E05
FAULT CODE
Alpha
Return Sensor Fault
Medium Severity
Engineer Required
The return temperature sensor (NTC thermistor) has failed or has a wiring fault.
Step-by-Step Fix Guide
-
Step 1 Engineer only
Call a Gas Safe engineer to test and replace the return NTC 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.