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    F23 error Vaillant EcoTec Plus

    I had two error codes coming up on my vallaint ecoTEC plus 831 F23 and F72 for about a month. The problem was resolved by switching off the warm start. The warm start can be turned off by turning the water temperature to the cold side fully and the C icon on the screen should disappear.
  2. A

    F23 error Vaillant EcoTec Plus

    I had two error codes coming up on my vallaint ecoTEC plus 831 F23 and F72
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