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If your Vaillant boiler displays the F64 fault code, you can try the following steps:

The combustion fan in a Vaillant condensing boiler is a with a Hall-effect speed sensor. The control loop:

Vaillant F64 Fault Code Jun 2026

If your Vaillant boiler displays the F64 fault code, you can try the following steps:

The combustion fan in a Vaillant condensing boiler is a with a Hall-effect speed sensor. The control loop: