help hot water always comes with Cent/H

cece_3

Hi, Can any one please help me? every time I put on my hot water my heating comes on as well regardless of what temperature my thermostat is set at and the whole place gets really hot. This prevents me from keeping my hot water on as often as I want to. Does anyone know how I can rectify this. I have got one of those boilers that do both electric and heating but the older type. I have tried using the manufacturers settings still no luck. I can't afford to have central heating running when it's this warm. Help!! My boiler has Wickes 40/50 on it if that helps anyone.