BoilerFaultCodesWorcester Bosch CE207 Fault Code
The Worcester Bosch CE207 fault code means: your boiler has stopped working because there is not enough water pressure in the system to operate safely.. It appears on 1 Worcester Bosch model in our database.
Technical description: Water pressure is too low
What causes the Worcester Bosch CE207 fault?
This fault occurs when the water pressure inside your heating system drops below the minimum level required for the boiler to fire up. The most common reasons are a slow leak from a radiator valve or pipework, or the air pressure in the expansion vessel has depleted over time, causing water to be expelled through the safety valve.
This issue is more frequent in autumn when the heating is turned on for the first time after summer, as the change in temperature can highlight minor leaks or air pockets.
DIY fix possible
Locate the internal or external filling loop (the silver braided hose)Slowly open the valve(s) to allow water into the systemClose the valves once the pressure gauge reaches 1.5 bar
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Gas Safe Register →Worcester Bosch models that show the CE207 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch CE207 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