Worcester Greenstar Comfort+ Timer Key

The Worcester Greenstar Comfort+ Timer Key is a compact heating-control accessory used with specified Worcester Bosch Greenstar boilers. It adds supported timing functions through the boiler's control interface without requiring a separate full-size wall programmer in the usual arrangement.

Plug-in timer key for a compatible Greenstar heating control

The existing listing associates this timer key with certain Greenstar 8000 Style combi and system boilers. However, Greenstar is a family name covering several generations, so the boiler model and control revision must be checked before purchase. The product listing does not establish universal compatibility with every Worcester boiler.

Available sizes and buying options

• Product: Worcester Greenstar Comfort+ Timer Key

How to choose the right product

Look at the appliance model, installation documentation and the exact timer accessory part number. Decide whether simple time scheduling meets the household's requirements or whether the installation calls for a different compatible programmer, room thermostat or zoning arrangement.

Installation and project considerations

Electrical and control accessories must be fitted in accordance with Worcester Bosch's instructions. If the boiler case or electrical connections must be accessed, use an appropriately competent heating professional. Once fitted, test that heating schedules operate as intended and that existing safety and room-temperature controls are unaffected.

Related materials and buying advice

Compare boiler accessories and parts before making your selection. You can also browse central heating boilers alongside this product, find complementary heating system components for the job, and consult our boiler buying guide for wider guidance.

Frequently asked questions

What does the Comfort+ Timer Key do?

It provides compatible boiler-integrated heating time control.

Does it fit all Greenstar boilers?

No. Match the precise boiler and accessory references before ordering.

Is it a full room thermostat?

It is a timer accessory; the overall heating control functions depend on the connected system.

Do I need a separate programmer?

That depends on your boiler and controls setup. Check the manufacturer's approved options.

Can I fit it without checking the boiler documentation?

No. Confirm compatibility and follow the prescribed installation method.

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