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Thanks Mick. Pressure is at resting state of 1.5 bar and increases to 1.6 bar when I run the hot tap. Is that close enough? I had somebody local look at it, who thought that the problem with the hot water only being very hot at low pressures could be either the heat exchanger or the...

Hi all, Total newbie here and to boilers. I have just moved house and now the proud owner of a Halstead Quattro. At first glance everything seemed fine, but after a short while we noticed: 1. The hot water is only very hot when the hot tap is on very low pressure. If we run the tap at...