Boiler advice
Faults, fault codes, leaks, servicing and choosing a new boiler, explained in plain terms. If you would rather have it looked at, the service pages have prices and booking.
Faults and fault codes
Boiler Losing Pressure: Causes, Safe Checks and When to Call
Why a boiler loses pressure, the checks you can safely do yourself, how to top up the pressure, and the signs that mean it is time to call a Gas Safe engineer.
6 min read, ReadNo Hot Water but Heating Works: Safe Checks and Repairs
No hot water but heating works? Check common combi boiler and cylinder faults, learn what is safe to check, and when to call a heating engineer in London.
12 min read, ReadVaillant Boiler Fault Codes: What Your ecoTEC Is Saying
Vaillant boiler fault codes explained for London homes. What F.22, F.28 and F.75 mean, what you can safely check, and when to call a Gas Safe engineer.
15 min read, ReadBoiler Leaking Water: What to Do and Who to Call in London
Boiler leaking water? Here's what to do in the first few minutes, the common causes, what affects repair costs and when to call a Gas Safe engineer in London.
14 min read, Read
Servicing and looking after your boiler
What Does a Boiler Service Include: 2026 UK Guide
What does a boiler service include? See the 2026 UK checklist, safety tests, typical time and costs, plus how to choose a Gas Safe engineer in London.
13 min read, ReadHard Water in South West London: Protect Your Boiler
Hard water in South West London clogs boilers with limescale. Spot the warning signs, see the real costs, and learn the fixes a Gas Safe engineer can fit in 2026.
14 min read, Read
Choosing a new boiler
Should I Repair or Replace My Boiler? A Practical Guide
How to decide whether to repair or replace a boiler: its age, the cost of the repair, parts, warranty, efficiency and safety, with a simple rule of thumb and the questions to ask an engineer.
4 min read, ReadCombi vs System vs Conventional Boiler: Which Suits Your Home?
How combi, system and conventional boilers work, which homes each one suits, what space and water pressure they need, and what to consider before changing type.
4 min read, ReadBest Boiler Brands UK 2026: Honest Picks for London Homes
Best boiler brands UK 2026: a London Gas Safe engineer compares Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann on reliability, warranty and value.
14 min read, ReadViessmann Vitodens Range Guide for London Homes
Use this Viessmann Vitodens range guide to compare 050-W and 100-W combi and system models, hot-water demand, sizing and installation checks for London homes.
15 min read, ReadGas vs electric boiler UK: Which suits your London home?
Gas vs electric boiler UK: compare 2026 running costs, installation, hot water and electrical checks so you can choose the right heating for your London home.
7 min read, Read