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Stephen Day

Gas Safe Engineer at iHeat

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling, and renewable energy industry, specialising in boiler installations, air conditioning, and heat pump systems.

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About Stephen Day

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling and renewable energy industry.

Throughout his career, Stephen has designed, installed and maintained thousands of systems across homes and businesses in the UK. His background on the tools, combined with his directorship role at iHeat, gives him a rare understanding of both the technical and operational sides of the industry.

He has helped to secure Which? Trusted Trader accreditation all with a focus on delivering great service and long-term value for customers. He also writes for the iHeat blog, sharing practical advice and explaining heating topics in plain, helpful language.

Stephen continues to stay up to date with the latest heating technologies, building regulations and low-carbon innovations.

Gas Safe ID: 5910722

Expertise

  • Boiler systems and installation
  • Heat pumps and hybrid heating systems
  • Gas safety and compliance
  • System design
  • Renewable and low-carbon technologies
  • Technical training


Articles by Stephen Day are reviewed by iHeat’s technical team for accuracy and reliability.

Stephen Day's latest articles

Why Won't My Boiler Turn On?

30th May, 2025 Guides

Why Won't My Boiler Turn On?

Boilers are complex systems, and pinpointing the exact reason for failure can sometimes be...

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What is Boiler Modulation?

30th May, 2025 Guides

What is Boiler Modulation?

A modulating boiler not only adjusts its output to meet the varying heat demands of your h...

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iHeat Awarded Iconic Which? Trusted Trader Accreditation

30th May, 2025 News

iHeat Awarded Iconic Which? Tr...

Receiving the Which? Trusted Trader Accreditation is just the beginning. At iHeat, we unde...

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Electric Space Heaters - Bad Idea?

30th May, 2025 Guides

Electric Space Heaters - Bad I...

Gas heating systems are often more economical for households as natural gas is generally c...

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Ideal F7 Error Code - How To Fix

30th May, 2025 Guides

Ideal F7 Error Code - How To F...

Understanding the Ideal F7 error code is vital for diagnosing the issue and applying the a...

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F27 Glow Worm Fault

30th May, 2025 Guides

F27 Glow Worm Fault

The F27 error code can result from several underlying issues, ranging from low gas pressur...

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Vaillant F61 Error Code - How To Fix

30th May, 2025 Guides

Vaillant F61 Error Code - How...

One of the most common Vaillant boiler error codes is the F61 error code. This error code...

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Boiler Short Cycling - Fixes

30th May, 2025 Guides

Boiler Short Cycling - Fixes

Our Boiler Short Cycling Fixes blog offers expert solutions and practical advice to addres...

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What is a Boiler PCB?

30th May, 2025 Guides

What is a Boiler PCB?

Our helpful PCB blog provides a comprehensive explanation of the Printed Circuit Board (PC...

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Unusual Boiler Smells: Causes and Fixes

30th May, 2025 Guides

Unusual Boiler Smells: Causes...

Unusual boiler smells can be a sign of a serious problem, such as a gas leak or bacterial...

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What is a Smart Home and Smart Boiler?

30th May, 2025 Guides

What is a Smart Home and Smart...

Smart boilers are an innovative technology that can help homeowners save money on their en...

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Boiler and Shower Issue Fixes

30th May, 2025 Guides

Boiler and Shower Issue Fixes

If you're experiencing issues with your boiler and shower, such as no hot water or low wat...

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