E55
FAULT CODE
Baxi
Fan Speed Fault
High Severity
Engineer Required
The fan is running outside its normal speed range — either too fast or too slow. The boiler cannot safely ventilate the combustion chamber.
Step-by-Step Fix Guide
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Step 1
Listen for unusual fan noises — grinding or rattling can indicate bearing failure
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Step 2
A Gas Safe engineer will need to test the fan and its wiring
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Step 3 Engineer only
The fan motor may need replacing
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.