F.32
FAULT CODE
Vaillant
Fan Error
High Severity
Engineer Required
The boiler fan is not reaching the required speed for safe ignition, or the fan speed sensor is faulty. The fan is essential for safe removal of combustion gases.
Step-by-Step Fix Guide
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Step 1
Do not attempt to fix the fan yourself
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Step 2
Turn off the boiler
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Step 3 Engineer only
Call a Gas Safe engineer — the fan motor or fan speed sensor will need testing and likely replacement
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.