BoilerFaultCodesWorcester Bosch F0290 Fault Code
The Worcester Bosch F0290 fault code means: your boiler’s internal computer has lost contact with a vital control chip, meaning the system cannot run safely and will stay locked out.. It appears on 2 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
What causes the Worcester Bosch F0290 fault?
This fault occurs when the boiler's main control board loses communication with a specific chip called the Heat Code Module, which contains the boiler's 'identity' and safety settings. The most common reason is that this module has vibrated loose or has suffered an electrical failure, meaning the boiler can no longer verify which model it is and shuts down for safety.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Worcester Bosch models that show the F0290 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch F0290 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