BoilerFaultCodesWorcester Bosch 2927 Fault Code
The Worcester Bosch 2927 fault code means: your boiler has attempted to light the flame but cannot detect that it has successfully ignited, so it has shut down as a safety precaution.. It appears on 9 Worcester Bosch models in our database.
Technical description: Boiler electr. system fault - No ionisation detected after ignition.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the 2927 fault code
Click a model for the full fault code list and model-specific repair notes.
- 1000 Repair: £150-300
- Greenstar 2000 Repair: £150-300
- Greenstar 27CDi Repair: £150-300
- Greenstar 28CDi Repair: £150-300
- Greenstar 4000 Repair: £150-300
- Greenstar 8000 Repair: £150-300
- Greenstar 8000 Life Repair: £150-300
- Greenstar 8000 Life System Repair: £150-300
- Greenstar 8000 Style Repair: £150-300
Source
Worcester Bosch 2927 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026