Boiler & Heating Guides

Free expert advice from our Gas Safe registered engineers. Everything you need to know about boilers, heating, and plumbing.

TL;DR

Our guides cover the most common questions homeowners have about boilers and heating: when to service vs repair, how to troubleshoot problems yourself, whether underfloor heating is worth it, and how to choose a reliable plumber in Milton Keynes. Written by Gas Safe registered engineers with 10+ years experience.

Last updated: May 2026

Written by the Plumbline MK Team · Gas Safe Reg #957816 · Last updated May 2026

Boiler Service vs Repair: What’s the Difference?

Not sure if you need a service or a repair? We explain what each involves, the costs, and how to know which one you need.

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Common Boiler Problems and What They Mean

Boiler cutting out, losing pressure, or making strange noises? Our troubleshooting guide explains what’s wrong and when to call an engineer.

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Is Underfloor Heating Worth the Investment?

An honest breakdown of underfloor heating costs, types, pros and cons, and whether it’s worth it for UK homeowners in 2026.

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How to Choose a Plumber in Milton Keynes

A straightforward checklist of what to look for when hiring a plumber or heating engineer, plus red flags to avoid.

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Frequently Asked Questions

Quick answers to the most common questions our engineers hear.

How often should I service my boiler?

Service your boiler once a year, ideally before winter. Annual servicing keeps it running efficiently, maintains your manufacturer warranty, and is a legal requirement for landlords.

What are the signs my boiler needs repair?

Common warning signs are: error codes on the display, repeated pressure loss, banging or kettling noises, cold radiators, a yellow or orange flame instead of blue, and rising energy bills with no change in usage.

How do I know if I should repair or replace my boiler?

Replace if your boiler is over 15 years old, breaks down repeatedly, or repair quotes approach 50% of the cost of a new boiler. Otherwise repair is usually the right call.

How long does a boiler installation take?

Most like-for-like combi boiler swaps complete in a single day. Conversions (e.g. system to combi) or installations that involve relocating the boiler typically take 2-3 days.