A7
FAULT CODE
Worcester Bosch
Flow Temperature Sensor Fault
Medium Severity
Engineer Required
The flow NTC thermistor is giving a reading outside its expected range. Similar to E2, typically indicating a sensor or wiring fault.
Step-by-Step Fix Guide
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Step 1
Reset once
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Step 2 Engineer only
Call a Gas Safe engineer to test the flow sensor and wiring harness
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.