71
FAULT CODE
Alpha
No Primary Temperature Rise Detected (E-Tec Regular)
High Severity
Engineer Required
After ignition, the boiler has not detected a temperature rise in the primary circuit — indicating a serious circulation fault or airlock preventing heat from being distributed.
Step-by-Step Fix Guide
-
Step 1
Check system filling and venting
-
Step 2
Try bleeding all radiators
-
Step 3
Check for closed valves causing airlocks
-
Step 4 Engineer only
If fault persists, call a Gas Safe engineer
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.