The boiler had a full service in april 2010 everything fine, until I put radiators on sunday last.Radiators seemed to come on fine and heat up then after a while got too hot turned down by thermostat in hall.Then on going upstairs could hear a loud clicking noise.Just tried it again fine until I turned down thermostat in hall then again clicking.Any help greatly appreciated.Turned off now as it worries me.

sharon, September 2010

probably a fault with your motorised valve. the radiator temperature is controlled by the dial on the boiler, not your hall thermostat - it controls the room temperature.

Ian, September 2010