Geminox Boiler Repairs
& Servicing London
Expert Geminox engineers. Same-day emergency repairs, full installations & annual servicing. Gas Safe registered, available 24/7, 365 days a year.
Book This Service
Available 24/7. Gas Safe registered engineers.
2–4 hr Response
Emergency call-out across London
Gas Safe Registered
Every engineer fully certified
Geminox Specialists
Parts stocked on every van
Transparent Pricing
Fixed quotes before work starts
Geminox boiler repairs London — at a glance
Geminox boiler repairs in London cost £150/hr + VAT with no separate call-out fee, and our Gas Safe engineers typically reach you within 2–4 hours. We stock common Geminox parts on every van — including sensors, fans and gas valves — so most repairs are completed on the first visit. A Geminox combi installation in London costs £3,200–£4,200 including supply, fit and commissioning.
Quick Facts
- Suitable models
- THR, THi, Thision range
- Typical repair time
- 1–2 hours
- Standard rate
- £150/hr + VAT
- Emergency response
- 2–4 hours
- Parts availability
- Common parts on every van
- Warranty
- 12 months on all repairs
London's trusted Geminox boiler engineers
Geminox is a highly regarded European heating brand, known for advanced condensing technology, exceptional build quality and long service life. When a Geminox boiler requires attention, it demands engineers who understand the brand's engineering in detail. At RARE Plumbing & Heating, we have extensive experience servicing, repairing and installing Geminox boilers across London's most prestigious homes and commercial properties.
Our Geminox services
Geminox fault codes explained
Common Geminox boiler error codes:
Ignition failure
No ignition detected within set time
Overheat fault
Boiler temperature protection triggered
Pressure fault
System pressure issue or sensor fault
Gas supply fault
Gas supply interruption or valve failure
Fan/flue fault
Flue blockage or fan motor failure
Flame loss
Flame goes out during operation
PCB fault
Control board malfunction
Geminox fault codes require proper diagnosis before restart. Call us immediately.
Common Geminox faults we fix
Geminox models we work on
We have specialist knowledge across the full Geminox range.
New Geminox boiler installation
Supply, installation & full commissioning.
Whether you're upgrading an ageing system or replacing like-for-like, RARE provides a complete white glove Geminox installation service. We handle everything from removal of your old boiler through to commissioning, smart controls integration and warranty registration.
- Removal of old boiler & full system flush
- Supply & installation of Geminox boiler
- Magnetic filter installation
- Smart thermostat & controls setup
- Gas Safe certification
- Warranty registration & aftercare
24/7 emergency Geminox repairs
Around-the-clock support, whenever you need us.
Geminox systems are built for longevity, which is exactly why faults can be unfamiliar to generalist engineers. We keep commonly needed parts on hand and quote transparently before any work starts, so a same-day fix is achievable in most cases with no unexpected costs on the invoice.
Book a Geminox Engineer
Available 24/7 — Gas Safe registered Geminox specialists across London.
020 7458 4949Book Online"Our Geminox Thision developed a fault mid-winter. RARE had an engineer with us within hours, diagnosed the issue immediately and had the part on the van. Exceptional service."
James W. · Kensington
"RARE are the only engineers I trust with our Geminox system. Their knowledge of these boilers is outstanding — highly professional and immaculate workmanship."
Arabella C. · Notting Hill
"Annual servicing and a same-day emergency repair — both handled perfectly. RARE are first class."
Thomas P. · Marylebone
Geminox repairs — complete topic guide
Boiler Repairs London
All-brand emergency repairs 24/7
Vaillant Boiler Repairs
ecoTEC specialists
Viessmann Boiler Repairs
Vitodens specialists
Worcester Bosch Repairs
Greenstar specialists
ATAG Boiler Repairs
iR series specialists
Keston Boiler Repairs
C-series specialists
Combi Boiler Installation
New boiler supply and fit
System Boiler Installation
For larger homes
Boiler Installation Costs
Full London pricing guide
Boiler Replacement Guide
Repair vs replace explained
Boiler Servicing
Annual Gas Safe service
Boiler Error Codes
Full fault code database
Geminox boiler questions answered
Everything you need to know before you call.
Related Services
Boiler Repairs London
All brands, 24/7 emergency response across London.
ATAG Boiler Repairs
Expert ATAG engineers, parts on every van.
Keston Boiler Repairs
Specialist Keston repairs across prime London.
Hamworthy Commercial Boilers
Cascade system and commercial Hamworthy specialists.
Combi Boiler Installation
New Geminox boiler supply and fit from £3,200.
System Boiler Installation
For larger homes with multiple bathrooms.
Hot Water Cylinder Installation
Megaflo & unvented cylinder specialists.
Boiler Installation Costs
Full London pricing guide.
Vaillant vs Viessmann
Brand comparison guide.
PPM Membership
Annual boiler service and priority response from £750.
Reviewed by RARE Plumbing London Engineering Team
Gas Safe Registered Heating Engineers · Reviewed 26 August 2026