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Ariston keeps losing pressure E02 error code comes up!?

My Ariston condenser boiler loses pressure when its not fired up.... looking at other posts I have checked for leaks and which there arent any but I put a bucket by the blow off pipe outside and that has filled up.... It works ok once I refill from the 2 taps on the boiler but when its off overnight its empty again in the morning.... any ideas??

Jason
April 2010
AristonHeating, Home Heating SystemsLosing Pressure Boiler
I have had a look at the pressure value which seems ok... it only lets the water out as it cools and the pressure doesnt seem to rise ?????HELP!!!!

Jason
April 2010
Either your expansion vessel has lost its charge or your pressure relief valve is faulty.

David
April 2010

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