Boiler Guides

Replacing your boiler doesn’t have to mean a huge upfront cost. At Clever Energy Boilers, based in Bingley, West Yorkshire, we offer flexible boiler finance options for homeowners across North…

Not every home needs a 40kW powerhouse. If you’re in a 2–3 bedroom terrace, a smaller semi, or a modern flat, a smaller boiler is often the smarter choice —…

The best boilers for a 2 bedroom house in 2026 are the Worcester Bosch Greenstar 4000, Vaillant ecoTEC Plus, Viessmann Vitodens 100-W, Ideal Logic+ Combi, Baxi 800 Combi, Alpha E-Tec,…

The best boilers for a 3 bedroom house are: Viessmann Vitodens 050-W 30kW (best overall value) Worcester Bosch Greenstar 4000 30kW (best mid-range with Which? Best Buy status) Viessmann Vitodens…

Based on efficiency, reliability, output, and value for money, the best boilers for a 4 bedroom house are the Worcester Bosch Greenstar 8000 Life, Viessmann Vitodens 100-W, Vaillant ecoTEC Plus,…

If your boiler pump is not working, the most common causes include a seized pump shaft, an airlock in the system, a faulty capacitor, incorrect pump speed settings, or a…

In most cases, a stuck diverter valve is caused by a build-up of limescale or sludge inside the valve, general wear and tear over time, a lack of regular boiler…

A boiler airlock happens when a pocket of air gets trapped inside your central heating system or hot water pipes, stopping water from flowing properly. The most common causes include…

Boiler short cycling happens when your boiler keeps switching on and off repeatedly in short bursts, rather than completing a full heating cycle. The most common causes include low boiler…

The most common Viessmann boiler problems include no hot water or heating, error fault codes appearing on the display, low boiler pressure, strange noises, pilot light issues, boiler lockout, a…

A faulty diverter valve on a boiler is most commonly caused by wear and tear over time, limescale buildup, debris or sludge in the system, a stuck or seized valve,…

Boiler problems never happen at a convenient time. Losing heating in winter or hot water at any time of year disrupts daily life quickly — and knowing what you’re dealing…