How Often Should I Service My Boiler?

Quick answer: You should service your boiler once every 12 months. An annual service keeps your boiler safe, efficient, and maintains your manufacturer warranty.

Why Annual Servicing Matters

Your boiler works hard every day — heating your home and providing hot water. Like a car, it needs regular maintenance to stay safe and efficient. Skipping a service might save money short-term, but it significantly increases the risk of a breakdown (usually in the coldest part of winter) and can invalidate your warranty.

£90

Annual Service Cost

Fixed price, no hidden extras

£300+

Average Repair Cost

When a neglected boiler breaks

What's Included in a Boiler Service?

A full boiler service from NK Gas Services includes:

Visual inspection of the boiler and flue
Checking gas pressure and flow rate
Inspecting the heat exchanger for cracks or corrosion
Cleaning the main components — burner, injector, spark probe
Testing all controls and safety devices
Checking for gas leaks
Checking combustion performance
Service record update and certificate issued

Does Servicing Maintain My Warranty?

Yes — most boiler manufacturers (Worcester Bosch, Vaillant, Ideal, Baxi etc.) require an annual service by a Gas Safe registered engineer to keep the warranty valid. If your boiler develops a fault and you haven't had it serviced, the manufacturer can refuse the claim. Always keep your service records.

Best Time to Book

Book your boiler service in summer or early autumn — before the heating season starts. Engineers are less busy, you get faster appointments, and you'll have peace of mind going into winter knowing your boiler is ready.