F16
FAULT CODE
Ideal
Fan Fault
High Severity
Engineer Required
The fan is not running at the correct speed or has stopped. The boiler cannot safely ventilate combustion gases.
Step-by-Step Fix Guide
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Step 1
Listen for the fan — you should hear it start before the burner fires
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Step 2
If there is no fan noise or unusual grinding sounds, the fan may have seized
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Step 3 Engineer only
A Gas Safe engineer will need to test and potentially replace the fan
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.