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Hi all i have a worcester heatslave 26 32 oil boiler that has served me very well, today i noticed that if i put the hot water tap on to much the water would go luke warm, its never done this before and was wondering if the hot water thermostat was playing up and the preheat wasnt working...

Hi guys I've got a sime planet super fs not the best combi boiler in the world but that's what I inherited when I bought the property, it has a built in storage tank that preheats the water the problem is have is that once the preheated water is used the water goes cold so I can only get a few...