E16
FAULT CODE
Alpha
Maximum Temperature Exceeded
High Severity
Engineer Required
The boiler water temperature has exceeded its absolute maximum limit.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler immediately
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Step 2
Allow to cool for at least 30 minutes
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Step 3 Engineer only
Do not reset without first calling 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.