pressure gauge zero on saunia duval combi boiler?

recently I've been getting no hot water or central heating from my saunier duval combi boiler and the pressure gauge is showing zero, does anybody know what the fault may be and how to fix it.
Michelle - Manchester, February 2007


done
top up the presure gauge to one bar

jeff, February 2009
Fill to one bar

alan, March 2007
UT WATER IN THE BOILER TO 1 BAR

alan, March 2007
you need to represure your heating system . You do this by finding the filling loop and turning the black tap on it till you see the pressure clock raisr to 1 bar then you switch it back off .

steve, February 2007
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