E55
FAULT CODE
Alpha
Flow Temperature Overheat
High Severity
Engineer Required
The flow temperature is excessively high, causing a protective lockout.
Step-by-Step Fix Guide
-
Step 1
Turn off the boiler and allow to cool
-
Step 2
Check system pressure and bleed radiators
-
Step 3
Reset once
-
Step 4 Engineer only
If fault returns, 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.