E9 219
FAULT CODE
Worcester Bosch
Safety Sensor Fault — Temperature Exceeded
High Severity
Engineer Required
The safety temperature sensor has detected a temperature in excess of 105°C, or the sensor contacts have shorted. On CDi and Greenstar i boilers.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler and allow to cool
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Step 2 Engineer only
Call a Gas Safe engineer to test the safety sensor and identify the overheat cause
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.