Vaillant ecoTEC Plus Combi F.344 – The control electrode can no longer be used. | BoilerTool

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F.344

The control electrode can no longer be used.

Vaillant ecoTEC Plus Combi

Possible cause

Transmission fault for calibration values

Measure

Replace the control electrode (D.146, D.147).

This code also applies to:

ecoTEC Plus System

Source: Manufacturer manual (PDF)

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