Vaillant ecoTEC Pro 30 Combi F.71 – Fault: Flow sensor | BoilerTool

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F.71

Fault: Flow sensor

Vaillant ecoTEC Pro 30 Combi

Possible cause

Flow temperature sensor returns implausible values

Measure

Check: Flow temperature sensor (correct thermal connection).

This code also applies to:

ecoTEC Pro 24 Combi ecoTEC Pro 28 Combi

Source: Manufacturer manual (PDF)

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