BoilerFaultCodesWorcester Bosch 265 Fault Code
The Worcester Bosch 265 fault code means: your boiler is temporarily turning itself off because your radiators or taps aren't taking away the heat as fast as the boiler is producing it, often due to poor water flow.. It appears on 10 Worcester Bosch models in our database.
Technical description: Heat demand lower than energy supplied
What causes the Worcester Bosch 265 fault?
Energy imbalance
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Worcester Bosch models that show the 265 fault code
Click a model for the full fault code list and model-specific repair notes.
- 24i / 28i Junior Repair: £0-120
- Greenstar 1000 Repair: £120-250
- Greenstar 2000 Repair: £120-250
- Greenstar 27i System Compact ErP Repair: £120-250
- Greenstar 30i System Compact ErP Repair: £120-250
- Greenstar 8000 F Repair: £120-250
- Greenstar 8000+ Repair: £120-250
- Greenstar 8000+ Style Repair: £120-250
- Greenstar CDi Compact Repair: £120-250
- Greenstar i
Source
Worcester Bosch 265 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 31 August 2026