What’s Included in a Boiler Service July 25, 2025 A regular boiler service is one of the most effective ways to keep your heating system running safely, efficiently, and reliably, especially before the colder months arrive. At TwinSun Heating Ltd, we provide professional boiler servicing throughout Bolton, Warrington, Wigan and surrounding areas. But what does a boiler service involve? Let’s break it down. What Happens During a Boiler Service? Visual Inspection of the System Every boiler service carried out by TwinSun Heating Ltd begins with a full and detailed visual inspection. This first step is crucial in identifying early warning signs of damage or deterioration. Our Gas Safe registered engineer will carefully inspect the external casing, all visible pipework, and any exposed internal components for evidence of wear and tear, water leaks, corrosion or cracks. We also assess the position of your boiler and ensure it’s installed correctly and safely with the required clearances. If any parts are damaged, incorrectly fitted, or not performing as they should, we’ll flag it immediately and provide expert advice on the next steps. This stage is not only about spotting current problems—it also ensures your boiler remains compliant with up-to-date safety regulations and avoids bigger issues down the line. Boiler Safety Checks At TwinSun Heating Ltd, safety is always the number one priority. Boilers that aren’t regularly serviced can pose serious risks, including gas leaks or carbon monoxide exposure. That’s why our boiler service includes a full set of safety checks on all the key components of your system. We test: Flue and ventilation to make sure exhaust gases are safely expelled Gas pressure and flow rate to confirm the boiler is receiving the correct supply Carbon monoxide levels, using specialist equipment to detect any unsafe emissions Ignition and flame sensors, checking they operate correctly and consistently Safety seals, overheat protection and isolation devices to confirm the system will shut down if a fault occurs These checks are carried out using calibrated tools to ensure accuracy. If anything doesn’t meet legal safety standards, we’ll inform you immediately and guide you through the options to correct it. Cleaning Internal Components Over time, boilers accumulate soot, scale and debris, especially on the heat exchanger, burner, and injectors. This build-up can drastically reduce efficiency, raise your energy bills and increase the risk of parts overheating or failing. As part of the service, we carefully disassemble key components to carry out internal cleaning. Our engineers remove accumulated dirt and residue that could impact performance, while ensuring that delicate parts are not damaged in the process. For condensing boilers, we’ll also check and clean the condensate trap to prevent blockages. This proactive cleaning not only helps your boiler run more smoothly, but it also extends its lifespan and reduces the likelihood of future breakdowns. Testing for Efficiency and Performance With everything clean and safe, the next step is to run your boiler through a full operational cycle. This allows our engineer to observe how your system behaves under normal usage conditions. We’ll monitor: How quickly the boiler fires up Whether it responds properly to the thermostat If radiators heat up evenly and maintain temperature That the system pressure remains stable That there are no unusual noises or signs of strain We also test any smart controls or programmable thermostats, ensuring they are properly synced and communicating with the boiler. This performance test confirms that your heating system is not only safe but also delivers maximum comfort and energy efficiency. Reporting and Certification Once your boiler has been fully serviced, we’ll provide a clear and detailed report. This outlines every check carried out, any work completed, and any advisory notes that may help you plan for future maintenance or upgrades. If your boiler passes all the safety and performance checks, TwinSun Heating Ltd will issue a service certificate, your official proof that the appliance is compliant and professionally maintained. This documentation is especially important for: Landlords, who are legally required to carry out annual checks Homeowners, looking to preserve their manufacturer's warranty Buyers and sellers, where a recent service boosts peace of mind Should any remedial work be required, we’ll explain the issue clearly and offer a quote for any follow-up repairs or replacements without any pressure. Ideal for All Boiler Types We work with a wide range of boilers across Bolton, Warrington and Wigan, including combi, system and regular boilers. Whether we installed your system or not, we’re happy to service it. Our Gas Safe registered engineers have years of experience delivering expert boiler repairs, boiler installations, and servicing across the North West. If your boiler needs attention, we’re just a call away. Looking for a Trusted Boiler Service in Bolton, Wigan or Warrington? We provide reliable, thorough boiler servicing across Bolton, Wigan, Warrington and nearby areas. Book your annual service with one of our qualified engineers to keep your home safe, warm, and efficient. Call us today or use our contact form to get started.
