All 32 London boroughs

Smell gas? Leave the property, avoid switches and flames, and call the National Gas Emergency line free on 0800 111 999 first. Once you're safe, call us on 020 3000 0000 for the repair.

Boiler Guides, Written by Engineers Who Fix Them

Plain-English answers to the questions London asks us every day: what that error code means, what a repair should cost, and when to stop repairing altogether. No jargon, no scare tactics, and every guide ends with what to do next.

Vaillant F22 Fault: What It Means and How to Fix It

F22 on a Vaillant ecoTEC means the boiler has detected too little water in the

Read guide >

July 2, 2026