and we'll get back to you.