Vaillant ecoTEC Pro 28 Combi F.74 – Fault: Water press. sensor (signal too strong) | BoilerTool

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F.74

Fault: Water press. sensor (signal too strong)

Vaillant ecoTEC Pro 28 Combi

Possible cause

Water pressure too high

Measure

1. Drain water. 2. Check the water pressure sensor.

This code also applies to:

ecoTEC Pro 24 Combi ecoTEC Pro 30 Combi

Source: Manufacturer manual (PDF)

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