High
1010 on Worcester Bosch Greenstar 4000 GR4700iW 25 C

Your boiler's electronic control panel is currently unable to send or receive signals, causing the system to stop operating to prevent errors.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

No communication via EMS BUS connection

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar 4000 Combi installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Boiler cover options

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All 92 fault codes on the Greenstar 4000 GR4700iW 25 C

Seeing a different code? Every code this model can display, in one place.

200201202203204208214224227228232233234235237238242245249250251252253254258259262263265268269273281283284305306353357358360362363101310171018101910211023103710651068107010711072107310741075107620852908291029142915291629202923292729282931294029462948294929502951295229572961 V2962 V2963 B2964 B2965 B2966 B2967 B2968 O2969 –2970 B2971 B2972 V3071 –

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