Hi my hive system is not shutting down the hot water correctly. I have changed the cylinder thermostat and at 0 on the tank thermostat when turned and call for hot water is on hive, as you turn it it does cone on to heat and if turned down to 0 turns off as well. If it's set to say 60 with just the hot water only it gets really hot. I have had boiler lock outs with the baxi solo boiler as well. Heating turns on and does what it's supposed to do. It does if asked by hive turn on the hot water and turn it off. I suppose it must be a wiring fault.It's a 3 wire thermostat with brown on 1 blue on 2 and black on common. Many thanks.