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Shannon GlassAug 5, 2025
What to do if fault code F.xxx is displayed on my Vaillant Heat Pump?
- HhicksjermaineAug 6, 2025
If a fault code F.xxx appears on your Vaillant Heat Pump, the plain text display should explain the fault code. Rectify the fault, and then restart the product by pressing the reset button.
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