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Heating, Home Heating Systems (31117 other questions)
Related questions - change, time, boiler, lock
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Change time on boiler. Clock?

How can I change the time on my boiler.
It’s a Worcester Bosch model 28SI 11

Mrs B Farquhar
March 2019

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Need to mend your Bosch 28si home heating system?

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Answers - mend, repair, fix

What did you find when you did your own G**gle search for a manual? The only manual I could find fo ryour boiler doesnt show any clock on the boiler:

Is your timer ON the boiler? If not, what make and model is your timer?

April 2019

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