70
FAULT CODE
Alpha
Return/Flow Sensor Wiring Fault (E-Tec)
Medium Severity
Engineer Required
On Alpha E-Tec boilers, code 70 indicates a wiring or connection issue with the return or flow sensor.
Step-by-Step Fix Guide
-
Step 1 Engineer only
Call a Gas Safe engineer to inspect and repair the sensor wiring
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.