BoilerFaultCodesWorcester Bosch 2.F Fault Code
Also written as 2F — same fault.
The Worcester Bosch 2.F fault code means: your boiler is in a normal operating mode, likely a service mode or a temporary state where it is monitoring its internal temperature sensors.. It appears on 1 Worcester Bosch model in our database.
Technical description: Operating mode
What causes the Worcester Bosch 2.F fault?
This code is triggered when the boiler enters a self-diagnostic or monitoring mode to check the temperature difference between its internal sensors. It often occurs if the boiler detects a rapid rise in heat and needs to briefly pause the burner to ensure water is circulating correctly. In most cases, it is a temporary state rather than a component failure.
DIY fix possible
Check if the boiler is set to a specific service or chimney sweep modePress the 'Reset' button to clear the temporary statusWait 15 minutes to see if the status clears itself during normal operation
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 2.F fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2.F 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