E07
FAULT CODE
Alpha
Overheat Sensor Tripped
High Severity
Engineer Required
The main overheat safety sensor (STB) has activated due to excessive boiler temperature.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler and allow to cool for at least 30 minutes
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Step 2
Do not repeatedly reset
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Step 3 Engineer only
Call a Gas Safe engineer to investigate the root cause (pump, blockage, or sensor fault)
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.