About the Boiler Fault Finder

What is the Boiler Fault Finder?

The Boiler Fault Finder is a free online tool that helps UK homeowners and Gas Safe engineers quickly understand boiler fault codes. When your boiler displays an error code, it can be confusing and stressful - especially when your heating or hot water stops working.

We've built a comprehensive database of fault codes covering over 18 major boiler brands and 570+ individual fault codes. Each code page gives you a plain-English explanation of what the fault means, a severity rating, guidance on whether it's safe to attempt a fix yourself, and a step-by-step repair guide.

Who Are We?

The Boiler Fault Finder is operated by Boiler & Spares Ltd, a UK company specialising in boiler repairs, servicing, and genuine spare parts. With years of experience in the heating industry, we understand the frustration of a broken boiler - and we've built this tool to help you get answers fast.

Our fault code data is compiled from official manufacturer documentation, Gas Safe engineer guidance, and technical field experience. We update the database regularly to ensure accuracy and coverage.

Our Commitment to Safety

Gas safety is paramount. Every fault code page clearly distinguishes between checks that are safe for homeowners to perform and work that legally requires a Gas Safe registered engineer. We never encourage unsafe DIY gas work.

If in doubt, always call a Gas Safe registered engineer. You can verify an engineer's registration at the Gas Safe Register website, or find a vetted local professional through our partner directory.

Coverage

We cover all major UK boiler manufacturers including Vaillant, Worcester Bosch, Baxi, Ideal, Alpha, Glow-worm, Potterton, Ferroli, Ariston, Viessmann, Vokera, Intergas, Keston, Navien, Biasi, Ravenheat, Main Heating, and Saunier Duval. New brands are added regularly.