1073 W
FAULT CODE
Worcester Bosch
Flow Temperature Sensor Short Circuit (8000 Series)
Medium Severity
Engineer Required
On 8000 Series boilers, code 1073 W indicates a short circuit in the flow temperature sensor.
Step-by-Step Fix Guide
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Step 1 Engineer only
Call a Gas Safe engineer to test and replace the flow temperature sensor
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.