System Boiler Service
A system boiler service is a routine maintenance visit for boilers connected to a hot water cylinder. It helps keep your heating and hot water running safely and reliably, reduces the risk of breakdowns, and can improve efficiency through correct settings and clean, well-tested components.
More information
What a system boiler service covers
A thorough service checks the boiler, its safety systems, and how it’s operating with your cylinder and heating controls.
- Visual inspection of the boiler, flue, ventilation and key pipework
- Safety checks for gas or oil appliances (as applicable)
- Check of burner and combustion performance where required
- Cleaning of components where needed to support safe operation
- Checks on pressure, expansion vessel and internal seals
- Review of pumps, valves and primary connections to the cylinder
- Test of controls and basic system operation (heating and hot water)
- Clear notes on any faults, wear, or recommended repairs
When this service is most useful
Book a service if your boiler is due its annual maintenance, the system has become noisy, slow to heat, or prone to pressure loss. It’s also sensible before winter, before a tenancy changeover, or if you want reassurance that the boiler is operating safely.
How the service is delivered
The engineer will isolate and access the boiler, carry out safety and performance checks, then inspect and test key components. Where tests indicate cleaning or adjustment is needed, this is completed as part of the service where appropriate. You’ll be told what was checked, what the results mean, and what to do next if any issues are found.
After your service
You receive a clear summary of the boiler’s condition and any recommended next steps, prioritised by safety and reliability. If repairs or parts are advised, you can plan them ahead rather than reacting to a breakdown. Regular servicing also helps you track changes in performance over time and maintain consistent hot water and heating.