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As a homeowner, you might wonder what happens during a boiler service. Understanding the process can help you appreciate the importance of this annual check-up. Here’s what you can expect when you schedule a boiler service.

Step 1: Visual Inspection

The service begins with a thorough visual inspection of the boiler and its associated pipes and radiators. This helps the engineer identify any visible signs of wear or damage.

Step 2: Operational Checks

The engineer will run the boiler to check basic operational functionality. This includes verifying that the boiler fires up properly and operates at the correct pressure levels.

Step 3: Internal Inspection

The casing of the boiler will be removed to examine internal components such as the heat exchanger, burner, and main injector. The engineer will look for any signs of corrosion or leaks.

Step 4: Cleaning

Part of the service includes cleaning key components that are prone to accumulating dirt and debris, such as the burner, heat exchanger, and condensate trap. This helps in maintaining the efficiency of the boiler.

Step 5: Emissions Testing

To ensure your boiler is not producing harmful emissions, the engineer will conduct a flue gas analysis. This test checks the levels of oxygen, carbon dioxide, and carbon monoxide being emitted.

Step 6: Safety Device Checks

All safety devices are tested during a boiler service to ensure they are functioning properly. This includes checking the boiler thermostat, pressure relief valve, and safety cut-outs.

Step 7: Final Assessments and Recommendations

After the inspection and testing, the engineer will reassemble your boiler and make any necessary adjustments to ensure it’s running efficiently. They will also advise you on any potential issues or parts that need replacing.


A boiler service is a comprehensive check that ensures your heating system is efficient, safe, and reliable. If you live in Coventry, Kenilworth, Leamington Spa, Warwick, Stratford, or Rugby, contact us to schedule your next boiler service. Let our experienced team help you maintain a warm and safe home environment. Book your installation or service today and enjoy peace of mind with a fully functional boiler.