BoilerFaultCodesWorcester Bosch E00-722 Fault Code
Also written as E00722 — same fault.
The Worcester Bosch E00-722 fault code means: your boiler's main control computer has developed an internal electrical fault and can no longer safely operate the system.. It appears on 1 Worcester Bosch model in our database.
Technical description: Circuit Board Bosch, Type Heatronic II282
What causes the Worcester Bosch E00-722 fault?
This fault occurs when the boiler's internal computer experiences a critical communication failure or a short circuit on the main control board. The most common reason is age-related wear to the electrical components, though occasional power surges or water leaks onto the wiring can also trigger this total system failure.
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 E00-722 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch E00-722 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