I have a worcster CDi boiler that only gives hot water when the heating is on. If the heating is off then the water takes ages to get warm. If I turn on the cold tap in the sink when having a shower the water then gets hot in the shower. To fill the bath I must run the tap extremly slowly. Can anyone help
sounds like ur diaphragm is on the way out also poss blocked plate heat exchanger.. the heat ex has 2 be removed 2 replace the diaphragm so it can be washed thru then
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