Perfect for small to medium sized homes with one bathroom. Modern new design, quiet operation and ...Perfect for small to medium sized homes with one bathroom. Modern new design, quiet operation and easy to use full colour text display. Wide power range to efficiently meet all heating and hot water needs. This product should only be installed by a Gas Safe registered engineer. Unfortunately due to the nature of the products and for safety reasons, we cannot accept returns on unwanted boilers (your statutory rights are not affected). Worcester Bosch Worcester Greenstar Combi 4000 Boiler 25kW in White
Worcester Bosch Greenstar 4000 Combi Natural Gas Boiler 25 kW offers an attractive design, improved installation and excellent performance. Er P A-rated for energy efficiency and water heating efficiency, this 25 kW condensing combi boiler includes an intuitive display panel for ease of use.
Built on all the tried, tested and much-loved features of the Greenstar i, the Greenstar 4000 is instantly familiar and yet totally transformed in appearance, performance and installer plus points. We’ve raised the bar with the speed and ease of installation, commissioning and servicing, alongside improvements in efficiency and control. Ease of installation SimpleSwitch to previous Worcester i Junior and Si models with pre-piping jig offering rear piping as standard Flexibility of siting provided by long flue lengths (up to 12m with 60/100mm flues), 500ml integrated condensate siphon to reduce the risk of freezing and the boiler's ability provide full hot water flow rates in low water pressure areas Complete peace of mind for the end user with a 10-year heat exchanger and a 7-year product guarantee available as standard. Wide modulation range designed to optimise efficiency when heating demand is low. High-end design, quiet operation (up to 45dB(A)) with an intuitive, long text, colour boiler display offering optional intelligent filling solutions
This guide is for homeowners with small to medium-sized homes who want efficient heating and hot water. The Worcester Bosch Greenstar Combi 4000 Boiler (25kW) offers an attractive design, quiet operation, and easy-to-use display, providing excellent performance and efficiency. Remember that installation must be done by a Gas Safe registered engineer.
All features
Model Part Number
7733600371
Brand
Bosch
Extended Product Information
FAQs
Who should install this boiler?
A Gas Safe registered engineer must install the boiler.
What is the warranty period?
The heat exchanger has a 10-year warranty, and the product comes with a 7-year guarantee.
How often should the boiler be serviced?
It is recommended to have the boiler serviced annually by a qualified engineer.
What type of gas does this boiler use?
This boiler uses natural gas.
Can I return the boiler if I change my mind?
Due to the nature of the product, returns are generally not accepted unless your statutory rights are affected.
What is the modulation range?
The boiler has a wide modulation range designed to optimize efficiency when heating demand is low.
What is the noise level of the boiler?
The boiler operates at up to 45dB(A).
Troubleshooting
Boiler not starting
Check the gas supply, power supply, and ensure the boiler is switched on.
No hot water
Check the water pressure and the boiler settings. Also, ensure the gas supply is active and the pilot light is lit (if applicable).
Radiators not heating up
Check the system pressure and bleed the radiators to remove any trapped air.
Error codes on display
Consult the user manual for specific error code meanings and troubleshooting steps.
Pros and Cons
Pros
Attractive and modern design.
Quiet operation, ensuring minimal noise.
User-friendly full-color text display.
High energy efficiency with Er P A-rating.
Offers a wide modulation range to optimize efficiency.
Long warranty period for peace of mind.
Cons
Installation must be carried out by a Gas Safe registered engineer.
Returns are not accepted due to the nature of the product.
Requires professional installation, adding to initial costs.
May require adjustments to existing plumbing for optimal performance.
Condensate siphon may need protection in freezing conditions.
Setup, Compatibility & Care
Installation: Installation must be performed by a Gas Safe registered engineer.
Compatibility: Compatible with standard UK gas supply and plumbing systems.
Care: Regular servicing is recommended to maintain optimal performance and efficiency. Refer to the manufacturer's guidelines for detailed care instructions. Ensure the area around the boiler is kept clear for adequate ventilation and access.
Display: The intuitive, long text, colour boiler display offers optional intelligent filling solutions.