BoilerFaultCodesWorcester Bosch 207 Fault Code
The Worcester Bosch 207 fault code means: your boiler has stopped working because the water pressure inside your heating system has dropped too low to operate safely.. It appears on 4 Worcester Bosch models in our database.
Technical description: CE System pressure too low
DIY fix possible
Locate the external filling loop (a silver braided hose) underneath the boiler.Open the two valves on the loop slowly to allow water into the system.Watch the pressure gauge on the front of the boiler until it reaches 1.5 bar, then firmly close both valves.
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Worcester Bosch models that show the 207 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 207 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch 24/28/35 CDi MkII manual (PDF)
- Worcester Bosch Greenstar 12i System manual (PDF)
- Worcester Bosch Greenstar 28CDi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026