A boiler service is more than a quick check that your heating turns on. It involves inspecting the appliance, checking its operation and looking for problems that could affect safety or performance. It’s also usually a condition of a warranty.
The exact process depends on your boiler and its manufacturer’s instructions. But there are several checks you can normally expect during a gas boiler service.
What happens during a boiler service?
A boiler service usually combines a visual inspection with operational and safety checks.
It must be a Gas Safe registered engineer that inspects the boiler and makes sure it is operating correctly. They will also check relevant components and look for signs of wear, damage or deterioration.
Where required, the boiler may be opened so internal components can be inspected. Cleaning or further tests may also be completed according to the manufacturer’s servicing instructions.
The boiler gets a visual inspection
A service will usually begin with an inspection of the boiler and its immediate surroundings.
The engineer looks for obvious signs of problems, such as corrosion, leaks or damage. They can also check that the boiler has been installed in a suitable position and remains in an appropriate condition.
The boiler casing itself also gets inspected.
These initial checks can provide clues about problems that need closer investigation during the rest of the service.
The boiler controls are checked
The engineer checks the boiler’s controls are functioning correctly. Depending on your system, this may include controls on the appliance itself and how it responds to heating demand.
Problems with controls can sometimes look like boiler faults. A heating system that does not come on when expected, for example, may have a control problem rather than a failed boiler.
A flue inspection
Your boiler’s flue carries combustion products safely away from the appliance, so it forms an important part of servicing.
The engineer checks the flue and its termination as appropriate for the installation, and it’s not blocked.
The Inspection of internal components
Depending on the boiler and manufacturer’s instructions, the engineer may remove the casing to inspect internal components.
Here, the engineer follows the servicing requirements for your particular make and model rather than applying exactly the same process to every boiler.
They will look for signs of deterioration, damage or other issues that could affect how the boiler operates.
Cleaning the boiler
Depending on the age of the boiler, servicing can include cleaning components where required by the manufacturer or where inspection shows it is necessary.
Deposits and debris can affect individual components over time. Cleaning appropriate parts helps keep the appliance in the condition intended by its manufacturer.
Gas pressure and combustion
Your engineer will carry out appropriate checks to make sure the boiler is operating correctly.
These can include checking gas pressure or flow where required and testing combustion using suitable equipment. The exact tests depend on the boiler and the manufacturer’s servicing procedure.
Combustion checks provide useful information about how the appliance is burning gas and whether further investigation is required.
Safety devices are checked
Modern boilers contain safety features designed to respond when something is wrong.
A boiler service includes appropriate checks to confirm that relevant safety controls are working correctly. If a safety device or another component is not operating as expected, the engineer can identify the problem and advise on what happens next.
A service therefore provides an opportunity to find issues even when the boiler appears to be working normally day to day.
What does a boiler service include?
A standard boiler service focuses on the boiler rather than your entire central heating system.
A service is also different from a boiler repair. Minor issues may be addressed during the appointment, but faults requiring parts or additional work may need a separate visit. Before the service, make sure the boiler is accessible and mention any intermittent faults or error codes. Previous service records can also be useful. The time needed will depend on the boiler, its condition and any problems found during the checks.
If you need a boiler service, a quick search for boiler servicing near me will return a range of local engineers. Or ask friends and family for a recommendation.
Is a boiler service the same as a gas safety check?
A service focuses on maintaining and checking the appliance according to the manufacturer’s requirements. A gas safety check assesses the safety of relevant gas appliances and flues.
This distinction is particularly important for landlords, who have specific legal responsibilities for annual gas safety checks.
Why have your boiler serviced regularly?
Regular servicing can identify wear and developing faults that may otherwise go unnoticed. Servicing can also help ensure the boiler continues operating as its manufacturer intended. Many boiler manufacturers also require regular servicing as part of their warranty conditions.
