Introduction
When was the last time your boiler was serviced? If you can’t remember — or if it’s been more than 12 months — your system might not be running as safely or efficiently as it should.
An annual boiler service is essential for keeping your heating system in peak condition, avoiding breakdowns, and even maintaining your warranty. But many homeowners don’t know what’s actually involved in a professional service — or why it’s worth the cost.
In this blog, we break down exactly what’s included in a boiler service, how often you need one, and why booking a service with Boiler Sure could save you money and stress in the long run.
Why Is Boiler Servicing Important?
Your boiler works hard throughout the year — especially during the winter months — and just like a car, it needs regular maintenance to perform reliably and safely.
Here’s what regular servicing can help you do:
- ✅ Identify and fix minor faults before they turn into breakdowns
- ✅ Improve energy efficiency and lower heating bills
- ✅ Ensure the boiler is safe and operating correctly
- ✅ Extend the lifespan of your system
- ✅ Maintain the validity of manufacturer warranties
- ✅ Meet landlord legal requirements (if you rent out property)
In short, servicing your boiler is a preventive measure that can save you from expensive callouts and help your system run efficiently year after year.
How Often Should I Service My Boiler?
The industry recommendation is once a year. Annual servicing is usually required to:
- Maintain your boiler’s warranty (especially for newer installations)
- Ensure continued safe and efficient operation
- Spot early signs of wear and tear
The best time to book your service is in late summer or early autumn, before the cold weather kicks in — this avoids the winter rush and ensures your boiler is winter-ready.
What’s Included in a Boiler Service from Boiler Sure?
At Boiler Sure, our Gas Safe registered engineers follow a detailed multi-point service checklist to ensure every part of your boiler is tested, cleaned, and inspected for safe operation.
Here’s exactly what’s included:
1. Visual Inspection
We start with a thorough visual check of your boiler and surrounding area, looking for:
- Signs of leaks, corrosion, or water damage
- Flue positioning and condition
- Adequate ventilation (especially in enclosed cupboards)
- General boiler condition and accessibility
This step helps us spot external signs that something may be wrong or at risk.
2. Internal Inspection and Cleaning
The engineer will remove the boiler casing (legally, only Gas Safe engineers can do this) to inspect and clean key components:
- Burner
- Heat exchanger
- Main injector
- Electrodes and seals
- Condensate trap and pipe (on condensing boilers)
Over time, dust, soot and other residue can build up inside the boiler and affect performance. Cleaning improves fuel combustion and heat output.
3. Gas Pressure and Flow Check
We test the gas supply pressure and ensure the flow rate meets the manufacturer’s specifications.
This is especially important if you’ve noticed your boiler taking longer to heat up or not delivering sufficient hot water.
4. Flue Gas Analysis
Using a digital flue gas analyser, we check:
- CO/CO₂ ratios
- Oxygen levels
- Efficiency of combustion
This step ensures your boiler is burning fuel safely and efficiently, with minimal emissions — crucial for both safety and energy performance.
5. Safety Device Tests
We test all safety features to confirm they’re functioning properly, including:
- Flame sensing devices
- Overheat stats
- Gas shut-off valves
- Pressure relief valves
- Ventilation and airflow sensors
Any faults found here are flagged for repair or replacement.
6. Condensate Trap and Pipe Checks
On condensing boilers, we check and clean the condensate trap, ensuring it isn’t blocked or at risk of freezing (especially important in winter).
We’ll also advise you on pipe insulation if necessary.
7. System Pressure and Controls Check
The engineer will:
- Check and adjust boiler pressure
- Test heating controls and room thermostats
- Ensure your system is responding correctly to user input
- Check timers, smart controls, and thermostatic radiator valves (TRVs)
If you have a smart thermostat, we can check compatibility and update its settings as part of your service.
8. Service Report and Recommendations
After the service is complete, we’ll:
- Provide a written or digital service record (ideal for warranty or landlord requirements)
- Explain any identified issues or concerns
- Offer honest advice on system improvements if needed
If your boiler is in poor condition or approaching the end of its lifespan, we’ll help you explore replacement options — but never with pushy sales tactics.
How Long Does a Boiler Service Take?
A standard boiler service usually takes between 45–75 minutes, depending on the boiler’s condition and access. More complex systems (e.g. back boilers or system boilers with cylinders) may take longer.
How Much Does a Boiler Service Cost?
At Boiler Sure, we believe in clear, upfront pricing with no hidden extras. Our standard boiler service includes all labour, checks, and cleaning.
Typical prices start from £75–£90 — with bundle discounts available if you combine your service with a repair, power flush, or annual care plan.
We also offer landlord safety certificates (CP12) as part of our boiler service for rental properties.
Why Choose Boiler Sure for Your Annual Boiler Service?
- ✅ Gas Safe registered engineers
- ✅ Local, trusted service across Scotland
- ✅ Fixed-price servicing with no hidden fees
- ✅ Servicing for all major brands (Worcester Bosch, Vaillant, Ideal, Baxi, and more)
- ✅ Honest advice and aftercare
- ✅ Fast bookings and emergency slots available
We’re here to help keep your home safe, warm, and efficient — no matter the season.
Final Thoughts
Booking your annual boiler service isn’t just a maintenance chore — it’s a smart move that protects your home, your health, and your heating bills.
With Boiler Sure, you get trusted local engineers, a full 360° system inspection, and peace of mind that your boiler is running as it should.
Book your boiler service today or get in touch for more information. We’re here to help — before small problems become big ones.
