Annual Boiler Service in South East London & North West Kent
Book an annual boiler service with GX7's Gas Safe registered engineers. We service Worcester Bosch, Vaillant, Ideal, Baxi, Glow-worm, Main and Potterton combi, system and regular boilers across South East London and North West Kent. A yearly service helps keep your boiler safe, reliable and efficient, and manufacturer guarantees usually require one.
Open Mon–Fri 8am–7pm · Sat & Sun 9am–12pm · Gas Safe No. 935610 · Our own Gas Safe engineers
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Boiler operating checks
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Controls checked where appropriate
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Visual inspection of the boiler and installation
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Flue and combustion-related checks where applicable
Safety devices checked as appropriate
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Inspection for visible leaks, damage or deterioration
Relevant components inspected according to appliance/service requirements
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Inspection for visible leaks, damage or deterioration
What's Included in Your Annual Boiler Service
Visual inspection of the boiler, pipework and flue
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Flue gas analysis with a calibrated combustion analyser
Gas pressure and burner checks
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Condensate trap and pipe checked and cleaned where needed
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Checks follow the manufacturer's service instructions for your boiler model, whether it's a combi, system or regular boiler. Any repairs or parts are explained and agreed with you before any work starts.
Safety devices and seals checked
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System pressure and expansion vessel checked
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Heating controls and thermostat checked
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Findings explained and service certificate issued (Benchmark record where applicable)
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Why an Annual Boiler Service Matters
Gas Safe Register recommends having gas appliances safety checked and serviced every year. An annual boiler service helps catch problems early, keeps your boiler running efficiently and is usually required to keep your manufacturer guarantee valid.
Safety Checks
A poorly maintained boiler can produce carbon monoxide, which you can't see or smell. We check combustion, the flue and safety devices so you know your boiler is working safely.
Fewer Breakdowns
Worn seals, blocked condensate traps and failing parts are often spotted during a service, so they can be fixed before your boiler lets you down in winter.
Efficient Running
Flue gas analysis and burner checks confirm your boiler is burning gas correctly, helping it run efficiently and reliably.
Keep Your Guarantee Valid
Most manufacturer guarantees, including Worcester Bosch and Vaillant, require an annual service by a Gas Safe registered engineer. You get a service certificate as proof.
Boiler Service Prices & Options
Combi Boiler Service
Annual combi boiler service from £70. Includes the full checklist above, flue gas analysis and a service certificate.
Strip-Down Service
From £125 plus parts. A deeper service where key components are removed and cleaned. Often recommended if your boiler hasn't been serviced for a while or isn't performing well.
System & Regular Boilers
For boilers that work with a hot water cylinder. The price depends on your boiler and system and is confirmed when you book, before we visit.
Unvented Cylinder Service
Megaflo and other unvented cylinders should be serviced regularly by a G3-qualified engineer. Our G3 engineer services them as a separate visit, priced when you book.
Service Reminders
If GX7 installed your boiler, we keep a record and call you when your next annual service is due, so your guarantee stays protected.
Landlords
Letting a property? Landlord gas safety certificates (CP12) are covered on our Landlord Gas Safety page.
Boiler already showing a fault? Our boiler repairs page covers common faults, fault codes and what to check first.
How Your Boiler Service Works
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Book Your Service
Annual Boiler Service
Certificate & Advice
Call, WhatsApp or send the form with your boiler make and model. We confirm your price and appointment before we visit.
A Gas Safe registered engineer services your boiler to the manufacturer's instructions, including flue gas analysis and safety checks.
You receive a service certificate (Benchmark record where applicable) and plain-English advice on anything we find. Any repairs are agreed with you first.
Why Choose GX7 for Your Boiler Service?
Gas Safe Registered Engineers
Every boiler service is carried out by our own Gas Safe registered engineers (Gas Safe No. 935610), never subcontractors.
Clear, Honest Advice
We explain what we found in plain English. Any repair or part is priced and agreed with you before any work starts.
Brand Installers
Worcester Bosch Installer · Vaillant Advance Installer. We service all major brands, and our G3-qualified engineer services unvented cylinders.
Local Coverage Areas
Based in Grove Park, SE12, servicing boilers across Bromley, Chislehurst, Petts Wood, Orpington, Eltham and surrounding areas of South East London and North West Kent.
Boiler Brands We Service
We carry out Worcester Bosch boiler servicing, Vaillant boiler servicing, Ideal boiler servicing and Baxi boiler servicing, as well as Glow-worm, Main and Potterton boilers. Combi, system and regular boilers are all covered. Tell us your boiler make and model when you book.
What Our Customers Say
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“Great service by GX7. Carried out a boiler service and gas safety check on my tenanted property. Professional, prompt and experienced.
Really quick turnaround, super friendly and transparent about the works required. Would use again!
Very good service all round. Harmeen and his team are very polite, tidy, respectful and excellent at fixing central heating systems. I will definitely use them again.
Richard
MyBuilder
Martin Jacobs
Trustpilot
Luke
MyBuilder
Boiler Servicing FAQs
✓ Gas Safe Registered (935610)
Ready to Book Your Boiler Service?
Book your annual boiler service with GX7's Gas Safe engineers. We cover South East London and North West Kent, including Grove Park, Lee, Eltham, Blackheath, Bromley, Chislehurst, Elmstead, Bickley, Petts Wood, Orpington, Chelsfield, Keston, Hayes, Beckenham, Sidcup, Sevenoaks, Otford and Westerham.
✓ Charges Agreed Before Work
✓ Mon–Fri 8am–7pm · Weekends 9am–12pm
Book Your Boiler Service
Tell us your boiler make, type and age, and we'll confirm your price and a convenient appointment before we visit.