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Afternoon All, My Dad has just had his heating and hot water system (Micro bore) cleaned and flushed through, and every thing is working fine, other than the water in the expansion tank (loft) is now always very hot. Since the cleaning of the system, we have turned the pump down to a low...

Morning, I have been trying (unsuccessfully at present) to help my Old Man fix his Heating System. (Microbore system which we assume is clogged up with silt etc) but are having a few problems. Even on the 3 out of the 6 rads that work, the thermostats on the double entry valves do not...