BoilerFaultCodesWorcester Bosch rE Fault Code
Also written as RE — same fault.
The Worcester Bosch rE fault code means: your boiler is undergoing a system reset, which means it is attempting to restart itself after detecting an internal error or interruption.. It appears on 10 Worcester Bosch models in our database.
Technical description: The boiler resets
What causes the Worcester Bosch rE fault?
This fault occurs when the boiler's internal computer experiences a software glitch or a momentary loss of communication with its sensors. It is frequently triggered by a faulty control board or an incorrect reading from an outside temperature sensor that confuses the system's logic. The 'rE' code signifies that the boiler is stuck in a loop trying to reboot itself to clear these electronic errors.
DIY fix possible
Wait for the boiler to complete the reset sequence automaticallyPress and hold the reset button for 5 seconds if the code remains on the screenCheck if there has been a recent power cut or surge in your home
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Gas Safe Register →Worcester Bosch models that show the rE fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch rE 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