Vaillant Boilers & Parts

Combi

ecoTEC Plus Combi Boiler

Vaillant's flagship combi — ErP A-rated, compact wall-hung design. Suits most UK homes with one bathroom. Available in 25–35 kW outputs.

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Combi

ecoTEC Pro Combi Boiler

Slimline combi ideal for apartments and smaller properties. ErP A-rated with built-in frost protection and simple installer setup.

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System

ecoTEC Plus System Boiler

Works with a separate hot water cylinder — ideal for larger homes with multiple bathrooms. High-efficiency condensing operation.

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Heat Only

ecoTEC Plus Heat Only

Open-vent heat-only boiler for traditional gravity-fed systems. Pairs with a header tank and hot water cylinder. Reliable long-term replacement.

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Part

Diverter Valve Assembly

Genuine Vaillant diverter valve for ecoTEC combi models. Restores correct switching between central heating and hot water circuits.

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Part

Primary Heat Exchanger

OEM-spec primary heat exchanger for ecoTEC Plus and Pro ranges. Resolves overheating faults and loss of heating output.

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Part

Circulation Pump Assembly

Replacement pump for Vaillant ecoTEC boilers. Addresses no-heat faults caused by pump failure or seized impeller.

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Part

Main PCB Control Board

Genuine Vaillant main PCB for ecoTEC series. Resolves F.28, F.29 and other ignition or control fault codes.

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Not sure which part you need? Bring your boiler's model number and fault code to our Chesham trade counter — our team will identify the correct Vaillant part and check stock on the spot. We stock a wide range of genuine Vaillant spares and can order less common items quickly.

Baxi Glow-worm Ideal Keston Potterton Worcester Bosch