many thanks for replying chris the water was flowing out side through the overflow not dripping it has only done this a few times so i switched the pump of waited a while and put it back on at a lower speed ( the plumber told me to try ) I cannot believe there would be a blockage as we had the...
i have had the system cleaned and been told the pump is ok i seem to get one of the rads upstairs always filling with air, i know the system is old but never had problem befor my hot water is very hot but the rads are no how the plumber had problems trying to balance them now sum get hot some...