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  • Vaillant Eco-Tec Fault Code F 75

    One of the most common fault codes with the Vaillant Eco-Tec is F 75.  This normally due to low water pressure, most of the time just by increasing the pressure to 1.2 bar and hitting the reset button the boiler will fire up.  Should the fault code show up again then further investigation needs to be carried out? Low water pressure is due to the system losing pressure somewhere, [...]

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