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we have a oil fired central heating system, boiler works fine, hot water works fine when switched on, but when you switch the central heating on it wont come on on its own, you have to switch the hot water on with it, then when the boiler has kicked in, go up to the aering cupboard to...

Hi, can you help, my central heating wont work unless the hot water is switched on at the same time, Also i only get some of the radiators on and not all, some being ice cold still.. not to sure wether it is the mid position actuator that has broke. if so.. is it easy to replace by...