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Mend Saunier Duval E80 Hot Pressure Manual Help

MY VALIANT SCREEN SHOWS f1. WHAT DOES THIS MEAN/?

I have no hot water at the moment and the pressure shows as 2. There is a screen which shows F1. I have lost the manual and dont know what F1 means. can anyone help me. combi boiler E80 valiant

Adam
June 2006
electrical fault ntc return

leigh
July 2006

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