Hi Jason here i have a problem with heating to get central heating on we have to turn the tank stat up the room stat seems to do nothing.I have a new 3 way valve to fit but i am unsure weather this is the problem. The house is my girlfriends and her ex done the plumbing like some he is dodgy builder.I know basic plumbing and Electric but this troubles me setting the heating to come on in the morning will not work until i turn the tank stat up. I dont think we can afford a plumber as money is very tight!!!! She has to pay her ex off !!