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Vaillant Fault Code F.52
- Richard Weedon
- Feb 28, 2021
- 1 min read
F.52
Contact fault mass flow sensor/Venturi: The mass flow sensor/Venturi is not connected electrically – The plug is not plugged in correctly – The plug is not plugged in – The plug is defective – The slot is defective (loose connection) – Mass flow sensor/Venturi defective
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