BoilerFaultCodesWorcester Bosch F0 258 Fault Code
Also written as F0258 — same fault.
The Worcester Bosch F0 258 fault code means: your boiler's internal computer or control unit has encountered a serious communication error and can no longer operate your heating or hot water safely.. It appears on 12 Worcester Bosch models in our database.
Technical description: Control box or the heat control module (HCM) is defective – HCM or control box connections need to be checked
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 F0 258 fault code
Click a model for the full fault code list and model-specific repair notes.
- 24 RSF Repair: £250-£550
- 26 CDi Xtra Repair: £250-£450
- 30i Junior Repair: £280-550
- 35 RSF Repair: £250-£450
- Danesmoor Repair: £280-550
- Greenstar 12i System Repair: £250-450
- Greenstar CDi Compact Repair: £200-450
- Greenstar i Repair: £250-450
- Heatslave Repair: £280-550
- Hideaway Repair: £250-£450
- Junior 24i Repair: £250-£450
- Junior 28i Repair: £250-£450
Source
Worcester Bosch F0 258 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