Hi A couple of years ago we had a downstairs shower built and a new combi boiler installed about a metre away. It worked fine until about a month ago but now, after about a minute, the temperature changes to barely warm. I suspected the boiler at first but I can run the hot tap in the shower room indefinitely without a problem. So I thought the problem might be with the shower itself, but the water initially comes through hot and only starts to become cool after a minute. If someone can point me in the right direction I'd be very grateful. Matt
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