As one of Europe’s leading heating technology manufacturers, Vaillant have been setting heating standards for over 140 years

The best Vaillant boiler deals

Find out more about the all the Vaillant boilers that are available.

Vaillant are one of the longest-serving domestic heating manufacturers around, so we’ve had a lot of time to get used to their systems. Our expert engineers are well-versed in the components and model types produced by Vaillant and would be happy to advise you on choosing the best heating system, as well as maintaining, repairing and installing their products.

Vaillant products feature high energy efficiency ratings and low emissions and have an excellent reputation for performance, quality and reliability.

vaillant ecotec pro 30combi interest free

From only



NO deposit from


Per month 9.9% APR Representative*

Your boiler package includes


  • Up to 10 year warranty
  • Flue kit worth up to £100 RRP
  • Magnetic filter worth up to £100 RRP
  • Wireless thermostat (combi boilers only)
  • A chemical system flush
  • Expert installation by a gas safe registered engineer
  • All fixtures, fittings and safety checks

Typical finance

How does finance work on a new Vaillant Boiler?
*Representative Example
Item Value (Cash Price)£2,219
Total amount of credit£2,219
Agreement duration120 months
Annual rate of interest6.9% PA
Representative APR6.9% APR
120 monthly payments£25.41
Total amount payable£3,049.49
  • Be at least 18 years old.
  • Be in full time work (16 hours or more a week), retired, or in receipt of disability allowance.
  • Earn at least £6,000 a year.
  • Have been a UK resident for three years or more
  • Have a mobile phone number
  • Have an email address
  • Have a UK bank account from which Direct Debits can be taken
  • Have no outstanding County Court Judgements (CCJs)

We are an Appointed Representative of Koze Group Limited FRN 811281. Gas Call Services Limited FRN 983712 acts on behalf of Koze Group as a credit broker, not a lender and offers credit products from their lender BNP Paribas. Credit subject to age and status.

System types

Vaillant manufactures a range of heating systems such as a combi, regular and system. While Vaillant combi boilers are ideal for smaller homes, system boilers can cope with higher demands. while regular boilers are most common in older properties.

Our Vaillant range comprises of the following:

    • Vaillant Ecotec Pro 30 combi
    • Vaillant Ecotec Plus 835 combi
    • Vaillant Ecotec Plus 418 regular

Vaillant Ecotec Plus 424 regular

What is the warranty for a Vaillant boiler?

All of our Vaillant systems come with an amazing 10-year warranty. We guarantee a FULL manufacturer-backed warranty which will cover you for all repairs, labour, call-outs, and parts.


Ecotec Pro 30

The ecoTEC Pro range of Vaillant combi boiler combine the built-in quality, reliability and performance you’d expect from Vaillant, with a simple design and approach. This highly efficient system has been awarded the Quiet Mark Accreditation and with us, you’ll get a free 10-year warranty on all parts, labour and call-outs.

  • Hot water flow rate: 12.3
  • Central heating output: 30kW
  • Warranty duration: 10 years
  • Dimensions: 720 x 440 x 338
Fixed price quote


Ecotec Pus 835

The Vaillant ecoTEC plus range of high-efficiency heating systems combine fantastic efficiency levels and high performance with great usability. Thanks to continuous modulation and real combustion control by a multi-sensor system, they achieve high efficiency at the lowest emissions.

  • Hot water flow rate: 14.3
  • Central heating output: 35kW
  • Warranty duration: 10 years
  • Dimensions: 720 x 440 x 372
Fixed price quote


Ecotec Plus 418 & 424

Extremely reliable and displaying all the in-built quality you’ve come to expect from Vaillant, the ecoTEC plus is clearly one of the best open vent solutions available today – Where homes utilise a traditional open-vented system to provide their heating and hot water, the ecoTEC plus open vent system is the ideal way to deliver exceptional energy-efficient performance.

  • Central heating output: 18 – 24kW
  • Warranty duration: 10 years
  • Dimensions: 602 x 375 x 320
Get a fixed price quote

Common problems

Sometimes your central heating will have issues, we all have our off days. So, we’re here to tell you a list of common problems that you can fix at home or can be sorted by one of our gas safe engineers quickly.

  • F22 fault – common in Ecotec Plus and Ecotec Pro models, this is caused by a lack of pressure or water, putting the system into a limp mode. Prolonged firing could damage the interior parts.
  • F27 fault – this is when the sensor has detected that the flame is not correct. This could be due to a faulty PCB, gas valve or flame sensor.
  • F28/F29 fault – one of these codes will display following a lockout, or no heating/hot water. It is caused by a lack of gas supply.
  • F75 fault – this is displayed when the water pressure sensor or pump is defective, causing low pressure. This can be caused by the central heating pump, pressure sensor, or both.

Check out our Vaillant fault code guide if you have any error fault codes that weren’t listed above.

Vaillant Boiler Repairs

A Gas Safe Registered engineer must be called to deal with all problems relating to gas. F27 faults will need a replacement component or a new central heating system installed in the case of a faulty PCB. F75 faults may need an upgrade to a newer, Grundfos pump, which our local engineers carry on board.