E9 224
FAULT CODE
Worcester Bosch
Overheat — Safety Limiter Tripped (Code 224)
High Severity
Engineer Required
The safety temperature limiter has tripped due to overheating. Sub-code 224 typically indicates this occurred during the heating cycle.
Step-by-Step Fix Guide
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Step 1
Turn off and allow to cool for 30 minutes
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Step 2
Check and correct system pressure
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Step 3
Bleed radiators
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Step 4
Reset once
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Step 5 Engineer only
If E9 returns, a Gas Safe engineer must investigate 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.