Hi guys,
I have a back boiler heating system which, generally speaking, heats the hot water too. Currently not so, and whilst the water is tepid it is not hot. I have checked the stopcock valve on the header tank which was only replaced last year and this is fine. So this is filling the main tank no problem. Also, the hot water pipe into the coil in the tank is too hot to touch. Could anyone help? I'll be very grateful for any advise prior to spending money!