Vaillant ecoTEC Pro 28 Combi F.73 – Fault: Water press. sensor (signal too weak)

F.73

Fault: Water press. sensor (signal too weak)

Vaillant ecoTEC Pro 28 Combi

Possible cause

Water pressure sensor reports that the water pressure is too low

Measure

Check: Water pressure, earth connection, cable, plug, water pressure sensor (short circuit to GDN).

This code also applies to: