Vaillant Boiler Installation Streatham & South West London
Looking for a Vaillant boiler installation in Streatham or South West London? MAK Plumbing & Heating are Gas Safe registered Vaillant specialists installing ecoFIT sustain, ecoTEC pro and ecoTEC plus boilers across Streatham, Tooting, Balham, Clapham and Mitcham. We offer up to 10 years manufacturer warranty on Vaillant ecoTEC plus boilers. Vaillant boiler installation from £1,800 inc. VAT — call 07900 247 384 for a free survey.
Vaillant Boiler Installation Streatham & South West London
ecoFIT Pure · ecoTEC Pro · ecoTEC Plus — Up to 10 Year Warranty
Why Choose a Vaillant Boiler?
Vaillant have been manufacturing boilers in Germany since 1874. Here is why they remain one of the UK’s top-selling brands.
German Engineering
Built to last with over 150 years of manufacturing heritage. A-rated efficiency across the entire range.
Up to 10 Year Warranty
ecoTEC plus boilers qualify for up to 10 years manufacturer warranty when installed and registered correctly.
94% Efficiency
A-rated across the range. The ecoTEC plus reaches 94% SEDBUK efficiency, meaningfully reducing your gas bills.
Ultra Quiet
Especially the ecoTEC plus range. Quiet enough to install in a kitchen or bedroom cupboard without disturbance.
Smart Controls
Compatible with Vaillant sensoHOME, sensoAPP, Nest, Hive and other smart thermostats for full remote control.
Hydrogen Ready
Vaillant boilers are 20% hydrogen blend ready, future-proofing your home ahead of the UK’s energy transition.
The Vaillant Boiler 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 Vaillant 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 | ecoFIT sustain 25 | 25kW | Low demand, compact |
| 2-bed flat / maisonette | ecoTEC pro 24 or ecoFIT sustain 30 | 24-30kW | Moderate demand |
| 2-3 bed terraced house | ecoTEC plus 830 | 30kW | Best long-term value, 10yr warranty |
| 3-4 bed semi-detached | ecoTEC plus 835 | 35kW | Higher heating and hot water demand |
| 4+ bed / multiple bathrooms | ecoTEC plus 838 or system boiler | 38kW+ | High simultaneous demand |
| Victorian/Edwardian terrace | ecoTEC plus heat only or system | Various | Depends on existing pipework |
| Rental / HMO property | ecoFIT sustain or ecoTEC pro | 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.
Vaillant 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 |
|---|---|---|
| ecoFIT sustain — straight swap | From £1,500 | 1 day |
| ecoTEC pro — straight swap | From £1,800 | 1 day |
| ecoTEC plus — straight swap | From £2,200 | 1 day |
| ecoTEC plus — relocation | From £2,800 | 1-2 days |
| System boiler + cylinder | From £3,200 | 1-2 days |
| Back boiler to combi conversion | From £2,500 | 2 days |
All prices include VAT, power flush, magnetic filter, inhibitor treatment, Gas Safe certificate and Vaillant warranty registration. See our full boiler installation page for more details.
Up to 10 Years Warranty on Vaillant ecoTEC plus
The ecoTEC plus qualifies for Vaillant’s industry-leading extended warranty. Three conditions must be met:
Gas Safe Registered Engineer
Must be installed by a Gas Safe registered heating engineer
MAK Plumbing qualifiesRegistered Within 30 Days
Must be registered with Vaillant 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 Vaillant Boiler Fault Codes
Vaillant 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: Water pressure has dropped below 0.5 bar.
Likely cause: System leak, pressure relief valve discharged.
Description: Boiler attempting to ignite but failing.
Likely cause: Gas supply issue, faulty ignition electrode, faulty gas valve.
Description: Boiler lights then loses flame during operation.
Likely cause: Intermittent gas supply, condensate pipe blockage (in winter), faulty gas valve.
Description: No pressure change detected when pump starts.
Likely cause: Most commonly a faulty pressure sensor (£25-50 part). Can also be failed pump or air in system.
Description: Pressure sensor short circuit or open circuit.
Likely cause: Faulty pressure sensor, wiring fault.
Other Vaillant Fault Codes
| Code | Name | Description |
|---|---|---|
| F.00 | NTC Flow Sensor Short Circuit | Temperature sensor fault — engineer required |
| F.01 | NTC Return Sensor Short Circuit | Return temperature sensor fault — engineer required |
| F.20 | Safety Temperature Limiter | Boiler overheated — often low flow, airlock or pump fault |
| F.23 | Temperature Differential | Too large a difference between flow and return — pump or blockage issue |
| F.24 | Temperature Rise Too Fast | Rapid temperature increase — pump failure or blockage |
| F.35 | Fan Speed / Flue Gas Fault | Fan or flue issue — engineer required |
| F.49 | eBUS Fault | Communication fault between boiler and controls |
| F.54 | Gas Pressure Too Low | Low gas supply pressure — check meter, call National Gas or engineer |
| F.61 | Gas Valve Fault | Gas valve control or wiring fault — engineer required |
| F.62 | Gas Valve Delayed Closure | Gas valve taking too long to close — replacement likely required |
| F.63 | EEPROM Error | PCB memory fault — PCB replacement usually required |
| F.65 | PCB Temperature Too High | PCB overheating — check for ventilation blockage, engineer required |
| F.67 | Flame Detection Fault | Flame sensor fault — engineer required |
| F.72 | Flow / Return Sensor Fault | Sensors reading different when they should match |
| F.76 | Heat Exchanger Sensor Fault | Primary heat exchanger temperature sensor — engineer required |
| F.77 | Condensate Pump / Neutraliser Fault | Condensate neutraliser or pump issue — check condensate drain |
Vaillant vs Worcester Bosch — Which Should You Choose?
Both are premium brands trusted across the UK. Here is an honest comparison to help you decide.
| Feature | Vaillant | Worcester Bosch |
|---|---|---|
| Build Quality | Excellent | Excellent |
| Efficiency | 92-94% | 92-94% |
| Max Warranty | 10 years | 10 years |
| Mid-range heat exchanger | Aluminium | Stainless steel |
| Entry price (supply) | From £700 | From £650 |
| Premium price (supply) | From £1,200 | From £1,500 |
| Which? Rating | Top 3 | Consistently No.1-2 |
| Smart controls | sensoHOME / Wave | Wave / EasyControl |
Our verdict: Both are excellent choices. Worcester Bosch edges Vaillant slightly in Which? surveys, but 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 Worcester Bosch boiler installation across South West London.
Vaillant Boiler Installation Areas We Cover
Based in Streatham SW16, we cover all of South West London. Free no-obligation survey.
Vaillant 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 Vaillant boilers: vaillant.co.uk
Get a Free Vaillant Boiler Installation Quote
No obligation. We’ll survey your property and recommend the right Vaillant model for your home.
Gas Safe: 939043 | Streatham, Tooting, Balham & South West London