E02
FAULT CODE
Sime
Overheat Protection
High Severity
Engineer Required
The safety thermostat has activated due to overheating.
Step-by-Step Fix Guide
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Step 1
Allow the boiler to cool for 30 minutes
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Step 2
Check system pressure
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Step 3 Engineer only
Reset — if it recurs, call a Gas Safe engineer to check the pump and circulation
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.