Annual boiler servicing: safety, efficiency, and warranty

An annual boiler service by a Gas Safe registered engineer helps keep your system operating safely and efficiently while supporting manufacturer warranty requirements in most cases.​
Manufacturers recommend a first service 12 months after installation and annually thereafter, which typically includes internal inspection, cleaning key components, flue checks, and performance verification.​

• Why it matters: Annual servicing helps prevent costly breakdowns, maintains efficiency to lower bills, and often keeps warranty terms valid.​

• Who can service: Only Gas Safe registered engineers are legally allowed to carry out gas boiler servicing and issue the appropriate documentation.​

• Landlord duty: Landlords must obtain a yearly gas safety check on gas appliances, and a service may still be required to maintain manufacturer warranty even if a safety check is completed.​

• Best practice: Industry guidance highlights agreed best practice around thorough inspection, combustion analysis, and documented checks at service time.​

Booking a pre‑winter service reduces seasonal failure risk and ensures safe operation under higher winter demand.​