Hurry, don't miss savings on selected furniture & more.* Shop all offers
17 Products
Worcester Bosch Greenstar 25i 30 System 9 12 15 18 21 24 Cap Siphon 8716117065
Worcester Bosch
Worcester Bosch Worcester Bosch Genuine Boiler Part 87161155350 Washer Set
Worcester Bosch
Worcester Bosch Worcester Greenstar 25 Electrode Kit 87161163810
Worcester Bosch
Worcester Bosch Worcester Greenstar Junior 24i 28i Mk5 Condens Trap Siphon 87161066100
Worcester Bosch
Worcester Bosch Genuine Worcester Oil Heatslave Flow Switch Kit 87161200690
Worcester Bosch
Worcester Bosch Worcester Greenstar Heatslave DIV VLV Body 87161087220
Worcester Bosch
Worcester Bosch Worcester Greenstar ERP 25i 30i Boiler Expansion Vessel
Worcester BoschWorcester Bosch Boiler Spare Parts: Your essential buying guide
Start with the boiler make, model and any part number printed on the old component or in the manual. Matching the specification is the safest way to choose the right spare part, especially for electrical, pressure and control components.
Some parts are sold as broadly compatible, but boiler components are not all interchangeable. Check the product details carefully and make sure the part is suitable for your boiler type, output and installation setup.
Have the boiler model, serial details if available, the part number, and a clear note of the fault or worn component. This helps you compare like for like and avoid ordering the wrong replacement.
They are mainly used for repairs and maintenance, but they can also help keep a boiler running efficiently when a small component has worn out. Replacing the correct spare part is often more practical than replacing a larger assembly unnecessarily.
No. Some parts are simple mechanical replacements, while others involve seals, wiring, sensors or controls. Always follow the manufacturer guidance and use a qualified heating professional where the job requires it.
Boiler spare parts are all about precision. The right choice depends on the exact boiler and the component you are replacing, so careful matching is more important than broad category browsing. Use the guides below to narrow your options, check what type of part you need and make sure you are comparing suitable replacements for your system.
Before comparing anything, confirm the boiler make and model. Many spare parts look similar but are only suitable for specific appliances or versions.
If possible, note the part number from the existing component, service record or handbook. That detail can save time and reduce the risk of choosing the wrong replacement.
A part may look the same as the one you are replacing, but the internal fitting, connection type or operating spec can still be different. Compatibility is the key point when shopping for boiler spares.
Compare dimensions, connection points and manufacturer notes carefully, especially for sensors, valves, pumps and control items where a close visual match is not enough.
Boiler parts sit within a broader heating setup, so it can help to consider related equipment if you are diagnosing a fault. Nearby categories such as heating pumps, water heaters and fireplaces may also be relevant depending on the system you are working on.
If the fault is part of a larger heating issue, take a methodical approach and make sure you are replacing the right component rather than treating the symptom.
Some boiler spares are routine wear items, while others are critical control or safety components. A simple seal or clip is very different from a burner part, sensor or valve assembly.
Match the spare to the repair task and avoid over-specifying or under-specifying the component. That keeps the search focused and helps you compare suitable products more efficiently.
Boiler repairs can involve gas, electrics and pressure systems, so not every spare part is suitable for a DIY fix. If you are unsure about the job, use the category to compare the part itself and then get the fitting confirmed by a suitable professional.
For shoppers browsing from a DIY starting point, the most useful approach is to identify the exact spare part first, then decide whether the replacement is within your skill level.
