What Does a Gas Boiler Service Include?
Getting your boiler serviced every year is one of those things that’s easy to put off — until something goes wrong. Here’s exactly what happens during a service, so you know what you’re paying for and why it matters.
What’s Included with a Boiler Service
Every gas boiler service includes the following carried out by a Gas Safe registered engineer. Here’s what they work through:
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Checking controls and settings are operating correctly
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Inspecting internal components for wear, leaks, or damage
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Testing gas pressure and flow rates
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Verifying all safety devices are functioning
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Looking for signs of corrosion or water damage
Never attempt to service a boiler yourself — gas work must always be carried out by a qualified professional and the cost of a gas boiler service is not that much, especially when you pay montly with a boiler service plan.
Visual Inspection and Efficiency Check
Your engineer starts with a thorough visual check — examining the boiler’s exterior, surrounding pipework, and any obvious signs of wear or leaking. From there, they run an efficiency test to confirm your boiler is burning gas cleanly and not wasting energy. It is important this is included with a boiler service, as a boiler running inefficiently costs you money every single month without you realising.
Carbon Monoxide and Flue Analysis
This is arguably the most important part of what is included in the whole service. Using specialist equipment, your engineer analyses flue emissions and checks combustion levels to rule out dangerous carbon monoxide production.
They’ll assess:
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Flue condition and positioning
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Gas combustion quality
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Any signs of incomplete burning
If you don’t already have a CO detector fitted, we’d strongly recommend one — it’s a small cost for significant peace of mind.
Cleaning and Component Checks
Limescale, soot, and general debris build up over time and quietly drag your boiler’s performance down. During this stage, your engineer will:
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Clean the burner and heat exchanger
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Clear any debris from the pilot assembly
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Inspect and clean the condensate trap
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Check seals, fans, and ignition components
If anything looks worn, they’ll flag it before it turns into a breakdown — which is exactly the kind of early warning that saves you money.
Getting Your Service Certificate
Once the service is complete, you’ll receive a certificate confirming your boiler has been inspected and is safe to use. For landlords, this is essential documentation for legal gas safety compliance. For homeowners, it protects your warranty and provides useful records if you ever sell your property.
How Long Does this all Take?
Most boiler services take between 30 and 60 minutes. To make the most of your appointment:
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Clear easy access to your boiler beforehand
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Make sure your heating and hot water are running so the engineer can test them properly
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Have any previous service records to hand if you’d like them updated
A gas boiler service helps:
- Detect potential faults before they cause breakdowns
- Ensure your boiler burns fuel efficiently, saving on energy bills
- Reduce the risk of dangerous carbon monoxide leaks
- Keep your manufacturer’s warranty valid
At PlusHeat, we recommend annual servicing to stay compliant with most warranty terms and for peace of mind that your boiler is safe. Regular boiler maintenance frequency recommendations vary depending on usage and specific models, but it’s generally wise to consult your manufacturer’s guidelines.
Adhering to these suggestions not only enhances efficiency but also extends the lifespan of your system. Keeping a consistent maintenance schedule can prevent unexpected breakdowns and costly repairs.
Conclusion
A gas boiler service isn’t just a tick-box exercise—it’s your first line of defence against breakdowns, high bills, and safety risks.
At PlusHeat, our Gas Safe engineers follow a full gas boiler service checklist to keep your heating system running efficiently all year round.
Book a professional boiler check today and enjoy peace of mind that your home is safe, warm, and efficient. Regular boiler maintenance tips for homeowners can greatly extend the life of your heating system. Simple tasks, such as checking the pressure and bleeding radiators, can help ensure optimal performance. It’s also wise to schedule annual professional inspections to catch any potential issues before they become major problems.
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