Replace your boiler when any one of three thresholds is crossed: it’s over 15 years old, the next repair is going to cost more than half a new install, or you’re seeing 2+ of the warning signs below. Most UK boilers reach end-of-life at 12-15 years; some last 20+, but they’re rarely worth keeping past…
A power flush is the process of forcing high-velocity water and a chemical cleaner through your central heating system to remove sludge, rust, and limescale that have built up over the years. It uses a powerful pump connected to your radiators and boiler circuit to dislodge debris that normal filling and draining can’t shift. A…
This is one of the most-confused phrases in UK heating. The honest answer: “combi” and “condensing” are not opposites and are not alternatives. Combi describes how the boiler delivers hot water; condensing describes how it extracts heat from the burned gas. Almost every modern UK boiler — combi or otherwise — is a condensing boiler,…
The honest, no-faff answer: most UK homes with one bathroom and average hot water demand should fit a combi boiler. Larger homes with two or more bathrooms running at the same time, or homes that need stored hot water for high simultaneous demand, are usually better off with a system boiler and an unvented cylinder….
Service your boiler once a year. That’s the UK standard, it’s required by every manufacturer’s warranty, and it’s a legal obligation if you’re a landlord. Skipping it usually saves £100 a year and costs £400-£2,000 the first time something goes wrong without it. This guide explains why annual is the standard, what’s actually included in…
Topping up boiler pressure takes about 5 minutes. You find the filling loop (the silver braided hose under the boiler), open both valves slowly, watch the pressure gauge climb to 1.0 to 1.5 bar cold, then close both valves and reset the boiler if needed. That’s it. This guide walks through it step-by-step for combi…
If your combi or system boiler keeps losing pressure, the cause is almost always one of five things: a leak somewhere in the system, a failing expansion vessel inside the boiler, a stuck pressure relief valve, a recently bled radiator, or a faulty pressure gauge. Most of these you can diagnose yourself in 10 minutes….
British Gas is convenient but expensive. A trusted local Leicester installer is usually 30-40% cheaper for the same boiler, with faster response times and direct contact with the engineer who’s actually doing the work. There are still situations where British Gas is the right call — but for most Leicester homeowners paying out of pocket,…
A new boiler in the UK in 2026 typically costs £1,800 to £4,500 fully installed, depending on the type, size, and complexity of the install. A like-for-like combi swap in a small Leicester house can land near £1,800 on a quiet day. A full system change with new pipework, a smart thermostat, and a power…
Bleed a radiator in 5 minutes with a £2 key. Step-by-step UK guide — what tools, which order, how to top up boiler pressure after, and when to call a heating engineer.
