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

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