This replacement Worcester Bosch control knob is compatible with Bosch, CDi Series, SBi Series, i Series and CDiXtra Series boilers.  Attached to a spindle on the boiler's control panel, a control knob allows for manual control of the appliance's functions.  As the leading supplier of parts for all the major boiler manufacturers we’ve got a wealth of experience and knowledge in this area, and with over 450 branches we carry more heating spare parts in more places than any other merchant to help you improve your first time fix rate.

Worcester Bosch boiler control knobe

Offering ErP A-rated heating and hot water delivery, the Worcester Bosch Greenstar 4000 GR4700iW 30 C NG combi boiler pack provides homeowners with economy, comfort and efficiency. Easy to install, this well-designed 30kW condensing combi boiler is supplied with a flue as well as a system filter for clean and reliable operation. The Greenstar 4000 is designed with a simple, clear display panel for ease of use and fast troubleshooting.

Worcester Bosch Greenstar 4000 GR4700iW 30 C NG combi boiler with flue and system filter 30kW

Ideal for supplying heat and hot water to single bathroom homes, the Worcester Bosch Greenstar 2000 GR2300iW 25 C NG combi boiler pack with flue is recommended for installation in apartments and smaller sized houses. ErP A-rated for its great levels of efficiency, this highly reliable 25kW combi offers compatibility with a variety of external 230V controls as well as Worcester Bosch's own mechanical and connected controls, giving homeowners the opportunity to build their ideal system for personalised comfort.

Worcester Bosch Greenstar 2000 GR2300iW 25 C NG combi boiler and flue pack 25kW

Suitable for apartments and small-medium houses, the Worcester Bosch Greenstar 2000 GR2300iW 30 C NG combi boiler pack is ideally suited to serving single bathroom properties. Fully compatible with third party external 230V controls as well as a wide range of Worcester mechanical and connected controls, this 30kW combi offers ErP A-rated levels of efficiency alongside excellent reliability.

Worcester Bosch Greenstar 2000 GR2300iW 30 C NG combi boiler only pack 30kW

Offering ErP A-rated heating and hot water delivery, the Worcester Bosch Greenstar 4000 GR4700iW 30 C NG combi boiler pack provides homeowners with economy, comfort and efficiency. Easy to install, this well-designed 30kW condensing combi boiler is supplied with a flue for quick fitting in one easy job. The Greenstar 4000 is designed with a simple, clear display panel for ease of use and fast troubleshooting.

Worcester Bosch Greenstar 4000 GR4700iW 30 C NG combi boiler and flue 30kW

Offering ErP A-rated heating and hot water delivery, the Worcester Bosch Greenstar 4000 GR4700iW 25 C NG combi boiler pack provides homeowners with economy, comfort and efficiency. Easy to install, this well-designed 25kW condensing combi boiler is supplied with a flue for quick fitting in one easy job. The Greenstar 4000 is designed with a simple, clear display panel for ease of use and fast troubleshooting.

Worcester Bosch Greenstar 4000 GR4700iW 25 C NG combi boiler and flue 25kW

Supplied with a telescopic flue for ease of fitting, even in a challenging spot, this Worcester Bosch Greenstar 24RI NG regular boiler is a practical choice for installation in small to medium sized homes. A compact unit suitable for hanging inside a standard kitchen cupboard, the Greenstar has a low lift weight, making the job of installing as straightforward as possible. In addition to a flue, this 24kW boiler is supplied with all fittings so it's ready to go straight out of the box.

Worcester Bosch Greenstar 24RI regular boiler pack with flue

The Worcester Bosch Greenstar 8000 Life GR8300iW 30 C NG follows in the footsteps of the popular CDi Classic, equally reliable and user-friendly but with improved efficiency and flexibility. With its contemporary design the 8000 Life looks good in any home and installation is quick and easy thanks to a lower lift weight and a familiar layout with all the same fixture points as the Classic. Daily use of this 30kW boiler is simple using the full colour text display and you have the option to go smart by hooking up with Bosch's EasyControl thermostat. Offering an ErP A rating this boiler helps homeowners to reduce fuel bills and lessen their household emissions.

Worcester Bosch Greenstar 8000 Life GR8300iW 30 C NG combi boiler 30kW White

Offering high heating and hot water output, the Worcester Bosch Greenstar CDi Highflow 440CDi NG combi, supplied with a horizontal flue, is ideal for installation in larger homes with two bathrooms. A robust floor standing boiler, the CDi Highflow is designed to sit beneath a standard kitchen countertop, making it easy to reach for installation, maintenance and control. Providing instant hot water in even the most demanding homes, this ErP A-rated boiler is highly efficient and reliable, with built-in frost protection to keep things running in even the worst weather.

Worcester Bosch Greenstar CDi Highflow 440CDi boiler and horizontal flue

The Worcester Bosch Greenstar 30i ErP NG system boiler is an ultra-modern compact and lightweight boiler designed to maximise available space in homes of just about any size. Highly reliable and extremely durable, this ErP A-rated boiler incorporates a low energy pump for reduced electrical requirements and a simple, clear display and controls for error-free operation. Compatible with a range of Worcester controls and the brand's Greenskies solar panels, the Greenstar is suitable for use as part of an advanced eco-friendly heating system.

Worcester Bosch Greenstar i System Compact ErP 30i NG boiler

Suitable for apartments and small-medium houses, the Worcester Bosch Greenstar 2000 GR2300iW 25 C NG combi boiler pack is ideally suited to serving single bathroom properties. Fully compatible with third party external 230V controls as well as a wide range of Worcester mechanical and connected controls, this 25kW combi offers ErP A-rated levels of efficiency alongside excellent reliability.

Worcester Bosch Greenstar 2000 GR2300iW 25 C NG combi boiler only pack 25kW

The wall-mounted Worcester Bosch Greenstar 4000 GR4700iW 25 C NG combi boiler pack offers an attractive design, improved installation and excellent performance. ErP A-rated for energy efficiency and water heating efficiency, this 25kW condensing combi boiler includes an intuitive display panel for ease of use.

Worcester Bosch Greenstar 4000 GR4700iW 25 C NG combi boiler only 25kW pack

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Worcester Bosch Boiler