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Guides

Expert guides and advice to help you make informed decisions.

What Type of Boiler Is Right for Me?

05th February, 2026

Guides

What Type of Boiler Is Right for Me?

Our guide explores the different types of boilers available, including combi, system, and regular boilers, and provides practical advice on how to cho...

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Stephen Day

Gas Safe Engineer

What is Boiler Pump Overrun? - Functions, Issues, and Fixes

05th February, 2026

Guides

What is Boiler Pump Overrun? - Funct...

Pump overrun in boilers is a feature that helps cool down the system and manage residual heat. It's essential for maintaining the efficiency and longe...

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Stephen Day

Gas Safe Engineer

What is Boiler Modulation?

05th February, 2026

Guides

What is Boiler Modulation?

A modulating boiler not only adjusts its output to meet the varying heat demands of your home but also works to minimise energy wastage and the wear a...

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Stephen Day

Gas Safe Engineer

What Is An Expansion Vessel?

05th February, 2026

Guides

What Is An Expansion Vessel?

An expansion vessel is an essential component of a modern boiler system, serving a pivotal role in maintaining pressure levels within central heating...

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Stephen Day

Gas Safe Engineer

What is a Boiler PCB?

05th February, 2026

Guides

What is a Boiler PCB?

Our helpful PCB blog provides a comprehensive explanation of the Printed Circuit Board (PCB) in boilers, detailing its function as the control centre...

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Stephen Day

Gas Safe Engineer

Vokera Boiler Red Light

05th February, 2026

Guides

Vokera Boiler Red Light

When a Vokera boiler presents a red light, it often indicates a lockout due to safety mechanisms activating. This may be triggered by a range of fault...

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Stephen Day

Gas Safe Engineer

Vokera Boiler Error Codes - How To Fix

05th February, 2026

Guides

Vokera Boiler Error Codes - How To F...

Familiarising yourself with common Vokera fault codes and their meanings can be crucial in swiftly addressing and resolving boiler issues, ensuring mi...

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Stephen Day

Gas Safe Engineer

Viessmann F4 Fault

05th February, 2026

Guides

Viessmann F4 Fault

Boiler error codes are critical indicators that help identify specific issues within a boiler system. They serve as a first step towards troubleshooti...

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Stephen Day

Gas Safe Engineer

Viessmann F2 Fault

05th February, 2026

Guides

Viessmann F2 Fault

Error codes are integral to the effective operation and maintenance of modern boilers. They serve as a vital diagnostic tool for identifying issues wi...

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Stephen Day

Gas Safe Engineer

Vaillant PCB

05th February, 2026

Guides

Vaillant PCB

A Vaillant boiler Printed Circuit Board (PCB) is a vital part of a modern boiler system. It acts as the central control unit for the boiler, regulatin...

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Stephen Day

Gas Safe Engineer

F83 Vaillant Error Code

05th February, 2026

Guides

F83 Vaillant Error Code

Boiler error codes are essential indicators assisting in the diagnostics of potential issues within a boiler system. They operate as a shorthand, allo...

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Stephen Day

Gas Safe Engineer

Vaillant F62 Fault Code

05th February, 2026

Guides

Vaillant F62 Fault Code

Error codes on boilers can be a confusing and frustrating topic, here at iHeat we want to make everything about boilers as straightforward as possible...

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Stephen Day

Gas Safe Engineer