If you’ve never had your boiler serviced before, it’s natural to wonder what’s involved. The good news is that a standard boiler service is straightforward, usually takes less than an hour, and causes minimal disruption to your day. Here’s a step-by-step look at what your Gas Safe or OFTEC registered engineer will check.
The Boiler Service Checklist
Visual Inspection
The first thing your engineer will do is carry out a visual check of the boiler and its surrounding area. They’ll look for any obvious signs of leaks, corrosion, or damage, and confirm that the boiler is correctly installed and properly ventilated. This initial assessment helps identify anything that needs closer attention before the casing is opened.
Checking Internal Components
Once the casing is removed, the engineer will inspect the key internal parts of the boiler. This includes the heat exchanger, burner, seals, and gaskets – checking for wear, damage, or deterioration that could affect performance or safety.
Cleaning Key Parts
Over time, dirt and debris can build up inside your boiler, reducing its efficiency and putting unnecessary strain on the system. The engineer will clean essential components such as the burner and heat exchanger to help your boiler run as smoothly and efficiently as possible – which can also help keep your energy bills down.
Flue Gas Analysis
One of the most important checks in any boiler service is the flue gas analysis. Using a specialist tool, the engineer will measure the gases produced during combustion to confirm your boiler is burning fuel safely and efficiently. This is also a critical check for carbon monoxide, an odourless and potentially fatal gas that a faulty boiler can produce.
Flue and Ventilation Checks
The flue – the pipe responsible for carrying waste gases safely out of your home – will be inspected to make sure it is secure, undamaged, and free from obstruction. Proper ventilation is also checked to ensure your boiler can operate safely without harmful gases entering your living space.
Testing Controls and Safety Devices
Your engineer will test the thermostat, pressure levels, ignition system, and all safety mechanisms to confirm they are functioning correctly. Any controls that are faulty or not responding as expected will be flagged and discussed with you.
Checking the Gas Supply
Gas pressure and flow are tested to ensure your boiler is receiving the correct supply. Incorrect pressure can affect both performance and safety, so this check is essential for making sure everything is operating within the manufacturer’s recommended parameters.
Final Checks and Service Record
Once all checks and cleaning are complete, the boiler is reassembled and run to confirm everything is working correctly. You’ll receive a service record — important for maintaining your warranty and providing proof of annual maintenance. If any issues were found during the visit, your engineer will explain their findings and recommend the appropriate next steps.
How Long Does a Boiler Service Take?
Most boiler services take between 30 and 60 minutes, depending on the age and condition of the boiler. If additional work is needed, your engineer will let you know before carrying out any repairs.
How Often Should You Book a Service?
Once a year. Annual servicing is recommended by manufacturers, required by most warranty agreements, and the single most effective way to keep your boiler safe, efficient, and reliable throughout the year.
Ready to Book Your Boiler Service?
At L&P Heating Services Ltd, our fully qualified Gas Safe and OFTEC registered engineers provide thorough, professional boiler servicing across Bristol. Get in touch today to arrange your appointment and keep your home warm, safe, and running efficiently all year round.