Regular boiler servicing is essential for safety, efficiency, and longevity, but do you know what actually happens during a service? As experienced heating engineers in Melksham, we’ve created this comprehensive checklist to help you understand what a proper boiler service should include. Armed with this knowledge, you can ensure you’re getting the quality service your heating system deserves.
Why Annual Servicing Matters
Before diving into the checklist, let’s quickly highlight why annual servicing is so important. A properly maintained boiler:
- Runs more efficiently, saving you money on energy bills
- Is less likely to break down during cold weather
- Operates safely, reducing risk of carbon monoxide leaks
- Maintains manufacturer warranty validity
- Has a longer operational lifespan
Now, let’s look at what our engineers—and any reputable heating company—should be doing during your annual service.
Visual Inspection (External)
The service begins with a thorough visual inspection of the boiler and its surroundings:
- Checking the boiler’s location meets current regulations
- Ensuring adequate ventilation around the appliance
- Examining flue terminals for proper positioning and condition
- Inspecting pipework for signs of leaks or corrosion
- Checking the condition of the outer casing
These visual checks help identify any immediate safety concerns before proceeding further.
Access and Internal Inspection
Once the external inspection is complete, the engineer will:
- Power down the boiler safely
- Remove the casing to access internal components
- Check for signs of overheating or water damage
- Inspect electrical connections for security and damage
- Check for corrosion on internal components
- Identify any soot deposits that might indicate combustion issues
- Examine the heat exchanger for cracks or blockages
Component Cleaning and Testing
This is where a thorough service differs from a basic check. The engineer should:
- Clean the main burner assembly
- Clean and check the pilot burner (if applicable)
- Clean and inspect the heat exchanger
- Clean or replace air filters
- Clean condensate trap and pipework on condensing boilers
- Test all safety devices including pressure relief valve
- Check and clean the flue ways
- Test flue gas analysis using calibrated equipment
Many boiler problems can be prevented by this proper cleaning of key components.
Operational Testing and Adjustments
After cleaning, the engineer will reassemble the boiler and perform operational tests:
- Check gas pressure and flow rates
- Test flue gas emissions to ensure proper combustion
- Verify correct burner pressure
- Check flame stability and appearance
- Adjust settings if necessary to optimise performance
- Test pump operation and flow rates
- Check expansion vessel pressure
- Verify correct operation of controls and thermostats
System Checks
A good service also includes checking the wider heating system:
- Testing water pressure and topping up if required
- Checking radiators for cold spots (indicating potential sludge)
- Testing system inhibitor levels
- Checking for any unusual noises during operation
- Verifying hot water temperature and flow rate
Final Checks and Documentation
To complete the service, the engineer should:
- Ensure all covers are properly replaced
- Check for gas leaks after reassembly
- Run the boiler through a full heating cycle
- Explain any issues found and recommend remedial actions
- Record all findings and work completed
- Provide you with a service certificate
Red Flags: When the Service Isn’t Up to Standard
Be wary if your service:
- Takes less than 30 minutes
- Doesn’t involve removing the boiler casing
- Doesn’t include a flue gas analysis
- Lacks proper documentation afterwards
As we explained in our article about why boiler servicing should be left to professionals, attempting to service your own boiler is both dangerous and potentially invalidates your warranty.
Keep Your Boiler Running Efficiently
Now that you know what to expect from a proper boiler service, you can ensure your heating system receives the care it needs. At AN Heating, we pride ourselves on thorough servicing that meets all manufacturer specifications and safety standards.
Is your boiler due for a service? Contact our qualified heating engineers in Melksham to schedule a comprehensive service that covers every point on this checklist. Remember, a well-maintained boiler is a safe, efficient, and reliable boiler.
