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Boiler FAQs

Answers to the most common questions about boilers, heating, and installations — from our Gas Safe registered engineers.

Installation

Boiler Installation FAQs

Everything you need to know about getting a new boiler installed — from booking to completion.

6 questions answered

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Boiler Types

Combi Boiler FAQs

Common questions about combi boilers — how they work, who they suit, and what to expect.

5 questions answered

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Troubleshooting

Boiler Pressure FAQs

Why is my boiler pressure too low or too high? How to repressurise your boiler safely.

5 questions answered

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Troubleshooting

Boiler Error Codes FAQs

What do boiler fault codes mean? Common error codes for Worcester Bosch, Vaillant, Baxi, and Ideal.

5 questions answered

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Finance

Boiler Finance FAQs

How does boiler finance work? Eligibility, 0% options, and what to expect when applying.

5 questions answered

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Servicing

Boiler Service FAQs

What does a boiler service involve? How often to service and why it matters.

5 questions answered

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Safety

Gas Safety FAQs

Carbon monoxide safety, Gas Safe registration, and keeping your family safe.

5 questions answered

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Heat Pumps

Heat Pump FAQs

Air source and ground source heat pump FAQs — how they work, costs, and whether they're right for you.

5 questions answered

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Warranty

Warranty and Guarantee FAQs

Boiler warranty questions — what's covered, how long it lasts, and what voids the warranty.

5 questions answered

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Grants

Boiler Grants and Schemes FAQs

Government grants, ECO4, and schemes that can help reduce the cost of a new boiler or heat pump.

5 questions answered

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Buying Advice

Choosing the Right Boiler FAQs

Not sure which boiler to choose? Answers to the most common questions about selecting the right boiler.

5 questions answered

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Landlords

Landlord and Rental Property FAQs

Landlord legal obligations for boilers, Gas Safety Record requirements, and tenant heating rights.

5 questions answered

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Replacement

Boiler Replacement Timing FAQs

When should you replace your boiler? Signs it's time for a new one and how to decide.

5 questions answered

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Local

Corby and Local Area FAQs

Questions specific to boiler installations in Corby, Northamptonshire, and surrounding areas.

5 questions answered

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Maintenance

Boiler Maintenance and Care FAQs

How to look after your boiler, extend its life, and avoid common problems.

5 questions answered

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New Builds

New Build Boiler FAQs

Boiler questions for new build homes — what's typically included and what you might need to add.

5 questions answered

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Renewable Energy

Biomass and Renewable Heating FAQs

Biomass boilers, solar thermal, and renewable heating FAQs for UK homes.

5 questions answered

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Troubleshooting

Boiler Noise FAQs

What do different boiler noises mean? Banging, gurgling, whistling, and kettling explained.

5 questions answered

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Troubleshooting

Boiler Not Working FAQs

Common reasons why your boiler isn't working and simple fixes to try before calling an engineer.

5 questions answered

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Home Moves

Moving Home Boiler FAQs

Questions about boilers when buying, selling, or renting a property.

5 questions answered

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Most Asked Questions

How long does a boiler installation take?
A standard combi-for-combi boiler replacement takes 4–6 hours. More complex jobs (system upgrades, boiler relocation) can take 1–2 days.
Do I need to be home during the installation?
Yes, an adult should be present throughout. You'll need to show the engineer where the stopcock and gas meter are located.
What is a combi boiler?
A combi (combination) boiler provides both central heating and instant hot water from a single unit, without needing a separate hot water cylinder or cold water tank.
Is a combi boiler right for my home?
Combi boilers are ideal for properties with 1–3 bedrooms and up to 2 bathrooms. Larger homes may benefit from a system boiler with a cylinder for better hot water flow rates.
What pressure should my boiler be at?
Most boilers should sit at 1–1.5 bar when cold. When the heating is running it may rise to 1.5–2 bar — this is normal.
Why has my boiler pressure dropped?
Boiler pressure can drop due to a small water leak in the system, a faulty pressure relief valve, or from bleeding radiators. If it keeps dropping, call a Gas Safe engineer.

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