BoilerFaultCodesWorcester Bosch F0 290 Fault Code
Also written as F0290 — same fault.
The Worcester Bosch F0 290 fault code means: your boiler's internal computer has encountered a critical error and can no longer communicate with the main controls, meaning the unit will not fire up.. It appears on 12 Worcester Bosch models in our database.
Technical description: Control box is defective – HCM needs checking as it might not be inserted properly or need replacing
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 290 fault code
Click a model for the full fault code list and model-specific repair notes.
- 24 RSF Repair: £250-£450
- 26 CDi Xtra Repair: £280-450
- 30i Junior Repair: £180-£350
- 35 RSF Repair: £250-£450
- Danesmoor Repair: £180-£450
- Greenstar 12i System Repair: £300-500
- Greenstar CDi Compact Repair: £200-400
- Greenstar i Repair: £250-450
- Heatslave Repair: £180-£350
- Hideaway Repair: £180-350
- Junior 24i Repair: £280-450
- Junior 28i Repair: £180-350
Source
Worcester Bosch F0 290 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