Boiler Servicing London
Boiler Servicing London Help Centre
What a boiler service includes, when to book, and how to reduce breakdown risk.
We provide boiler servicing across London with Gas Safe registered engineers.
Clear, practical servicing with safety checks and performance advice.
24/7 availability with London wide call handling and booking.
Boiler Servicing London (Gas Safe)
Need an annual boiler service? Tell us your postcode, boiler brand and model and we will advise the right booking slot.
📞 Call 0203 695 3137
Request Call Back
Fast triage: postcode, boiler brand and model, boiler age (approx), and whether you have any current fault codes.
⚠️ Safety First
Smell gas? Leave the property and call the National Gas Emergency Line: 0800 111 999.
Carbon monoxide alarm sounding? Get everyone out immediately and call 999. Learn more about carbon monoxide safety.
Boiler in lockout? Note the fault code and avoid repeated resets. We can advise whether you need repair first.
Jump to: What’s Included · When to Book · Common Issues Found · FAQs
What a Boiler Service Includes
- Safety checks: flue, combustion safety and basic gas safety checks
- Visual inspection: leaks, corrosion, seals, obvious wear
- Performance checks: heating and hot water operation
- Pressure and system checks: guidance on correct pressure and topping up if needed
- Controls check: thermostat and timer basics, where relevant
- Advice: practical steps to reduce breakdown risk and improve efficiency
When to Book a Boiler Service
- Once a year for most boilers
- Late summer or early autumn before peak winter demand
- Before landlord checks if you want issues resolved ahead of CP12
- After repeated pressure drops or lockouts to spot system problems early
Common Problems Found During Servicing
- Low pressure and small leaks: often after radiator bleeding or from ageing valves
- Sludge and restricted circulation: cold radiators or overheating symptoms
- Frozen condensate risk: external condensate runs that need insulation or rerouting
- Controls issues: thermostats, programmers, and wiring faults
- Early warning signs: noisy pumps, kettling, inconsistent hot water
If your boiler pressure keeps dropping, see our pressure guide. If radiators are cold at the bottom or you have noisy pipework, a power flush can restore flow.
🔧 Servicing Helps Prevent Winter Breakdowns
A yearly service can catch pressure issues, circulation problems and early wear before they become a no heating emergency. If your boiler is older and you are weighing up repair vs replace, use our repair or replace guide.
Boiler Servicing FAQs
How often should I service my boiler?
Most boilers should be serviced once a year.
Will servicing fix a fault?
Servicing is preventive. If we find a fault that needs repair, we will explain the next steps.
Is a service the same as a CP12?
No. A CP12 is a landlord gas safety certificate. If you are a landlord, book CP12 here: Gas Safety Certificate (CP12).
Related Services
Power Flush
New Boiler Installation
Gas Safety Certificate (CP12)
London Coverage
Contact Us
Book a Boiler Service
Speak to our team and we will arrange a suitable time for an annual service.
Join 1,000’s of happy customers in London!
Trusted, reliable boilers repair & install specialists.
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