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BoilerCodes
b1
Worcester Bosch fault code

Worcester Bosch b1: code plug not detected

Engineer only

Worcester Bosch describes b1 on Greenstar CDi Classic boilers as: code plug not detected.

What you can safely do

There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.

Call a Gas Safe engineer if

  • Book a Gas Safe registered engineer.
Find a Gas Safe engineer near you Opens the official Gas Safe Register search.

Applies to: Greenstar CDi Classic. Codes can differ between models, so check your manual.

What b1 means on each Worcester Bosch model

From Worcester Bosch's own fault tables. Your model name is usually on the front of the boiler or in the user manual.

ModelMeaning
Greenstar CDi ClassicCode plug not detected

Common questions about Worcester Bosch b1

Can I fix Worcester Bosch b1 myself?

No. It needs a Gas Safe registered engineer to diagnose. Tell them the exact code and your boiler's model name.

Nearby Worcester Bosch codes

10371065106810731074A7E2F0

See all 28 Worcester Bosch codes

Sources