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no hot water or central heating - Help Please?

The combi boiler will not start up - we get a flashing red light - where the green light normally is when working. Can anyone help please.
laurie, September 2009
first thing I would check is the presure it should be 1/1.5 bar if not needs fill , check under the boiler the sould be a silver hose with a valve on turn it 1/4 turn when water presure says 1/1.5 bar tun of and the boiler should light.

erj, September 2009