Has anyone experience of these valves , we got some in a heat pack we ordered. When first fitted they all appeared to be working fine, however we have had a callback and two of them are shutting off early ie the rads get red hot for approx an hour when central heating first turned on., then they partially close limting flow. If the head is undone two or 3 turns on the valve body water rushes through and the rad again gets hot, when retightened then the valve closes. It only happens with these 2 heads as we have chenged them with others from the other rads and the same thing happens, its as though the pins on the valves are a little to long . Anyone any idea of these valves can be adjusted at all.or even the heads
Many Thanks for your help
Many Thanks for your help
