Worcester Bosch Boiler Installation Streatham & South West London
Looking for a Worcester Bosch boiler installation in Streatham or South West London? MAK Plumbing & Heating are Gas Safe registered Worcester Bosch specialists installing Greenstar 2000, Greenstar 4000 and Greenstar 8000 boilers across Streatham, Tooting, Balham, Clapham and Mitcham. We offer up to 12 years manufacturer warranty on Worcester Bosch Greenstar 8000 boilers. Worcester Bosch boiler installation from £1,950 inc. VAT — call 07900 247 384 for a free survey.
Worcester Bosch Boiler Installation Streatham & South West London
Greenstar 2000 · Greenstar 4000 · Greenstar 8000 — Up to 12 Year Warranty
Why Choose a Worcester Bosch Boiler?
Assembled in Worcester and backed by the Bosch Group, Worcester Bosch has topped independent UK reliability surveys for years running.
Which? Best Buy Brand
Worcester Bosch consistently ranks among the top 1-2 boiler brands in Which? reliability surveys, year after year.
Up to 12 Year Warranty
Greenstar 8000 boilers qualify for up to 12 years manufacturer warranty when installed and registered correctly.
94% Efficiency
A-rated across the range. The Greenstar 4000 and 8000 reach 94% ErP efficiency, meaningfully reducing your gas bills.
Quiet Mark Accredited
The Greenstar 8000 range carries Quiet Mark accreditation — among the quietest boilers you can install in a kitchen or bedroom cupboard.
Smart Controls
Compatible with Worcester Wave, Bosch EasyControl, Nest, Hive and other smart thermostats for full remote control.
Hydrogen Ready
The full Greenstar range is hydrogen-blend ready to 20%, future-proofing your home ahead of the UK’s energy transition.
The Worcester Bosch Range — Which Model Is Right for You?
Three ranges to suit different budgets and property types. We’ll help you choose the right one during your free survey.
Which Worcester Bosch Boiler Does Your Property Need?
Use this guide to identify the right model. We always confirm during the free survey.
| Property Type | Recommended Model | Output | Reason |
|---|---|---|---|
| Studio / 1-bed flat | Greenstar 2000 25 | 25kW | Low demand, compact |
| 2-bed flat / maisonette | Greenstar 4000 25 or Greenstar 2000 30 | 25-30kW | Moderate demand |
| 2-3 bed terraced house | Greenstar 8000 30 | 30kW | Best long-term value, 12yr warranty |
| 3-4 bed semi-detached | Greenstar 8000 35 | 35kW | Higher heating and hot water demand |
| 4+ bed / multiple bathrooms | Greenstar 8000 40/45 or system boiler | 40kW+ | High simultaneous demand |
| Victorian/Edwardian terrace | Greenstar 8000 regular or system | Various | Depends on existing pipework |
| Rental / HMO property | Greenstar 2000 or Greenstar 4000 | 25-30kW | Cost-effective, reliable |
South West London note: Most Victorian and Edwardian terraces in Streatham, Tooting and Balham benefit from our free survey to assess existing pipework condition before recommending the right model.
Worcester Bosch Boiler Installation Prices in South West London
All prices include VAT, power flush, magnetic filter, inhibitor treatment, Gas Safe certificate and warranty registration.
| Installation Type | Price (inc. VAT) | Duration |
|---|---|---|
| Greenstar 2000 — straight swap | From £1,950 | 1 day |
| Greenstar 4000 — straight swap | From £2,150 | 1 day |
| Greenstar 8000 — straight swap | From £2,750 | 1 day |
| Greenstar 8000 — relocation | From £3,150 | 1-2 days |
| System boiler + cylinder | From £3,400 | 1-2 days |
| Back boiler to combi conversion | From £2,600 | 2 days |
All prices include VAT, power flush, magnetic filter, inhibitor treatment, Gas Safe certificate and Worcester Bosch warranty registration. See our full boiler installation page for more details.
Up to 12 Years Warranty on Worcester Bosch Greenstar 8000
The Greenstar 8000 qualifies for Worcester Bosch’s industry-leading extended warranty. Four conditions must be met:
Worcester Accredited Installer
Must be installed by a Worcester Bosch Accredited Installer
MAK Plumbing qualifiesGreenstar System Filter
A Worcester Bosch Greenstar system filter must be fitted alongside the boiler
Included in every installRegistered Within 30 Days
Must be registered with Worcester Bosch within 30 days of installation
We register on install dayAnnual Service Required
A Gas Safe engineer must service the boiler every year
We offer service plansMissing a single service can void your warranty. We offer a boiler service plan to keep your warranty protected and your boiler running efficiently.
Common Worcester Bosch Boiler Fault Codes
Worcester Bosch boilers display fault codes on the screen to help diagnose problems. Here are the most common fault codes we attend in Streatham, Tooting and Balham:
Description: System water pressure has dropped below the safe minimum (some models display H07 instead).
Likely cause: System leak, or pressure not topped up after draining or bleeding radiators.
Description: Boiler is attempting to ignite but isn’t detecting a flame.
Likely cause: Gas supply issue, faulty ignition electrode, faulty gas valve.
Description: The external condensate pipe has frozen, blocking drainage and shutting the boiler down.
Likely cause: An external condensate pipe run without adequate insulation during prolonged sub-zero weather.
Description: Boiler has detected a circulation pump problem, often linked to low water pressure.
Likely cause: Low system pressure, an airlock, or a pump that has run dry or seized.
Description: An internal control fault has been detected within the boiler’s electronics.
Likely cause: Faulty circuit board (heat control module) or a wiring/connector fault.
Other Worcester Bosch Fault Codes
| Code | Name | Description |
|---|---|---|
| C1 | Fan Fault — No Airflow | Fan not running or no signal detected — engineer required |
| C6 | Fan Speed Fault | Fan running too fast or too slow — engineer required |
| C7 | Fan Not Running | Fan fails to start during ignition — engineer required |
| D1 | Return Sensor Fault | Return temperature sensor short or open circuit — engineer required |
| E2 | Flow Sensor Fault | Flow temperature sensor short or open circuit — engineer required |
| E9 | Safety Temperature Limiter | Boiler overheated and the safety thermostat has tripped — often low flow or an airlock |
| EC | Burner Control Unit Error | Internal burner control fault — engineer required |
| F1 | Control Box Fault | Heat control module defective — engineer required |
| F7 | False Flame Signal | Flame detected while the burner is off — engineer required |
| FA | Flame Detected After Shut-off | Ionisation signal present after the gas valve has closed — engineer required |
| FD | Mains Power Interruption | Brief loss of electrical supply, or reset button pressed — try resetting once |
| H07 | Low Water Pressure | Alternate code for the same fault as CE on some models — top up via the filling loop |
| HrE / rE | Boiler Continuously Resetting | Boiler is cycling through reset attempts without clearing the fault — call an engineer |
Worcester Bosch vs Vaillant — Which Should You Choose?
Both are premium brands trusted across the UK. Here is an honest comparison to help you decide.
| Feature | Worcester Bosch | Vaillant |
|---|---|---|
| Build Quality | Excellent | Excellent |
| Efficiency | 93-94% | 92-94% |
| Max Warranty | 12 years | 10 years |
| Premium heat exchanger | Stainless steel | Stainless steel |
| Entry price (supply) | From £650 | From £1,480 |
| Premium price (supply) | From £1,500 | From £1,850 |
| Which? Rating | Consistently No.1-2 | Top 3 |
| Smart controls | Wave / EasyControl | sensoHOME / Wave |
Our verdict: Both are excellent choices. Worcester Bosch edges Vaillant slightly in Which? surveys and offers a longer maximum warranty, while Vaillant’s ecoTEC plus offers excellent value compared to the equivalent Greenstar 8000. We install both — we’ll recommend the right brand for your property and budget.
We also specialise in Vaillant boiler installation across South West London.
Worcester Bosch Boiler Installation Areas We Cover
Based in Streatham SW16, we cover all of South West London. Free no-obligation survey.
Worcester Bosch Boiler FAQs
Common questions from homeowners across Streatham, Tooting, Balham and South West London.
Verify our Gas Safe registration: Gas Safe Register (939043) | More about Worcester Bosch boilers: worcester-bosch.co.uk
Get a Free Worcester Bosch Boiler Installation Quote
No obligation. We’ll survey your property and recommend the right Worcester Bosch model for your home.
Gas Safe: 939043 | Streatham, Tooting, Balham & South West London