the boiler keeps lossing pressure. everytime i switch it on i need to open up the black tap to fill it up with water. as a result the radiators are only warming up half way. i've tried bleeding them all but nothing is working any ideas.
I have a worcester CDI 30i with the same problem so I would be very interested if anyone has any ideas. I cannot find any leaks in radiator system but I have not ruled this out completely as I have not checked all the radiator joints under the floor boards.
Please any help
DOM
November 2008
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