What Safety Checks Are Included In A Boiler Service

A boiler service is one of the most effective ways to keep your heating system operating safely, efficiently and reliably throughout the year. During this appointment, a qualified heating engineer carries out a series of checks designed to protect your home, prevent breakdowns and ensure your boiler continues to run as it should. Knowing what these checks involve helps homeowners feel reassured about the quality of the boiler service in Epsom, Sutton, Carshalton or Surrey and the ongoing condition of their system.

Key Safety Checks Completed During a Boiler Service

Gas and Combustion Checks

One of the most important stages involves assessing the gas supply, burner and combustion quality. The engineer checks flame appearance, gas pressure and the stability of the burner to ensure the boiler is burning fuel cleanly. They also measure combustion levels using specialist equipment that detects unsafe carbon monoxide output. If any readings fall outside safe limits, these issues must be corrected before the boiler is used again.

Ventilation and Flue Inspection

Good ventilation and a clear flue are essential for safe boiler operation. During the service, the engineer inspects the entire length of the flue, checking for cracks, blockages or loose fittings that could allow fumes back into your home. They also confirm the boiler has enough airflow to support efficient combustion. Poor ventilation can make the boiler work harder, reduce efficiency and increase the risk of carbon monoxide issues, so this step is essential.

Internal Clean and Component Assessment

Once the boiler is open, each internal component is inspected closely. Heat exchangers, fans, seals, electrodes and wiring are checked for wear, corrosion or signs of deterioration. Any dust or residue build-up is cleaned away to prevent overheating and improve performance. This part of the service helps enhance the lifespan of the boiler by ensuring the internal parts stay in good working order.

System Pressure and Safety Device Testing

Your boiler relies on several safety mechanisms to regulate heat and pressure. The engineer checks the system pressure level, expansion vessel and safety valves to make sure they respond correctly. They also test thermostats, temperature controls and cut-off switches to confirm the boiler shuts down if there is an issue. These checks help prevent sudden system faults or unsafe operating conditions.

Carbon Monoxide and Leak Detection

The engineer performs tests to check for small gas leaks and potential carbon monoxide sources. Sensitive detection equipment is used to identify problems that may not yet be noticeable to the homeowner. Early detection allows repairs to be carried out promptly, which keeps the system safe and reduces the risk of long-term damage.

Heating Performance Review

After all inspections and tests are complete, the engineer reinstalls the casing and runs the boiler to check overall performance. They monitor the burner, listen for unusual noises and ensure the boiler heats water and radiators efficiently. This final check confirms the system is safe to use and performing as expected following the service.

When These Safety Checks Become Especially Important

Although annual servicing is always recommended, certain situations make these checks even more critical. Older boilers, noisy systems or boilers that produce inconsistent heat may require more frequent monitoring. Homes that have recently had building work can also experience ventilation or flue disruptions, making a full service essential to ensure everything remains safe.

Boiler Servicing in Epsom, Sutton, Carshalton and Surrey

RCB Plumbing Heating Renewables provides thorough boiler servicing to keep your home safe and your system running smoothly. Our heating engineers carry out all essential safety checks, offer honest advice and make sure your boiler performs reliably through every season. Call us on 02082617499 or fill out our contact form to schedule your boiler service.